# Free alternatives to Auth0

> Auth0 (B2C Essentials) costs $420 a year. Free alternatives: Keycloak and authentik. Data checked 2026-10-17.

- Page: https://stoprenting.dev/apps/auth0/
- Category: Developer Tools (https://stoprenting.dev/categories/developer-tools/)
- Vendor: Okta
- Plan: B2C Essentials
- Price: $35/month, $420/year
- Billing: monthly (starting tier)
- Price quote from the vendor's page: "Essentials $ 35 / month"
- Price source: https://auth0.com/pricing (checked 2026-10-17)

## Alternatives

### Keycloak

- Website: https://www.keycloak.org
- Repository: https://github.com/keycloak/keycloak (37,334 stars, last push 2026-10-14)
- License: Apache-2.0
- Open source: yes, OSI-approved license
- Type: server app
- Linux: self-hosted server; web UI
- Self-hostable: yes
- More: https://stoprenting.dev/alternatives/keycloak/
- Checked: 2026-10-17

### authentik

- Website: https://goauthentik.io
- Repository: https://github.com/goauthentik/authentik (25,932 stars, last push 2026-10-12)
- License: MIT (enterprise/ proprietary)
- Open source: yes, OSI-approved license
- Type: server app
- Linux: self-hosted server; web UI
- Self-hostable: yes
- More: https://stoprenting.dev/alternatives/authentik/
- Checked: 2026-10-17

## FAQ

### Is there a free alternative to Auth0?

Yes. The 2 free alternatives are Keycloak (open source, Apache-2.0) and authentik (open source, MIT).

### How much does Auth0 cost?

Auth0's B2C Essentials plan costs $35 a month, which is $420 a year (monthly (starting tier)). Source: the official pricing page at auth0.com, checked Oct 17, 2026.

### Which Auth0 alternatives run on Linux?

Keycloak (self-hosted server; web UI) and authentik (self-hosted server; web UI).

### Can you self-host a Auth0 alternative?

Yes. Keycloak and authentik run on your own server.

### Are these Auth0 alternatives open source?

Yes. All 2 use OSI-approved open-source licenses: Keycloak (Apache-2.0) and authentik (MIT).

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Source: Stop Renting (https://stoprenting.dev). Methodology: https://stoprenting.dev/methodology/