Cloudflare Turnstile Alternatives

Cloudflare Turnstile is described as 'Turnstile is Cloudflare's smart CAPTCHA alternative. It automatically chooses from a rotating suite of non-intrusive browser challenges based on telemetry and client behavior exhibited during a session' and is an app. There are more than 10 alternatives to Cloudflare Turnstile for a variety of platforms, including Web-based, Self-Hosted, SaaS, Wordpress and Docker apps. The best Cloudflare Turnstile alternative is Cap Captcha, which is both free and Open Source. Other great apps like Cloudflare Turnstile are Anubis, reCAPTCHA, Procaptcha and Private Captcha.

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Alternatives list

  1. Cap Captcha icon

    Cap Captcha

     25 likes

    Lightweight, modern open-source CAPTCHA alternative designed using SHA-256 proof-of-work.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Self-Hosted
    • Docker
    Cap Captcha screenshot 1
     
  2. Anubis icon

    Anubis

     16 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.

    48 Anubis alternatives

    Cost / License

    • Free Personal
    • Open Source (MIT)

    Application type

    Platforms

    • Self-Hosted
    • Go (Programming Language)
    • Docker
    Anubis screenshot 1
     
  4. reCAPTCHA icon

    reCAPTCHA

     127 likes

    reCAPTCHA is a free service that protects your site from spam and abuse, using risk analysis techniques to tell humans and bots apart.

    28 reCAPTCHA alternatives

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Online
    reCAPTCHA screenshot 1
     
  5. Procaptcha icon

    Procaptcha

     14 likes

    Prosopo Procaptcha redefines user verification with a unique approach that emphasizes privacy and security. It's a pioneering solution designed to offer an alternative to conventional CAPTCHA systems that often compromise user privacy.

    29 Procaptcha alternatives

    Cost / License

    Application type

    Platforms

    • Online
    • Software as a Service (SaaS)
    • Wordpress
    Procaptcha screenshot 1
     
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    1
    Procaptcha vs Cloudflare Turnstile Comments
    paul_loubert
    Positive
    0

    Turnstile was being easily bypassed by the various solvers available on GitHub. Procaptcha stopped these bots from getting through.

    Review by a new / low-activity user.
    • Procaptcha is Freemium and Open SourceCloudflare Turnstile is Free and Proprietary
    • Procaptcha is Privacy focusedCloudflare Turnstile is not according to our users
  6. Private Captcha icon

    Private Captcha

     16 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.

    19 Private Captcha alternatives

    Cost / License

    • Free Personal
    • Proprietary

    Application type

    Platforms

    • Online
    • Self-Hosted
    • Docker
    Internal portal screenshot
     
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    1
    Private Captcha vs Cloudflare Turnstile Comments
    loginoff
    Positive
    0

    Simple and self-hostable solution with full source available

    • Private Captcha is Free Personal and ProprietaryCloudflare Turnstile is Free and Proprietary
    • Private Captcha is Privacy focused and LightweightCloudflare Turnstile is not according to our users
  7. hCaptcha icon

    hCaptcha

     13 likes

    hCaptcha is designed to solve the most labor intensive problem in machine learning: labeling massive amounts of data in a timely, affordable, and reliable way.

    31 hCaptcha alternatives

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Online
    hCaptcha screenshot 1
     
  9. ALTCHA icon

    ALTCHA

     8 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.

    18 ALTCHA alternatives

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Platforms

    • Self-Hosted
    • Software as a Service (SaaS)
    ALTCHA Sentinel - Self-hosted spam protection for websites, apps, and services.
     
  10. IronWall icon

    IronWall

     1 like

    IronWall is a Proof-of-Work (PoW) rate-limiting protocol designed to protect high-value API endpoints (AI generation, Auth, SMS triggers) from automated abuse.

    Cost / License

    • Freemium
    • Open Source (MIT)

    Platforms

    • Online
    • Software as a Service (SaaS)
    IronWall screenshot 1
     
  11. mCaptcha icon

    mCaptcha

     4 likes

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

    30 mCaptcha alternatives

    Cost / License

    Application type

    Platforms

    • Online
    • Self-Hosted
    • Software as a Service (SaaS)
    mCaptcha screenshot 1
     
  12. mosparo icon

    mosparo

     5 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.

    25 mosparo alternatives

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Platforms

    • Online
    • Self-Hosted
    • Python
    • JavaScript
    • Drupal
    • Django
    • PHP
    • Mautic
    • Wordpress
    A screenshot from the software mosparo with the empty project list.
     
  13. Friendly Captcha icon

    Friendly Captcha

     10 likes

    Friendly Captcha is a tool for preventing spam on your website.

    24 Friendly Captcha alternatives

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Online
    • Software as a Service (SaaS)
    Friendly Captcha screenshot 1
     
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    1
    Friendly Captcha vs Cloudflare Turnstile Comments
    Guest
    Positive
    0

    In contrast to Cloudflare Turnstile, Friendly Captcha offers universal browser support and doesn't block users with older browser or devices. Cloudflare still requires user interaction with the Captcha whenever a user seems to be suspicious. That's not invisible at all, and an accessibility challenge.

    Review by a new / low-activity user.
    • Friendly Captcha is Freemium and ProprietaryCloudflare Turnstile is Free and Proprietary
    • Friendly Captcha is Privacy focusedCloudflare Turnstile is not according to our users
  14. TrustCaptcha icon

    TrustCaptcha

     2 likes

    TrustCaptcha is a privacy-first, invisible CAPTCHA that protects your website from bots and spam—without disrupting your users.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Online
    • Spring
    • Kotlin
    • Rust
    • Ruby
    • Python
    • .NET Framework
    • Craft CMS
    • React
    • Groovy
    • JavaScript
    • Angular
    • Software as a Service (SaaS)
    • Scala
    • PHP
    • Go (Programming Language)
    • Typescript
    • Java
    • Wordpress
    • Node.JS
    • Vue.js
    Contact Form Sample
     
12 of 19 Cloudflare Turnstile alternatives