Best Free Authentication Software

FusionAuth provides a comprehensive authentication platform designed for flexibility, security, and developer ease. It supports a wide range of authentication methods including username/password, passwordless, multi-factor authentication (MFA), and social logins. FusionAuth is built API-first, allowing seamless integration into any tech stack or architecture. It supports industry protocols like OAuth2, OIDC, and SAML for secure and standards-compliant authentication. Whether deployed on-premises, in the cloud, or in hybrid environments, FusionAuth gives you full control over the user login experience while helping you meet compliance requirements such as GDPR, HIPAA, and COPPA.

World's fastest MFA with the highest login success rate above 99%. Highly secure, password-free login in just two seconds. MIRACL works on any device or browser, removing the barriers to authentication to optimise the the user experience, decrease costs, and win lost revenue. Protect your users. Simplify their journey. MIRACL Trust offers a safer, smoother authentication experience. One step. No passwords. No problem. Traditional multi-factor authentication is slow and cumbersome. MIRACL is a smoother, safer alternative to traditional MFA. 2 seconds to log in with error rates as low as 1/10th that of passwords. No passwords necessary. One PIN, and you’re in. Our cryptographic technology means that user info stays with users. MIRACL Trust offers an effortless login experience that puts users first, rolls out hassle-free, and keeps data locked up tight. PSD2 SCA compliant, GDPR compliant and satisfies NJ Gaming MFA requirements.

LastPass is a cloud-based password manager available on any system or device, ensuring credentials are protected, private, and always within reach. Simple to set up and effortless to use, LastPass delivers the world's most convenient password management experience for consumers and businesses of all sizes and technical requirements. Say goodbye to password fatigue by generating, sharing, accessing, and managing credentials at the click of a button, while preventing bad actors from accessing precious data and account logins. Businesses also utilize LastPass to consolidate their tech stacks or to fill access management gaps with native integrations for MS Entra, Okta, and other IdPs and IAMs. With over 100 customizable policies, flexible privileges, detailed reporting, MFA and passwordless authentication options, LastPass makes it easy for organizations with numerous logins and increasing security risks to standardize password management company wide.

Rublon enables your workforce to securely access your organization's networks, servers and applications. Protect your data via easy-to-use multi-factor authentication and comply with data protection regulations like GDPR. Deploy Rublon organization-wide, enabling MFA for all your cloud apps, VPNs, servers, workstations, internal as well as on-premise apps.

Finally, a password manager built for collaboration. Secure, flexible, and automation-ready. Trusted by 10,000 organizations, including Fortune 500 companies, newspapers, governments, and defense forces. Passbolt servers are designed to be simple to install and easy to manage. Yet they are enterprise-ready and can support complex setup for high availability. Passbolt can be used from your browser or mobile phone. Sharing happens in real-time. Desktop apps are coming soon. Retrieve, store and share passwords programmatically with the JSON API. Automate at scale with Passbolt CLI. Real-time access logs. Privacy is in our DNA, but also in the DNA of European laws (to make sure we don’t change our minds). Passbolt self-hosted source code comes under an AGPL license. Yes, even the commercial version. You are free to audit it, contribute to it, and redistribute it. This is why we have a healthy community of thousands of organizations in all sectors.

Identity Governance and Web Access Management. As new employees join your organization, you face the conundrum of ensuring that they are given rights to all the systems and resources they need to do their work on the day they join the firm. Similarly, when a person changes positions within the firm, access that is no longer relevant must be revoked and access that is needed for their new position must be granted. For the situation of users leaving the firm or being terminated, it is even more imperative that permissions be addressed. Access to sensitive applications and data must be disabled/removed in a timely manner with traceability to avoid the consequences of a disgruntled user.

Aerobase is an open-source Identity and access management (IAM) platform that specializes in identity federation, SSO, strong & adaptive authentication, access control, account management & identity provisioning, API & microservices security and privacy regulation. This guide helps you get started with Aerobase. It covers server configuration and use of the default database. Advanced deployment options are not covered. For a deeper description of features or configuration options, consult the other reference guides.

OpenOTP Security Suite is a European Enterprise-grade Security all-in-one Solution for Identity & Access Management (IAM), including : - Multi-Factor Authentication (MFA/2FA) with U2F / OTP, applicable even for Legacy Applications - Federation Services (SSO with OpenID & SAML / ADFS) - Network Access Control (protecting Wifi & Ethernet Swiches) - VPN security (via an included Radius Bridge), designed specifically for remote work - Windows logins & Remote Desktop Services (RDS) OpenOTP Security Suite combines mobile technology with proven security standards to offer professionals and non-professionals the best alternative, bringing modularity and flexibility to suit any infrastructure's needs. OpenOTP Security Suite is an enterprise-class European security solution designed for installation on-premises or in a private cloud. ++ Free Token App (and compatible with most existing hardware and software tokens) ++ Free 30-day Trial ++ Freeware (<25 users)

HYPR fixes the way the world logs in. Organizations are faced with the challenge of achieving secured and seamless authentication coupled with a flawless user experience at a time when it’s more critical than ever. HYPR’s passwordless multi-factor authentication (PMFA) platform decouples authentication from the organization’s current and future identity providers and eliminates the traditional trade-off between security and user experience by providing uncompromising assurance and consumer-grade experience with true passwordless and phishing-resistant MFA. The solution is trusted by more than 60M users worldwide. With deployments taking hours rather than weeks or months, organizations decrease the risk of attack, increase positive user experience, and lower operational costs.

