A privacy-first, self-hosted CAPTCHA alternative that verifies users with background proof-of-work and instrumentation challenges instead of puzzles.
altcha-org/altcha
Self-hosted, cookie-free CAPTCHA alternative that uses a proof-of-work challenge to block spam and bots, with WCAG 2.2 AA accessibility.
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- 未解決の Issue
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- 最終コミット
- 11 時間前
主な機能
- 01Background proof-of-work challenge that avoids visual puzzles.
- 02Cookie-free and fingerprint-free, with no tracking.
- 03Argon2id and Scrypt algorithms that resist ASIC and GPU acceleration.
- 04Image code-challenge fallback with audio support.
- 05Multiple display modes and themes for the widget.
- 06Server libraries in many languages and framework starter templates.
ユースケース
- Protecting contact, signup and login forms from spam bots without tracking users.
- Adding bot and abuse protection to APIs or comment systems while meeting GDPR and accessibility requirements.
- Running a fully self-hosted anti-spam layer with no dependency on third-party CAPTCHA services.
トピック
よくある質問
- altcha とは?
- Self-hosted, cookie-free CAPTCHA alternative that uses a proof-of-work challenge to block spam and bots, with WCAG 2.2 AA accessibility.
- altcha は無料で使えますか?ライセンスは?
- altcha は MIT ライセンスのオープンソースです。商用製品で使う前にライセンス条件を確認してください。
- altcha は今もメンテナンスされていますか?
- 活発にメンテナンス中。altcha の最終コミットは 2026年10月19日 です。
- altcha は何に使えますか?
- Protecting contact, signup and login forms from spam bots without tracking users. Adding bot and abuse protection to APIs or comment systems while meeting GDPR and accessibility requirements. Running a fully self-hosted anti-spam layer with no dependency on third-party CAPTCHA services.
- altcha はどこで入手できますか?
- ソースコードとインストール手順は GitHub にあります:https://github.com/altcha-org/altcha
概要はプロジェクトの README をもとに AI が生成しています。GitHub の数値は毎日更新されます。
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