Alternatives to ApiOnCloud
Compare ApiOnCloud alternatives for your business or organization using the curated list below. SourceForge ranks the best alternatives to ApiOnCloud in 2026. Compare features, ratings, user reviews, pricing, and more from ApiOnCloud competitors and alternatives in order to make an informed decision for your business.
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1
Checksum.ai
Checksum.ai
Checksum is a continuous quality platform that autonomously generates, runs, and maintains tests so engineering teams can ship AI-generated code without trading speed for reliability. Unlike copilots that wait for prompts, Checksum works as a background agent, detecting what needs testing, generating production-ready Playwright, and healing broken tests automatically. Seventy percent of failures resolve autonomously, keeping suites green without manual effort. Built on fine-tuned data from 1.5+ million test runs, Checksum covers every layer of the SDLC: end-to-end, API, and CI testing from a single platform. Tests are delivered as standard Playwright code, submitted as a PR to your repo. No vendor lock-in. Checksum integrates natively with Cursor, Claude Code, and 100+ coding agents via /checksum slash commands, so code is tested before a human ever reviews it. AI handles generation and healing on Checksum's cloud: no LLM tokens. The result: ship faster, with confidence. -
2
Blackbird API Development
Ambassador
Accelerate Development of Prod-Ready APIs. AI-Powered Code Gen, Mocking in Minutes, and On-Demand Ephemeral Test Environments. * Design Efficiently: Generate standardized OpenAPI specs with AI assistance, allowing you to begin coding faster. * Mock Effortlessly: Create shareable API mocks without manual coding, enabling rapid validation. * Automate Repetitive Tasks: Utilize AI to automatically generate boilerplate code for both client and server-side APIs. * Test Effectively: Access publicly available URLs for testing in a production-like test environment through Blackbird's ephemeral testing environments. * Debug Seamlessly: Set breakpoints and debug directly from your preferred IDE with Blackbird's integrated debugging tools. * Deploy Smoothly: Utilize a 24/7 hosted environment for progressive and repeated testing without reconfiguration, facilitated by Blackbird's containerized deployment.Starting Price: $69/month -
3
NeoLoad
Tricentis
Continuous performance testing software to automate API and application load testing. Design code-less performance tests for complex applications. Script performance tests <as:code /> within automated pipelines for API testing. Design, maintain and run performance tests as code and analyze results within continuous integration pipelines using pre-packaged plugins for CI/CD tools and the NeoLoad API. Create test scripts quickly for large, complex applications using a graphical user interface and skip the complexity of hand coding new and updated tests. Define SLAs based on built-in monitoring metrics. Put pressure on the app and compare SLAs to server-level statistics to determine performance. Automate pass/fail triggers based on SLAs. Contributes to root cause analysis. Update test scripts faster with automatic test script updates. Update only the part of the test that’s changed and re-use the rest for easy test maintenance. -
4
Global App Testing
Global App Testing
Global App Testing (GAT) enables tech teams to conduct testing across 189+ countries with a network of over 60,000 professional testers, using real devices and environments. By leveraging the GAT platform, you can streamline your testing process, boost release quality, and accelerate time-to-market while optimizing budget efficiency. The platform is fully integrated to seamlessly work with your existing DevOps or CI/CD tools. Whether you need ongoing QA support or additional resources to manage peak release cycles, GAT’s integration-driven approach allows you to manage your entire testing workflow—from test initiation to results analysis—without leaving your familiar tools like GitHub, Jira, and TestRail. With our integrated platform, both unscripted exploratory testing and scripted functional test execution can be embedded into your CI/CD and SDLC processes, ensuring perfect alignment with your automation testing tools. -
5
Testsigma
Testsigma
Testsigma is a low-code end-to-end software testing platform that works out of the box. It's built to enable modern Product teams to collaboratively plan, develop, execute, analyze, debug, and report on their automated testing—for websites, native Android and iOS apps, and APIs. Testsigma test scripts are code-agnostic. While the platform itself is built with Java, you can write test scripts in simple English or use the Test Recorder to generate airtight test scripts for websites and native mobile apps. You can also use the test recorder on your own device farm/grid or on Testsigma's built-in device lab on the cloud. The platform has built-in visual testing, parametrized or data-driven testing, 2FA testing, and more advanced features for easy test automation. Our AI automatically fixes unstable elements and test steps, identifies and isolates regression-affected scripts, and provides suggestions to help you find and fix test failures. -
6
T-Plan Robot
T-Plan
