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Ory Kratos

★ 12k

API-first identity server for login, registration, MFA, and account recovery flows.

Ory Kratos does the job of Auth0, self-hosted. It is Apache-2.0-licensed, so you can do essentially what you like with it, and setting it up is an afternoon, not a weekend. Auth0 bills $35 for it. 12k stars on GitHub.

Open-source replacement for Auth0.

Licence
Apache-2.0
Self-hosting
Medium
The paid one costs
$35
GitHub stars
12k
view the code →official site →

Is it actually a replacement?

We have written a verdict on what it replaces — what you lose, and why people still pay:

How Ory Kratos runs

Where it runs

Ory Kratos runs on your server.

What setup takes

not verified by us yet — check the repo README.

Ory Kratos questions

Is Ory Kratos open source?

Yes — it is released under Apache-2.0.

Can Ory Kratos replace Auth0?

Our verdict on Auth0 is YES. Keycloak (28k stars), Better Auth (20k stars), Authentik (17k stars) are mature open-source replacements for Auth0 — self-host with real ops work and stop paying $70/mo.

Can I self-host Ory Kratos?

Yes — we rate it medium to self-host, and it runs on your server.

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