A self-hosted, privacy-first CAPTCHA alternative that replaces puzzles with background proof-of-work and instrumentation challenges.
8.1K622JavaScriptOtherUpdated 6 days ago
2 alternatives
Best open-source alternatives to reCAPTCHA (2026)
Looking for a free, open-source alternative to reCAPTCHA? These 2 projects can replace it. Each one is reviewed by a human and explained in plain words, so you can compare stars, license and maintenance at a glance.
Quick comparison
| Project | Stars | License | Last commit |
|---|---|---|---|
| tiagozip/cap | ★ 8.1K | Other | 6 days ago |
| altcha-org/altcha | ★ 2.8K | MIT | 4 hours ago |
Self-hosted, cookie-free CAPTCHA alternative that uses a proof-of-work challenge to block spam and bots, with WCAG 2.2 AA accessibility.
2.8K142TypeScriptMITUpdated 4 hours ago
FAQ
- Is there a free, open-source alternative to reCAPTCHA?
- Yes. The most popular open-source alternatives to reCAPTCHA on Repolode are cap, altcha.
- Which reCAPTCHA alternative should I choose?
- cap has the most GitHub stars and is released under Other. Compare the license and last commit of each option in the table above before choosing.