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, Private Captcha and mosparo.

More about reCAPTCHA
Copy a direct link to this comment to your clipboard
Get a badge for your sitereCAPTCHA alternatives page was last updated

Alternatives list

  1. Cap Captcha icon

    Cap Captcha

     28 likes

    Lightweight, modern open-source CAPTCHA alternative designed using SHA-256 proof-of-work and JS instrumentation

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Self-Hosted
    • Docker
    • PT flagPortugal
    • European Union flagEU
    Cap Captcha screenshot 1
    Good alternative?
     
    |
    1
  2. Anubis icon

    Anubis

     19 likes

    Applies 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.

    57 Anubis alternatives

    Cost / License

    • Free Personal
    • Open Source (MIT)

    Application type

    Platforms

    • Self-Hosted
    • Go (Programming Language)
    • Docker
    • CA flagCanada
    Anubis screenshot 1
    Good alternative?
     
    |
    1
  4. ALTCHA icon

    ALTCHA

     10 likes

    ALTCHA 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.

    25 ALTCHA alternatives

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Platforms

    • Self-Hosted
    • Software as a Service (SaaS)
    • CZ flagCzechia
    • European Union flagEU
    ALTCHA Sentinel - Self-hosted spam protection for websites, apps, and services.
    Good alternative?
     
    |
    1
  5. Private Captcha icon

    Private Captcha

     17 likes

    Private 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.

    Cost / License

    • Free Personal
    • Proprietary

    Application type

    Platforms

    • Online
    • Self-Hosted
    • Docker
    • EE flagEstonia
    • European Union flagEU
    User settings screen to set up API keys
    Good alternative?
     
    |
    3
  6. mosparo icon

    mosparo

     6 likes

    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.

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Platforms

    • Online
    • Self-Hosted
    • Python
    • JavaScript
    • Drupal
    • Django
    • PHP
    • Mautic
    • Wordpress
    • CH flagSwitzerland
    A screenshot from the software mosparo with the empty project list.
    Good alternative?
     
  8. mCaptcha icon

    mCaptcha

     4 likes

    A no-nonsense CAPTCHA system with seamless UX | Backend component.

    Cost / License

    Application type

    Platforms

    • Online
    • Self-Hosted
    • Software as a Service (SaaS)
    • IN flagIndia
    mCaptcha screenshot 1
    Good alternative?
     
    |
    1
  9. IconCaptcha icon

    IconCaptcha

     Like

    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
    IconCaptcha screenshot 1
    Good alternative?
     
  10. InputGuard icon

    InputGuard

     1 like

    InputGuard is the privacy friendly alternative to reCAPTCHA or other captcha tools.

    Cost / License

    • Freemium
    • Proprietary

    Platforms

    • Online
    • Self-Hosted
    • Software as a Service (SaaS)
    Good alternative?
     
  11. EU Captcha icon

    EU Captcha

     Like

    Multilingual captcha developed by and for EU countries.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Self-Hosted
    Good alternative?
     
  12. UniqPin icon

    UniqPin

     3 likes

    UniqPin is a free for non-commercial use service which destiny improve ability of interfaces detect a human or a computer operate with it.

    Cost / License

    • Free Personal
    • Proprietary

    Application type

    Platforms

    • Self-Hosted
    • JavaScript
    • PHP
    UniqPin screenshot 1
    Good alternative?
     
  13. Captcheck icon

    Captcheck

     Like

    Open source reCAPTCHA alternative.

    Cost / License

    • Free
    • Open Source

    Platforms

    • Online
    • Self-Hosted
    Image mode
    Good alternative?
     
  14. P

    phpformmailer

     Like

    Easy to use - Nothing stupid your visitors have to type before the form submits.

    Cost / License

    • Free
    • Proprietary

    Platforms

    • Self-Hosted
    • PHP
    Good alternative?
     
    |
    2
12 of 12 reCAPTCHA alternatives