3 Open Source alternatives to Okta in 2026
We compare 3 self-hostable tools you can deploy on your own server in minutes, with license, tech stack and a ready-to-copy docker-compose.
Quick comparison
Sorted by featured first, then GitHub stars as a tiebreaker — the same rule we use across the whole site.
Detailed profile of each alternative
Alternative to Auth0, Okta
Open source SSO and identity management, an alternative to Auth0/Okta.
Alternative to Okta, Auth0
Flexible identity platform, a modern alternative to Okta/Auth0.
Alternative to Auth0, Okta
All-in-one multi-tenant identity, an alternative to Auth0/Okta.
How much does Okta cost, and how much can you save?
Okta charges a recurring monthly fee. Self-hosting the alternative, you only pay for the server — usually a few dollars a month.
Calculate your exact savings in the SaaS Audit →Already know which one you want?
Add Keycloak to the Stack Builder and generate a ready-to-deploy docker-compose.yml, alone or alongside the rest of your stack.
Build my stackFrequently asked questions
Do I need Docker to self-host a Okta alternative?
Yes, for all 3: each one has a ready-to-copy docker-compose.yml. You just need Docker installed on your server.
How much RAM do I need at minimum?
The lightest option on this list is Keycloak, which runs on as little as 256MB of RAM — enough for a cheap VPS.
Are they all 100% free, or are there paid features like on Okta?
2 out of 3 are 100% FOSS. The rest are Open-Core: the core is free and self-hostable, but some advanced feature may stay paid — we call it out on each tool's page.