T-Plan Robot automates scripted user actions for Test Automation or Robotic Process Automation (RPA) on Mac, Windows Linux & Mobile. T-Plan develops and sells two main toolsets. 1) Test Automation and 2) Robotic Process Automation (RPA). T-Plan Robot is a highly flexible, easy to use, image-based black box GUI automation tool that creates robust automated scripts and exercises applications in the same way as would an end-user. T-Plan Robot is platform-independent (Java) and runs on, and automates all major systems such as Windows, Mac, Linux and Unix plus mobile platforms. We believe we have a solution for any environment. GUI automation interacts with your business sponsor and development teams throughout the whole project lifecycle. Working intuitively at the screen level business analysts can help testers drive testable paths through the application, whilst at the same time combining with the development team to define repeatable actions to test code in continuous development.Starting Price: $400/month/user -
7
Boozang
Boozang
Build. Test. Automate. Empower your whole team to build and maintain automated tests, not just developers. Meet your testing demands fast. Get full test coverage in days, not months. Our natural-language tests are extremely stable to code changes. When tests break our AI will repair it in minutes. Go Agile/DevOps by setting up Continuous Testing. Push features in production the same day. Boozang supports the following test approaches: - Codeless Record/Replay interface - BDD / Cucumber - API testing - Model-based testing - HTML Canvas testing The following features makes your testing a breeze - In-browser console debugging - Screenshots to show where test fails - Integrate to any CI server - Test with unlimited parallel workers to speed up tests - Root-cause analysis reports - Trend reports to track failures and performance over time - Test management integration (Xray / Jira)Starting Price: $249 USD / month / user -
8
Postman
Postman
The collaboration platform for API development. Simplify each step of building an API and streamline collaboration so you can create better APIs—faster. Postman is a collaboration platform for API development. Postman's features simplify each step of building an API and streamline collaboration so you can create better APIs—faster. Quickly and easily send REST, SOAP, and GraphQL requests directly within Postman. Automate manual tests and integrate them into your CI/CD pipeline to ensure that any code changes won't break the API in production. Communicate the expected behavior of an API by simulating endpoints and their responses without having to set up a backend server. Generate and publish beautiful, machine-readable documentation to make your API easier to consume. Stay up-to-date on the health of your API by checking performance and response times at scheduled intervals. Provide a shared context for building and consuming APIs, and collaborate in real-time.Starting Price: $12 per user per month -
9
WireMock
WireMock
WireMock is a simulator for HTTP-based APIs. Some might consider it a service virtualization tool or a mock server. It enables you to stay productive when an API you depend on doesn't exist or isn't complete. It supports testing of edge cases and failure modes that the real API won't reliably produce. And because it's fast it can reduce your build time from hours down to minutes. MockLab is a hosted API simulator built on WireMock, with an intuitive web UI, team collaboration and nothing to install. The 100% compatible API supports drop-in replacement of the WireMock server with a single line of code. Run WireMock from within your Java application, JUnit test, Servlet container or as a standalone process. Match request URLs, methods, headers cookies and bodies using a wide variety of strategies. First class support for JSON and XML. Get up and running quickly by capturing traffic to and from an existing API. -
10
Autostub
Torry Harris Business Solutions
AutoStub® is an essential tool to speed up API development. It can significantly reduce your build time by quickly designing, prototyping, documenting and testing APIs. AutoStub® creates a functional mock that allows developers to work with APIs before they are fully implemented. Available as a SaaS offering, for On-Premise deployments and in a hybrid model. Key Features Simulate ReST and SOAP services Input format - Swagger files for ReST, WSDL files for SOAP services Support for GET, POST, PUT, DELETE methods in ReST Create WSDL/Swagger 2.0 based mock services; generate dummy data for API testing Get an endpoint URL that can be used on a third party SOAP client tool Improves quality by facilitating functional testing Can handle multiple test scenarios together -
11
ATA
ATA
ATA is an AI-powered API management platform that centralizes design, testing, governance, documentation, and lifecycle workflows into a single intelligent workspace to help teams design, build, test, maintain, and govern APIs with higher quality and collaboration. It keeps API code, design documentation, specifications, test cases, and release notes in sync, reducing manual effort and drift while supporting OpenAPI specs, mock servers for frontend progress without backend readiness, and scheduled API monitoring to detect slow responses, timeouts, or failures early. It includes a Developer Studio for design-first OpenAPI creation and version control, E2E Test Automation with AI-generated robustness and security tests, mock servers, chained API workflows, and UI automation testing, and a Documentation Portal that centralizes API docs with multi-editor support, version management, secure access control, and auto-linked live endpoints. -
12
Hoverfly Cloud
Hoverfly Cloud