Choose us because we offer the easiest to use technology without sacrificing features or performance. We back this up with outstanding support and care, delivered under a fair and cost effective pricing model Our technology is used by the smallest startups with big ideas and small budgets all the way to global enterprises and anything in between. We love them all the same! Easy to use Load balancing, WAF, GSLB and SSO/Pre-Authentication. It is also the Only true ADP Application Delivery Platform where the functionality and lifespan can be enhanced using the app store or applications that you develop in house.

Control the access and distribution of your software product. With dozens of features, flexibility is maximized: you can create short term access keys, notify users when updates are available, view access logs and even give resellers the ability to purchase new keys without contacting you. Choose from registration-required or key-only authentication for each application. If key-only is your preference, your users will appreciate the speed. If you require users to register an account on System Locker, they can choose between verifying their email or verifying their Discord account. Our dedication to reliability remains strong, even as hundreds of new users join every day.

ZITADEL is an open-source identity and access management platform designed to simplify authentication and authorization for applications. It offers a comprehensive suite of features, including customizable hosted login pages, support for modern authentication methods such as Single Sign-On (SSO) and social logins, and enforcement of multifactor authentication to enhance security. Developers can integrate authentication directly into their applications using ZITADEL's APIs or build dedicated login interfaces. The platform supports role-based access control, allowing for precise permission assignments based on user roles, and is inherently multi-tenant, facilitating easy extension of applications to new organizations. ZITADEL's extensibility enables seamless adaptation to various workflows, user management processes, and brand guidelines, with features like ZITADEL Actions that execute workflows after predefined events without the need for additional code deployment.

Proton Authenticator is a privacy-first two-factor authentication app that generates time-based one-time passwords to add an extra layer of login security for online accounts beyond just a password, so users can secure accounts across all their devices. It is open source and uses end-to-end encryption, meaning all cryptographic operations and secret keys are generated and stored locally, and even Proton cannot see your unencrypted 2FA data, offering transparency and strong privacy by design. Users can sync 2FA codes across devices with encrypted backups (including via iCloud or a Proton Account), import existing codes from other authenticator apps, and export them if needed, giving flexibility and control over 2FA secrets without vendor lock-in. Proton Authenticator is free to use, has no ads or tracking, and supports secure practices like biometric locks and offline access, so users can generate login codes.

Ente Auth is a free, open-source two-factor authentication app that helps users generate and manage time-based one-time passwords to secure logins for online accounts with an extra layer of verification beyond just a password, offering end-to-end encrypted backups so you never lose your codes and they remain private even to the service itself. It syncs codes across mobile, desktop, and web clients using fully encrypted channels, lets users import existing 2FA tokens by scanning QR codes or manual entry, and provides features like offline code generation, tagging and searching of codes, pinning favorites, icon identification, and quick “next code” display for faster logins. Backups are encrypted with audited cryptography, giving users peace of mind that only they can decrypt and access their 2FA secrets, and codes can be shared securely with teammates via encrypted links with optional expirations.

WSO2 Identity Server is API-driven, is based on open standards with the deployment options of on-premise, cloud or hybrid. It supports complex IAM requirements given its high extensibility. WSO2 Identity Server helps you do single sign-on and identity federation backed by strong and adaptive authentication, securely expose APIs, and manage identities by connecting to heterogeneous user stores. Leverage the power of open-source IAM in your enterprise to innovate fast and build secure Customer IAM (CIAM) solutions to provide an experience your users will love

Allthenticator is a passwordless authentication platform designed to unify digital and physical access through a single smartphone-based identity. It enables proximity-based login to computers, websites, and servers, while also unlocking physical doors with the same device—eliminating passwords, tokens, and keycards. The platform supports SSH key signing, passkey logins, OTP management, and native integrations with identity providers like Azure AD and Okta. Admins manage everything from a centralized dashboard with role-based access and audit logs. Allthenticator also offers a decentralized credential recovery system, allowing users to back up identities with trusted peers instead of the cloud. Organizations using Allthenticator have reported 94% fewer password resets, 76% less time spent on access management, and up to 96% employee satisfaction

The Teleport Infrastructure Identity Platform modernizes identity, access, and policy for infrastructure, for both human and non-human identities, improving engineering velocity and resiliency of critical infrastructure against human factors and/or compromise. Teleport is purpose-built for infrastructure use cases and implements trusted computing at scale, with unified cryptographic identities for humans, machines and workloads, endpoints, infrastructure assets, and AI agents. Our identity-everywhere approach vertically integrates access management, zero trust networking, identity governance, and identity security into a single platform, eliminating overhead and operational silos.

Protect your company, employees, and customers with simpler and stronger authentication. Deploy 2FA in minutes, not weeks. 2FA (and other user access security policies) built into the fabric of the infrastructure, not rigidly fixed to the applications. Enabling the use of any 2FA methods available on the market now and in the future without changing the core. Protection is available across the entire organization, spanning from on-premise, public and private cloud. Secfense is deployed in between your users and the applications they access. It learns the traffic patterns related to authentication. It can then enforce multi-factor authentication login and other sensitive actions without interfering with the applications existing code or database. Up-to-date 2FA methods are always available on the platform. Application changes don’t affect Secfense and applied methods. Take control over session expiration rules across all apps. Don’t rely on VPNs, base trust on users and their devices.