Compare the Top Free Authentication Software as of December 2025

What is Free Authentication Software?

Authentication software verifies the identity of users or devices before granting access to systems, applications, or data, ensuring security and preventing unauthorized access. It supports various methods such as passwords, biometrics, multi-factor authentication (MFA), token-based authentication, and single sign-on (SSO) to provide flexible and robust identity verification. The software integrates with identity management systems and security frameworks to enforce access policies and monitor authentication events. By enhancing security and user experience, authentication software is critical for protecting sensitive information in industries like finance, healthcare, and government. It helps organizations comply with regulatory requirements and reduce the risk of breaches. Compare and read user reviews of the best Free Authentication software currently available using the table below. This list is updated regularly.

  • 1
    Auth0

    Auth0

    Okta

    Auth0 takes a modern approach to Identity, providing secure access to any application, for any user. Safeguarding billions of login transactions each month, Auth0 delivers convenience, privacy, and security so customers can focus on innovation. Auth0 is part of Okta, The World’s Identity Company™. Auth0 lets you quickly integrate authentication and authorization for web, mobile, and legacy applications, with new Fine Grained Authorization (FGA) that goes beyond role-based access control. Authenticate users across all applications with a customized, secure, and standards-based single login. Universal Login connects users to a central authorization server. Credentials aren’t transferred across sources, which boosts security and protects against phishing and credential stuffing attacks. OAuth 2.0 recommends that only external user agents (like the browser) be used by native applications for authentication flows. Auth0’s Universal Login achieves this while enabling SSO.
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    Starting Price: Free plan
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  • 2
    FusionAuth

    FusionAuth

    FusionAuth

    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.
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    Starting Price: $0
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  • 3
    MIRACL

    MIRACL

    MIRACL

    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.
  • 4
    GateKeeper Enterprise

    GateKeeper Enterprise

    Untethered Labs, Inc.

    Passwordless, proximity login to PCs, Macs, websites, and desktop applications. Hands-free, wireless 2FA and password manager through active proximity-detection. IT admins can dynamically allow users to log in to their computers and websites with a physical key either automatically, by touch, by pressing Enter, or with a PIN. Seamlessly login, switch users, switch computers, and logout without passwords, touch, or trouble - just a key. Once a user walks away, the computer will lock, blocking access to the computer and web passwords. With continuous authentication, users are always being checked to ensure that they require access. No more typing passwords. Admins and compliance can now automate password security from a central admin console: enforce stronger passwords, enforce 2FA, and give employees the power of password-free login without interrupting workflow. Reduce helpdesk tickets related to forgotten passwords/password resets. Login and auto-lock with proximity.
    Starting Price: $3/user/month
  • 5
    Cisco Duo
    Cisco Duo is a cloud-based identity security solution that protects organizations from identity-based threats and boosts workforce productivity. Trusted by over 40,000 organizations worldwide, Duo delivers an exceptional access management experience across all users, devices, and applications, making access to resources secure, seamless, and easy. Duo with Cisco Identity Intelligence provides deep visibility across your identity ecosystem, adding a powerful security layer to any identity infrastructure. Offer users a world-class access experience through Duo Passport to eliminate MFA friction and fatigue without sacrificing security. To stop threats, Duo verifies user identities with strong authenticators including Duo passwordless, Verified Duo Push with number matching, and phishing-resistant factors like biometrics and FIDO2 security keys. Paired with deep insights into users’ devices, Duo gives you the control to adaptively limit access based on device health or user risk.
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    Starting Price: $3 per user per month
  • 6
    Quicklaunch

    Quicklaunch

    Quicklaunch

    QuickLaunch is the #1 leader in Identity and Access Management (IAM) for Higher Education. More than 500 organizations trust QuickLaunch’s platform to manage over 2,000,000 identities and integrate over 3,000 applications worldwide. CIOs, CTOs, and CISOs use QuickLaunch IAM technologies to engage with students, faculty, and staff and protect them throughout their journey. QuickLaunch’s technology is vital in protecting the user experience, driving both operational efficiencies and higher productivity for colleges, universities, and institutions. Improves cyber security posture by protecting user accounts from being hacked and thwarting ransomware and phishing cyber attacks. Automatically provisions students from the Student Information System and employees from the Human Resources system so they can quickly get access to the apps they need when they matriculate and join.
    Starting Price: $0.73 per month
  • 7
    OneLogin

    OneLogin

    OneLogin

    Secure critical company information and empower employees with OneLogin, a trusted identity and access management (IAM) solution for the modern enterprise. Designed to strengthen enterprise security while simplifying business logins, OneLogin is an excellent solution for companies looking to enforce security policies with ease. OneLogin includes top-rated features such as single sign-on (SS), unified directory, user provisioning, adaptive authentication, mobile identitiy, compliance reporting, and more.
  • 8
    OpenIAM

    OpenIAM

    OpenIAM

    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.
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    LoginTC

    LoginTC

    Cyphercor

    Cyphercor is a two factor authentication provider that offers a best-in-class solution that's effortless, intuitive, and cost-effective called "LoginTC". LoginTC adds an additional layer of security to your systems and applications including VPNs, Firewalls, remote desktop, active directory, and more with it's innovative 2fa software. LoginTC offers a wide range of two factor options for end-users to authenticate, including SMS, email, push notifications, hardware tokens, U2F, OTP, bypass codes, and more. LoginTC was built with the principle that administrators are users too, and offers a solution that's not just easy for end users day-to-day, but is also simple for administrators to manage and setup. In fact, if you aren't set-up in one hour, the first month of your subscription is on us. LoginTC can help you reduce your insurance costs and meet compliance regulations with ease.
    Starting Price: $3/month/user
  • 10
    OpenOTP Security Suite
    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)
    Starting Price: €1.85/User/M
  • 11
    WSO2 Identity Server
    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
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