Hoverfly Cloud is a SaaS API simulation solution, owned by iOCO, allowing you to speed up delivery, reduce costs, and get resilient software to market faster. Designed from the ground up for integration, automation, and performance, Hoverfly Cloud allows developers and test engineers to replace the APIs their applications depend on with flexible lightweight simulations. This decouples the development and testing process from unreliable, expensive test systems and restrictive API sandboxes. API simulations can be configured to reproduce unexpected API behaviors such as high latency or random failures, making it possible to ensure that applications respond gracefully when the APIs they depend on misbehave. Hoverfly Cloud offers extremely cost-effective running costs, even for extreme and complex testing. Create API mocks and simulations in minutes with a fully featured testing solution, uncluttered by costly, complex features.Starting Price: $10 per month -
13
Octrafic
Octrafic
Octrafic is an open source, AI-powered command-line tool designed for automated API testing and exploration, allowing users to interact with APIs using natural language instead of writing scripts or configuring complex testing frameworks. By pointing the tool to any HTTP API or OpenAPI specification, users can describe what they want to test in plain English, and the built-in AI agent automatically generates test scenarios, executes real HTTP requests, validates responses, and produces structured results. It handles the full testing workflow, including endpoint discovery, request construction, schema validation, and error detection, enabling developers to focus on testing logic rather than low-level implementation details. It supports real-time execution against live APIs, ensuring accurate status codes and behavior without relying on mocks, and can export results into styled PDF reports for sharing with teams or stakeholders.Starting Price: Free -
14
Mocki
Mocki
If you want to create a simple API for testing purposes, simply enter a response body and get your custom API URL. Use Mocki to create a fully-fledged mock API. Using Mocki you can create, run, and deploy mock APIs. Use your mocks to design your API, serve static responses, simulate error scenarios, and remove dependencies to external services. Sign up today for a free 7-day trial. Sync your service with your code repository to keep your mock service up to date with the latest changes without manual steps. Using our managed hosting solution your mock service is always available for any consumer. Access a dashboard to gather insights on how your mock service is used. Using our open source CLI you can run your services locally. This enables you to run your service without requiring an internet connection to reach external services. A mock API can also be useful when testing backend apps. A common case is that your API or service needs to call external services over HTTP.Starting Price: $15 per month -
15
KeyRunner
Launchiam
The Platform to Build, Test & Secure APIs. Transform how you design, test, and manage APIs. Collaborate easily, run tests locally, and protect sensitive data every step of the way. No Signup or Login Get started instantly—no need for lengthy sign-ups or logins. VS Code Extension & Desktop Apps Work where you're comfortable! Our VS Code extension and desktop apps integrate seamlessly with your existing workflow. Local Storage & Execution Keep data secure with local storage and execution, ensuring sensitive information stays on your device. Run Unlimited Collections Test and manage unlimited API collections, enabling effortless scaling for all your projects. Mock Servers Streamline development by creating mock servers for fast testing and API response simulation. Scriptless Testing & Playground Simplify testing with our user-friendly interface—experiment with APIs without writing any code. Our enterprise features take it even further. Contact us!Starting Price: $39/month/user -
16
MockAPI
MockAPI
Quickly set up endpoints, generate custom data, and perform operations on it using a RESTful interface. Define resource schema and data generators for each field. Set up relations between resources and automatically generate endpoints. MockAPI is a simple tool that lets you easily mock up APIs. It is meant to be used as a prototyping/testing/learning tool.Starting Price: $5 per month -
17
Apidog
Apidog
Apidog is a complete set of tools that connects the entire API lifecycle, helping R&D teams implement best practices for API Design-first development. Design and debug APIs in a powerful visual editor. Describe and debug easily with JSON Schema support. Automate API lifecycle with Apidog's test generation from API specs, visual assertion, built-in response validation, and CI/CD. Generate visually appealing API documentation, publish to custom domain or securely share with collaborative teams. Local and cloud mock engine generate reasonable mock data according to field names and specifications without writing scripts. Quality tools have the power to unite your entire team, while ensuring that no task is needlessly repeated. Effortlessly describe your API as you test it, and generate JSON/XML schemas with a simple click. Generate test cases from APIs, add assertions visually, and create test scenarios with branches and iterations easily.Starting Price: $9 per user per month -
18
vREST
vREST
Validate response of your REST APIs. Write Test Cases, Run them, Validate it's Response, Find out failure reasons using Diff Report, and much more. Powerfully integrate tools like JIRA, Jenkins, Team City, Bugzilla, Slack etc. Easily pluggable with any build or continuous integration system and lets your team remains in sync on test failures. Using API Mocks, your front-end team won't need any back-end API for their development. It means that your front-end team can work in parallel with the back-end teams. Apart from it's Easy-To-Use interface and Great Customer Support Team, there are some features that make vREST stand apart in its competition. Feeling lazy to write test cases? Don't Worry, in vREST you can simply record test cases by manually using your application once. vrunner lets you execute your test cases just by running a command on your terminal. So every time you deploy your application, you just need to Run a Command to validate your APIs.Starting Price: $20 per month -
