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Dev tools · September 20, 2018

FusionAuth

Auth for any app. Get every feature. Deploy everywhere.

FusionAuth launched on September 20, 2018 with 120 votes, #264 of 2,635 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 8 years on.

Visit fusionauth.io ↗FusionAuth alternativestop 10% of September 2018

What it does

Auth for any app. FusionAuth's REST API quickly adds registration, login, MFA, SSO, user management, reporting, analytics and more in minutes. Secure, single-tenant, on-prem or private cloud identity, built for developers for easy integration anywhere.

FusionAuth provides complete auth software and user management solutions, with customizable tools like SSO, MFA, and integrations for OAuth2 and OpenID Connect.

FusionAuth secures access for humans, services, and AI across any environment–giving you full control over how identity is deployed, integrated, and scaled. Most CIAM platforms force tradeoffs–between speed and security, convenience and control, growth and cost predictability. FusionAuth is built for teams who don’t want to compromise. Sign up for our Free Community Edition to test drive FusionAuthfrom fusionauth.io

Does a similar job

all alternatives →
  • MonoCloud for StartupsJul 2026 · monocloud.com · ▲167

    One identity layer for your customers, APIs, and agents

  • Auth0 Marketplace2020 · marketplace.auth0.com · ▲107

    Discover and enable identity integrations in minutes

  • Full-stack Auth for React/Node by Wasp2023 · wasp.sh · ▲241

    Free OSS auth without 3rd party services, deploy anywhere

  • PropelAuth2023 · propelauth.com · ▲112

    Flexible auth for B2B products

  • Stack, an open-source Clerk/Firebase Auth alternative2024 · stack-auth.com · ▲144

    Hey HN! Happy to finally launch Stack. We made it because we like to put apps into production quickly, and authentication & user management was taking up way too much time. We have components like and that automatically adapt to whatever theme & design system you're using. Check the blog post to see the example with Radix UI and Joy UI. Also, there's an admin dashboard for monitoring and editing accounts. Stack is 100% AGPL/MIT-licensed, so you can self-host it. Cheers!

  • OI
    OAuth.io released with 70+ providers2013 · oauth.io · ▲66

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