Open-source alternatives to Auth0

5 alternatives, ranked by a published maintenance score computed from live GitHub signals (fetched 2026-09-04). We flag unmaintained projects on both sides — including Auth0 itself when the data says so.

About Auth0: Proprietary SaaS (Okta); per-active-user pricing grows sharply past the free tier. It is closed-source, so the same public maintenance signals do not exist for it — we score only the alternatives below.

The alternatives

Keycloak

90 /100 actively maintained

The enterprise-grade open identity server: SSO, OIDC, SAML.

36,600 stars · last commit 2026-09-04 · latest release nightly (2026-09-02) · 3,237 open issues/PRs · Apache-2.0 · fetched 2026-09-04

How this 90/100 was computed

Last commit	today	40/40
Latest release	2 days ago	25/25
Community size	GitHub stars	15/15
Open-issue trend	not enough history yet — needs snapshots 21+ days apart; neutral 10/20 awarded meanwhile	10/20
Total		90/100

authentik

90 /100 actively maintained

Modern self-hosted identity provider with flexible flows.

25,349 stars · last commit 2026-09-04 · latest release version/2026.8.1 (2026-09-01) · 1,087 open issues/PRs · custom license · fetched 2026-09-04

How this 90/100 was computed

Last commit	today	40/40
Latest release	3 days ago	25/25
Community size	GitHub stars	15/15
Open-issue trend	not enough history yet — needs snapshots 21+ days apart; neutral 10/20 awarded meanwhile	10/20
Total		90/100

ZITADEL

87 /100 actively maintained

Multi-tenant identity platform in Go.

14,937 stars · last commit 2026-09-04 · latest release v4.17.3 (2026-09-04) · 1,155 open issues/PRs · AGPL-3.0 · fetched 2026-09-04

How this 87/100 was computed

Last commit	today	40/40
Latest release	today	25/25
Community size	GitHub stars	12/15
Open-issue trend	not enough history yet — needs snapshots 21+ days apart; neutral 10/20 awarded meanwhile	10/20
Total		87/100

SuperTokens

87 /100 actively maintained

Drop-in auth with prebuilt UIs; self-hostable core.

15,293 stars · last commit 2026-09-04 · latest release v12.1.1 (2026-08-13) · 142 open issues/PRs · custom license · fetched 2026-09-04

How this 87/100 was computed

Last commit	today	40/40
Latest release	22 days ago	25/25
Community size	GitHub stars	12/15
Open-issue trend	not enough history yet — needs snapshots 21+ days apart; neutral 10/20 awarded meanwhile	10/20
Total		87/100

Ory Kratos

73 /100 maintained

API-first identity and user management, headless by design.

13,864 stars · last commit 2026-07-29 · latest release v26.2.0 (2026-03-20) · 222 open issues/PRs · Apache-2.0 · fetched 2026-09-04

How this 73/100 was computed

Last commit	37 days ago	32/40
Latest release	5 months ago	19/25
Community size	GitHub stars	12/15
Open-issue trend	not enough history yet — needs snapshots 21+ days apart; neutral 10/20 awarded meanwhile	10/20
Total		73/100