19
Apiary
Oracle
Write an API in 30 minutes. Share it with your teammates or customers. Let them use the API mock to take your API for a spin--without writing any code. Iterate, rinse & repeat. Coding can wait until you know what your developers really need. DNA for your API, powerful, open sourced and developer-friendly. The ease of Markdown combined with the power of automated mock servers, tests, validations, proxies, and code samples in your language bindings. It's often hard to see how an API will be used until you have the chance to code against it. What wireframes are for UI design, a server mock is for API design. A quick way to prototype an API - even before you start writing code. Two clicks will link Apiary to a repository of your choice. It’s up to you whether you make the API Blueprint private or public and let the community contribute. We update API docs every time you commit, and we push commits to the repo whenever you update your documentation at Apiary. It's a virtuous cycle. -
20
Speedscale
Speedscale
Validate the performance and quality of your apps with real-world traffic scenarios. Preview code performance, quickly spot problems, and rest assured your app runs optimally when it’s time to release. Mimic real-life scenarios, test load, and create intelligent simulations of third-party and internal backend systems to better prepare for production. No need to spin up costly new environments each time you test. Built-in autoscaling drives your cloud costs down even further. Bypass complex, homegrown frameworks and manual test scripts so you can ship more code, faster. Be confident that new code changes can handle high-traffic scenarios. Prevent major outages, meet SLAs, and protect the customer experience. Simulate third-party systems and internal backends for more reliable, affordable testing. No need to spin up costly, end-to-end environments that take days to deploy. Seamlessly migrate off legacy architecture without disrupting the customer experience.Starting Price: $100 per GB -
21
ActorJS
Abstraktor AB
With ActorJs you can isolate very complex connectivity-based systems. ActorJs arranges all the scenography you need so you can focus getting the right testing done. It handles any environment, encapsulating the system under test. Full control through separations, and no need for traditional simulators or mock-ups of processes. It allows you to go beyond test and focus on making development efficient. Minimal test coding, to create unique building blocks incrementally, and reuse them. Visualization (sequence diagrams, logging, test results, specification generation). Every tester/developer has a local instance of the tool. Just download from repo, and run. ActorJs is well prepared for Continuous Integration. Using ActorJs while developing software accelerates development. With ActorJs, you can go beyond simulators and mock-ups to easily isolate the SUT and execute the test case, in less time and at lower cost than with traditional testing. Let's start by analyzing what we want to test. -
22
Stoplight
Stoplight
Stoplight is an API Design, Development, and Documentation platform. Use Stoplight Platform to enable consistency, reusability, and quality in your API lifecycle, all with an easy, enjoyable developer experience. Here's what you can do with Stoplight Platform: - Design APIs with our easy visual designer, Stoplight Studio - Mock API designs automatically with Stoplight Prism mocking - Collaborate on your designs and invite internal and external users to provide feedback - Develop faster and better APIs - Test and enforce against style guides with Stoplight Spectral - Document both internal and external APIs automatically to create a delightful experience Utilize and integrate design-first workflows to quickly scale up standardized, collaborative, and well-governed API programs.Starting Price: Free -
23
RestSequence
Opcito
RestSequence is a no-code platform that allows users to create end-to-end product test workflows by using underlying product-under-test APIs. It enables users to create, manage, and execute test cases and scenarios efficiently. By harnessing the power of their application's Swagger API collection, RestSequence empowers users to quickly design and test scenarios, guaranteeing superb application performance and reliability. With RestSequence, you can onboard generated test scenarios, integrate them into your CI/CD pipeline, and run them on nightly, weekly, or release builds. The best part is that the output file generated once using RestSequence can be used for future testing scenarios without making any changes. RestSequence reads and parses API details (method, URL, payload, request body, etc.) from a Swagger specification file. It tests each API endpoint for correct responses, status codes, required fields, and invalid data, tracking the created resources during test execution. -
24
Beeceptor
Beeceptor
Beeceptor is a high-performance, no-code platform that eliminates development bottlenecks through instant API mocking and real-time traffic inspection. Don't wait for backend teams to deploy; spin up a named subdomain in seconds and start integrating immediately. Key Capabilities: - Multi-Protocol Support: Simulate REST, SOAP, GraphQL, and gRPC endpoints without writing server-side code. - AI-Powered Mocking: Use AI to generate realistic, contextually relevant test data or import OpenAPI/Swagger for CRUD-ready mocks. - Chaos Engineering: Test "unhappy paths" by simulating latencies, timeouts, and rate limits. - Local Tunneling & Proxying: Expose localhost via HTTPS and inspect live webhooks or mobile traffic in real-time. Decouple your frontend and mobile teams, stabilize CI/CD by removing third-party dependencies, and go from API design to functional mock in minutes. Beeceptor scales from solo devs to enterprise-grade integration testing.Starting Price: $10 per month -
