Lightweight, modern open-source CAPTCHA alternative designed using SHA-256 proof-of-work.
Portugal
EU
Cap Captcha vs reCAPTCHA Comments
- Cap Captcha is Free and Open Source
- Cap Captcha is Customizable, Lightweight and Privacy focused
Self-Hosted reCAPTCHA Alternatives
reCAPTCHA is not available as a self-hosted solution but there are plenty of alternatives for power users and business that want to host a solution on-premise. The best Self-Hosted alternative is Cap Captcha, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 25 alternatives to reCAPTCHA and 12 are available as a self-hosted solution so hopefully you can find a suitable replacement. Other interesting Self-Hosted alternatives to reCAPTCHA are Anubis, ALTCHA, mosparo and mCaptcha.
Alternatives list
49 Anubis alternativesApplies sha256 proof-of-work challenges to incoming HTTP requests, targeting AI crawlers, bots that ignore robots.txt, and automated scrapers, protecting server resources and preventing unwanted search engine indexing for privacy-focused sites.
Cost / License
- Free Personal
- Open Source (MIT)
Application type
Platforms
- Self-Hosted
- Go (Programming Language)
- Docker
Anubis vs reCAPTCHA Comments
Jesus DeboussierI put this on my company page and now my colleagues think I'm into furries
- Anubis is Free Personal and Open Source
- Anubis is Lightweight and Security-focused
20 ALTCHA alternativesALTCHA is a privacy-first solution built to help developers and website owners stop bots, spam, and automated abuse — without making things harder for real users. It replaces traditional CAPTCHA systems with a smarter, quieter approach to verification and threat detection.
ALTCHA vs reCAPTCHA Comments
Jesus DeboussierIts proof of work only - this is a delay mechanism only so I don't know why its in the "stop bots" category?
- ALTCHA is Free and Open Source
- ALTCHA is Privacy focused, Security-focused and Lightweight
mosparo is the modern solution for protecting your online forms from spam. The protection method is quite simple: mosparo blocks spam using rules matching the form’s data. The detection method is comparable to an e-mail spam filter.
+9
mCaptcha vs reCAPTCHA Comments
BiepIt is Free and Open Source. Inspectable.
- mCaptcha is Free and Open Source
- mCaptcha is Privacy focused
21 Private Captcha alternativesPrivate Captcha is an independent, privacy-first, self-hostable Proof-of-Work CAPTCHA service made in EU. Instead of asking users to solve complex puzzles or track their behavior, Private Captcha solves an invisible cryptographic task in the background.
+1
Private Captcha vs reCAPTCHA Comments
It's the only one that has solid backend code (frontend parts all have the same)
It has many pre-built integrations
bogatyrjovGDPR-complisnt and self-hosted.
- Private Captcha is Free Personal and Proprietary
- Private Captcha is Privacy focused and Lightweight
conCaptcha is a self-hosted captcha which is faster, more user-friendly and more customizable than other captchas - available for PHP and ASP.NET websites. Users no longer have to read any annoying text images, solve difficult math equations or play any puzzle games.
Cost / License
- Free
- Open Source (MIT)
Platforms
- Self-Hosted
Cost / License
- Freemium
- Proprietary
Platforms
- Online
- Self-Hosted
- Software as a Service (SaaS)
Cost / License
- Free
- Open Source
Platforms
- Self-Hosted
Cost / License
- Free
- Open Source
Platforms
- Online
- Self-Hosted
Cost / License
- Free
- Proprietary
Platforms
- Self-Hosted
- PHP
Pphpformmailer vs reCAPTCHA Comments
It is not a captcha functionality.
It is not a captcha functionality
P- phpformmailer is Free and Proprietary
Canada
Czechia
Switzerland
India
Estonia
I tried cap captcha on my site and the bots just kept on spamming me.