# keycloak vs mCaptcha

> Two self-hosted projects, compared on the numbers selfhost.directory tracks live: score, popularity, release cadence and setup effort.

| | keycloak | mCaptcha |
|---|---|---|
| Score | 86/100 ✓ | 55/100 |
| Rank in category | #1 of 40 in Authentication | #32 of 78 in Security |
| GitHub stars | 37 589 ✓ | 2 498 |
| Stars, last 30 days | +608 ✓ | +5 |
| Stable releases, 12 months | 14 ✓ | 0 |
| Latest release | 26.8.1 · 13 Oct 2026 | — |
| Setup | Moderate ✓ | Moderate |
| Official Docker image | Yes | Yes |
| License | Apache-2.0 | AGPL-3.0 |
| Main language | Java | Rust |

## Which one should you pick?

keycloak scores 86/100 against 55/100 for mCaptcha, so it is the safer default.

keycloak ships more often: 14 stable releases in the past year, against 0 for mCaptcha.

keycloak is growing faster right now (+608 stars in 30 days).

## Details

- [keycloak](https://selfhost.directory/project/keycloak) (markdown: https://selfhost.directory/project/keycloak.md)
- [mCaptcha](https://selfhost.directory/project/mcaptcha) (markdown: https://selfhost.directory/project/mcaptcha.md)

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Source: https://selfhost.directory/compare/keycloak-vs-mcaptcha