25
SOAPSonar
Crosscheck Networks
Validate the functional behavior of APIs with client input simulations. Success criteria rules provide validation and regression testing of API behavior. Tests can be run on-demand or automated. Supports latest OpenAPI standards for automatically parsing OpenAPI documents and building test cases for all of the defined operations. Test authentication schemes including OAuth, SAML, PKI, Basic Auth, Amazon Auth, and Kerberos. Verify SSO tokens and cookies. Create behavior baselines and run regression tests to determine if any breakage or change of behavior occurs. Includes JSON and XML Diff capability. Test encryption and decryption of JSON, XML, REST, and SOAP message patterns. Simulate load from multiple virtual clients to measure and validate the performance criteria of the target APIs. Dynamic security and identity provide real world simulated inputs. Built-in support for AWSv4 signatures to authenticate to and test Amazon AWS APIs.Starting Price: $80/month -
26
EasyMock
EasyMock
Most parts of a software system do not work in isolation, but collaborate with other parts to get their job done. In a lot of cases, we do not care about using real collaborators implementation in unit testing, as we trust these collaborators. Mock objects replace collaborators of the unit under test. To test a unit in isolation or mount a sufficient environment, we have to simulate the collaborators in the test. A Mock Object is a test-oriented replacement for a collaborator. It is configured to simulate the object that it replaces in a simple way. In contrast to a stub, a Mock Object also verifies whether it is used as expected. EasyMock has been the first dynamic Mock Object generator, relieving users of hand-writing Mock Objects, or generating code for them. EasyMock provides Mock Objects by generating them on the fly using Java proxy mechanism. -
27
Zoho QEngine
Zoho
Manage all test cases across platforms in one place, with Zoho QEngine's no-code, low-code as well manual coding features. Create, develop, manage and execute automated functional tests while collaborating with your team. Zoho QEngine's test automation software is everything you need to run your entire testing lifecycle. Zoho QEngine comes equipped to test web applications across browsers. With minimal coding/no-code build and manage automated test cases for web applications 10X faster. Automated testing for web applications is made simple with Zoho QEngine. With functionalities such as mobile emulators and simulators, Appium compatibility, and real devices Zoho QEngine ensures your test cases for mobile meets quality standards. Test, assert, manage, and automate all types of API requests and responses with Zoho QEngine's intuitive cloud-based API testing software. With interoperability API testing, Zoho QEngine has the functionalities you seek in a testing tool.Starting Price: $101.57 per month -
28
Conektto
Conektto
Conektto simplifies and eliminates the complexity in API integrations. You focus only on designing your B2B integrations, we take care of the rest of the repetitive technical steps with AI. Mastercraft API design using Conektto’s Design Studio. Powered by NLP, you can design and simulate API contracts effortlessly with industry’s best standards. Autonomous test studio for your entire API testing needs: mocking, test generation, test data, test execution and performance test. All-in-one intelligent platform to design, simulate, visualize, code, mock, test and deploy enterprise-grade API effortlessly. Intelligent API fabric to design and build complex integrations effortlessly on hybrid APIM infrastructure. -
29
PFLB
PFLB
PFLB is an AI-powered load testing platform where you can simulate massive traffic to your websites, and applications. It’s easy to use and super helpful for teams that want to ensure their product is ready to scale. Features: Realistic testing with scenario-based traffic simulation. Importing your production load profile with Google Analytics integration. Easy scripting with an intuitive no-code editor. Executing advanced JMeter scenarios at scale. Resolving bottlenecks with AI-powered performance insights. Discovering load testing results with Grafana dashboards. Protocols: HTTP, HTTPS, gRPC, JDBC, JMS, AMQP, MQTT, Kafka.Starting Price: $50/month -
30
SwytchCode
SwytchCode
SwytchCode is an AI-powered “solutions engineer” platform that transforms API and SDK documentation into interactive developer experiences. It allows API publishers to upload an OpenAPI spec, Postman collection, or SDK, and within minutes, the system generates multilingual code samples (15+ programming languages), live playgrounds, and ready-to-run workflows that reduce developer integration time from hours to under two minutes. It supports smart testing with mock calls, analytics to surface developer drop-off or usage issues, and multi-step workflow generation via drag-and-drop or natural-language prompts, enabling API teams to significantly reduce support costs and improve adoption while maintaining high uptime and broad language support. With a mission to eliminate friction between APIs and developers, SwytchCode is a unified AI-driven interface that sits alongside your API.Starting Price: $19 per month -
31
SoapUI
SmartBear
