Skip to main content
FA
FreeToolAlt.dev

Save money without sacrificing quality

GitHub
Back to all tools
Paid Tool$199/mo$0 → $199Security3 Free Alternatives
↑ 0%Switching away from FusionAuth? Read the migration guide →
Price Increase — FusionAuth went from $0 to $199 (5 days ago). Now is a great time to switch to one of the 3 free alternatives below.

Free Alternatives to FusionAuth

Why pay for FusionAuth? Here are 3 free and open-source alternatives that deliver similar or better functionality.

Share this page:

Choosing a free security alternative to FusionAuth

FusionAuth is commonly evaluated by security teams and independent creators looking for a capable workflow. This directory compares 3 alternatives so you can review features, pricing context, maintenance signals, and the practical trade-offs before switching.

The latest pricing information for FusionAuth is $199/mo according to the latest directory review. The listed alternatives include Keycloak, Gluu, OAuth2 Server. Availability and feature limits can change, so review the official project page before moving production work or sensitive data.

Start with the option that best matches your required workflow, operating system, collaboration needs, and migration budget. Open-source tools may require more setup, while hosted free plans can impose limits on storage, usage, or team members.

Last verified

2026-09-14

Working links

3 of 3 checked

Community signal

Community data pending

Quick Verdict

Keycloak and 2 other free alternatives provide similar functionality to FusionAuth without the $199/monthly. Perfect for individuals and teams looking to reduce software costs while maintaining productivity.

Who should use these free alternatives?

Perfect For

  • ✓Individual users and small teams
  • ✓Developers and creators on a budget
  • ✓Privacy-conscious professionals
  • ✓Anyone looking to reduce software costs

Consider Limitations

  • !Large enterprises requiring vendor support contracts
  • !Teams needing guaranteed uptime SLAs
  • !Organizations with complex compliance needs
  • !Users requiring extensive third-party integrations

Recommended Free Alternatives

Best Overall
1
Free
Keycloak logo

Keycloak

Last checked Sep 2026

An open source identity and access management solution — actively maintained by an open-source community and free for both personal and commercial use Positioned as a popular alternative to FusionAuth, offering comparable core features at zero cost.

Try Keycloak Free

No credit card required

2
Free
Gluu logo

Gluu

Last checked Sep 2026

A free open source identity and access management platform — actively maintained by an open-source community and free for both personal and commercial use Positioned as a popular alternative to FusionAuth, offering comparable core features at zero cost.

Try Gluu Free

No credit card required

3
Free
OAuth2 Server logo

OAuth2 Server

Last checked Sep 2026

A free and open source OAuth 2.0 server implementation — with generous free-tier limits covering most personal and small-team projects Positioned as a popular alternative to FusionAuth, offering comparable core features at zero cost.

Try OAuth2 Server Free

No credit card required

You might also like...

Clerk logo

Clerk

Security3 alternatives
ApiFortress logo

ApiFortress

Security3 alternatives
Clerk.dev logo

Clerk.dev

Security3 alternatives

Frequently Asked Questions

What are the best free alternatives to FusionAuth?
The best free alternatives to FusionAuth include Keycloak, Gluu, OAuth2 Server. All alternatives are verified as genuinely free (not freemium or free trials) and are actively maintained by the open-source community.
Is FusionAuth worth paying for in 2026?
That depends on your specific needs. FusionAuth offers premium features and polished UX, but for most users, the free alternatives listed on this page provide comparable functionality at $0. We recommend trying the free options first before committing to a paid subscription.
Are these FusionAuth alternatives really free?
Yes. Every alternative listed has been verified as genuinely free. Many are open-source (MIT, Apache, or GPL licensed), meaning you can use them commercially without restrictions. Some offer optional paid tiers for enterprise features, but the core functionality is always free.
How often are these alternatives updated?
Our directory is updated daily by an AI-powered system that discovers new tools, checks existing ones, and verifies that URLs are still active. Each alternative shows a "Last checked" date indicating when it was last reviewed. Star counts for GitHub-hosted alternatives are refreshed every day.
Can I use these free security tools commercially?
Most of the alternatives listed can be used commercially. Open-source tools with permissive licenses (MIT, Apache 2.0, BSD) have no restrictions on commercial use. Tools with copyleft licenses (GPL) may require you to open-source derivative works. Always check each tool's individual license before deploying in production.

Was this helpful?

Found these alternatives useful?

Explore more free alternatives to other popular paid tools.

Browse All Tools