Whether open source or commercial, SoapUI testing tools make it easy to create, manage, and execute end-to-end tests on REST, SOAP, & GraphQL APIs, JMS, JDBC, and other web services so you can deliver software faster than ever. For developers and testers looking to accelerate their ability to deliver REST & SOAP APIs, SoapUI Open Source is the simplest and easiest way to begin your API testing journey. Automate and fit API testing into your team’s continuous delivery pipeline with the next generation tool built for validation of REST, SOAP, GraphQL, microservices, and other back-end services. APIs, or Application Programming Interfaces, have become the center of software development, connecting and transferring data and logic across disparate systems and applications. Luckily, testing them can greatly improve the efficiency of your testing strategy as a whole, helping you deliver software faster than everStarting Price: $599 per year -
32
Fiddler
Progress Software
Capture all HTTP(S) traffic between your computer and the Internet with Telerik Fiddler HTTP(S) proxy. Inspect traffic, set breakpoints, and fiddle with requests & responses. Fiddler Everywhere is a web debugging proxy for macOS, Windows, and Linux. Capture, inspect, monitor all HTTP(S) traffic between your computer and the Internet, mock requests, and diagnose network issues. Fiddler Everywhere can be used for any browser, application, process. Debug traffic from macOS, Windows, or Linux systems and iOS or Android mobile devices. Ensure the proper cookies, headers, and cache directives are transferred between the client and server. Supports any framework, including .NET, Java, Ruby, etc. Mock or modify requests and responses on any website. It’s a quick and easy way to change the request and responses to test websites without changing code. Use Fiddler Everywhere to log all HTTP/S traffic between your computer and the Internet.Starting Price: $12 per user per month -
33
vStellar
vStellar
vStellar is a low-code, AI-powered software testing framework that simplifies automation for QA teams, developers, and enterprises. It enables effortless UI, API, and mobile testing within a unified environment, helping teams deliver accurate, consistent, and scalable results. Built for modern development pipelines, vStellar integrates seamlessly with IntelliJ IDEA, CI/CD tools, and version control systems to support end-to-end automation workflows. Its intuitive plugin and parallel testing capabilities reduce setup time while increasing efficiency across test execution. QA engineers can validate visual interfaces, endpoints, and performance metrics all within one framework. Trusted by global teams, vStellar empowers organizations to test smarter, deliver faster, and maintain the highest quality standards in every release. -
34
Telerik JustMock
Progress Telerik
JustMock allows you to easily isolate your testing scenario and lets you focus on the logic you want to verify. It integrates seamlessly with your favorite unit testing framework and makes unit testing and mocking simple and fast. Mock everything like non-virtual methods, sealed classes, static methods and classes, as well as non-public members and types everywhere even members of MsCorLib. The perfect tool for unit testing your .NET code whether you're dealing with complex and hard to maintain legacy code or code written with best practices in mind. From finding what arguments your mock object is called with to why it’s not called or why it’s called repeatedly, the JustMock Debug Window helps you find the answers you are looking for while debugging your unit tests. JustMock allows you to receive critical feedback about the completeness and thoroughness of your unit tests—an absolute must for any organization that strives for high-quality code.Starting Price: $399 per developer -
35
ACCELQ
ACCELQ
ACCELQ offers AI-powered No-Code test automation and management built on a cloud-native platform. ACCELQ provides a unified platform for web, mobile, API, database, and packaged apps. Automation-first, codeless capabilities make it easy to use for testing teams without deep programming expertise. ACCELQ allows businesses to achieve 3x productivity and over 70% savings with its industry-first autonomics-based automation platform. ACCELQ was named a leader in The Forrester Wave™: Continuous Automation Testing Platforms, Q4 2022. ACCELQ’s App Universe and predictive scenario designer enable the development of test scenarios based on path analysis and predictive analytics, and unique test data permutations are determined to provide coverage for all possible business process scenarios. -
36
Mocke
Mocke
Mocke (Mock Email Campaign) is an AI-powered tool for testing cold email strategies without sending real campaigns. Users upload a CSV file to launch a mock campaign in just one click and receive simulated outcomes, including reply rate, unsubscribe actions, report-spam flags, internal forwards, reminders, and ignores, in as little as one minute. This allows rapid AB testing of copy, subject lines, CTAs, and messaging, and uncovers hidden lead behaviors without launching real campaigns, saving over 99% of the time traditionally needed for testing while offering deep analytics and insights.Starting Price: $79 per month -
37
Assertible
Assertible
The easiest way to test and monitor your web services. Gain confidence in critical infrastructure by using Assertible's automated QA tools to test and monitor your web services across deployments and environments. Assertible provides a reliable first line of defense against web service failures by providing simple and powerful assertions to test and monitor your APIs and websites. Lower the number of false positives in your automated QA tests and be confident your APIs are healthy. Keeping your tests up to date can be a burden, but with Assertible you can automatically sync your API tests with the latest changes in your specification. As you add and update responses, parameters, headers, and more, updating your Assertible API tests is as easy as clicking sync. Assertible integrates with the tools you're already using and lets you do things like execute your web app tests when you push code to GitHub, or send alerts to Slack if failures happen.Starting Price: $25 per month -
38
API Tester
API Tester
API Tester is a completely free mobile app available on iOS, Android, macOS, and watchOS. It is a functional API testing tool that allows users to complete compound tasks on any device. - Test any API on the go: REST, GraphQL, WebSocket, SOAP, JSON RPC, XML, HTTP, HTTPS. - GET, POST, PUT, PATCH, DELETE, etc. HTTP request methods are supported. - Perform the API calls with any kind of request data encoding and transfer type. - Import collections from Swagger, Postman, and YAML, or import requests using cURL, as well as export created requests via link or cURL. - Use a powerful GraphQL editor with full-scale experience. - WebSocket testing tool is available: handles connection and message exchange via WS or WSS. The API Tester mobile app allows you to get the job away from your workstation. Save time, work from anywhere!Starting Price: Completely free -
39
MockLab
MockLab
Craft your simulation using the friendly, no-code UI or go fully automated with the 100% WireMock-compatible API. Simulate stateful behaviour in your mocked API using a simple finite state machine model. Test your app to destruction by injecting delays, dropped connections, drip-drip responses and corrupt HTTP payloads. A MockLab plan's collaborator limit is the total number of individual collaborators + team members that can be added by the owning account so e.g. if your subscription has a collaborator limit of 2, this means that you and 2 colleagues can work on your APIs. Test your app to destruction by injecting delays, dropped connections, drip-drip responses and corrupt HTTP payloads.Starting Price: $29 per month -
40
JMeter
Apache Software Foundation
The Apache JMeter™ application is open source software, a 100% pure Java application designed to load test functional behavior and measure performance. It was originally designed for testing Web Applications but has since expanded to other test functions. Apache JMeter may be used to test performance both on static and dynamic resources, Web dynamic applications. It can be used to simulate a heavy load on a server, group of servers, network or object to test its strength or to analyze overall performance under different load types. -
41
ITRS Load Testing
ITRS Group
Ensure scalability on websites, apps and APIs. For the always-on enterprise. Control the ramp and bandwidth of over thousands of global virtual users and simulate real-world dynamics. Integrate with AppDynamics, New Relic, and Dynatrace to drill down, pinpoint critical issues, and identify root-cause. Measure the quality of user experience by viewing a stream of real browser render times and screenshots while tests run. Get feedback in real time, adjust parameters on the fly, and find optimal concurrency, breakage points and peaks. Consumer expectations are at an all-time high. Users demand a near instantaneous experience across all devices, and at all times. To compound this, business and IT leaders recognizes their mission-critical application stack is growing and becoming increasingly complex. When sluggish response times, performance bottlenecks, and full-blown website and application failures drive visitors away, the end result is lost revenue and reputational damage. -
42
Qodex.ai
Qodex.ai
Qodex.ai is an AI-powered platform that streamlines API testing and documentation, offering full automation without human intervention. Developed by and for developers, it enables users to add tests in plain English, eliminating the need for coding. The system automatically adapts as products evolve, ensuring continuous test coverage. Users can upload existing API files or utilize Qodex's SDK to create new ones, ready for testing in minutes. The AI learns the API and generates tests automatically, with the option to create custom tests by writing requirements in simple English. Tests can be run anytime, providing easy-to-read reports to quickly identify and fix issues. The platform also offers interactive API documentation, allowing users to ask questions and receive instant answers in an intuitive interface. It is a reliable tool for both front-end as well as back-end testing.Starting Price: $199 per month -
43
RNDGen
RNDGen
RNDGen Random Data Generator is a free user-friendly tool for generate test data. The data creator uses an existing data model and customizes it to create a mock data table structure for your needs. Random Data Generator also known like json generator, dummy data generator, csv generator, sql dummy or mock data generator. Data Generator by RNDGen allows you to easily create dummy data for tests that are representative of real-world scenarios, with the ability to select from a wide range of fake data details fields including name, email, location, address, zip and vin codes and many others. You can customize generated dummy data to meet your specific needs. With just a few clicks, you can quickly generate thousands of fake data rows in different formats, including CSV, SQL, JSON, XML, Excel, making RNDGen the ultimate tool for all your data generation needs instead of standard mock datasets.Starting Price: Free -
44
Loadmill
Loadmill
Create automated API tests from real user sessions. Loadmill helps companies unclog the Dev pipeline, boost velocity and automate manual testing by replaying real user behavior. Eliminate regression bugs by replaying thousands of tests based on real user flows. Reduce your regression cycle duration and keep your team focused on what matters. Cut costs on ineffective testing efforts and maintenance. Automatically generate regression tests from real user recordings. Move fast and keep your team focused on what matters. Automate the entire QA process by replaying real user behavior. Integrate Loadmill into your continuous delivery pipeline and start shipping faster. Loadmill is using real traffic from websites around the world to test your server's performance. Get results fast - launch tests within seconds & detect bottle-necks before production. Truly distributed - unlimited unique IPs and locations per test. Record and replay your own user scenarios at scale. -
45
HttpMaster
Borvid
HttpMaster is a debugging and testing tool for various HTTP applications with special focus on web APIs and RESTful web services. Key features: - HttpMaster project to store complete definition of HTTP calls in one single place. - Broad set of HTTP properties (HTTP headers, URL encoding, etc.). - Dynamic parameters to simulate variations of input data or create global API values. - Response data validation with logical expressions. - Request chaining to use data from previous request with the next request. - Extensive data upload support, including 'multipart/form-data'. - Request data builder for creating request body with an optional dynamic parameters. - Request item execution with detailed progress monitoring. - Execution groups to create batches of requests. - Comprehensive execution data review and management. - Basic request tool for ad-hoc execution. - Command line interface. - PDF reports. - Support for cURL commands.Starting Price: Starting from $69 -
46
HCL OneTest
HCL Technologies
HCL OneTest provides software testing tools to support a DevOps approach: API testing, functional testing, UI testing, performance testing and service virtualization. It helps you automate and run tests earlier and more frequently to discover errors sooner — when they are less costly to fix. HCL also provides a bundled offering under a new consumption model that changes the way you can use and deploy DevOps software. The new offering helps simplify your planning for adoption and growth of critical DevOps products. HCL OneTest UI enables testers to take automation all the way from mainframe terminals with 3270 interfaces, through .NET- and Java-based thick client applications. Additionally, it works with the latest top browsers, ERP systems such as SAP and Oracle, right up to HTML5-based responsive web applications that are built on modern frameworks like Angular, React and Vue.js. -
47
TAST
SIPSA
TAST, Test Automation System Tool is a comprehensive cloud test automation framework that enables businesses to maximize their test automation across the complete testing process from an End User´s perspective. It is easy to use and its graphical interface defines the automated test cases across technological platforms. TAST automates: *Cross Browser testing *Mobile testing *Desktop applications testing *DDBB testing: Oracle, PostgreSQL, MySQL, Db2. *File testing: txt, pdf, word, excel, csv, xml. *Mainframe testing: AS400, Host *APIs testing *Interface testing. *Remote Server testing. Types of tests you can automate with TAST: *Integration *Functional *System: Regressive, stress, load, parallel *Acceptance *A/B. -
48
Loader.io
SendGrid
Loader.io is a FREE load testing service that allows you to stress test your web-apps & apis with thousands of concurrent connections. Use the web-interface or API to register your app for testing. We'll simulate connections to your application for the duration. Monitor the test in real-time, then share the results with your team.Starting Price: $99.95 per month -
49
TestWheel
TestWheel
TestWheel is an AI-powered, no-code platform that delivers fast, end-to-end automated testing for web, performance, API, and native mobile applications. Whether you’re transitioning from manual testing or moving away from open-source frameworks, TestWheel simplifies the process with codeless test creation and intuitive workflows. Our mission is to make software testing accessible for teams of all sizes through a comprehensive, easy-to-use framework. TestWheel offers the full range of AI-powered testing features available on the market, including an AI agent that writes test cases through natural language conversation. The platform supports self-healing tests, reducing maintenance time, and serves as a seamless transition tool—allowing teams to import existing manual tests from Jira, Azure DevOps, or Selenium scripts into a fully automated, self-healing, no-code suite. Free trials are available for teams, and we also provide custom integrations and on-premises solutions.Starting Price: $10/month -
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GetMockInterview
GetMockInterview
GetMockInterview is an AI-powered platform that helps users prepare for job interviews with realistic mock interview practice. It allows candidates to simulate real-world interview scenarios across industries and roles, including software engineering, HR, sales, and product management. Users interact with an AI interviewer that provides real-time transcription, smart answer suggestions, and personalized feedback. The tool creates a safe space for practicing interview skills, building confidence, and improving communication. With flexible plans, users can start with a free 5-minute trial or choose advanced options for longer, more detailed sessions. By blending AI-driven simulations with actionable insights, GetMockInterview equips job seekers and professionals to perform their best.Starting Price: $5/session
