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Top 5 open-source products relevant to SPAM Protection and Captcha

  1. the modern spam protection.

    Open Source

    /mosparo-alternatives

  2. ALTCHA is a free CAPTCHA alternative that uses a proof-of-work mechanism to protect your website, and online services from spam.

    Open Source free

    /altcha-alternatives

  3. Leverage the complexity of the human eye to beat bots in a way no other CAPTCHA can. Keep your privacy. Secure your Site. Enhance your User Experience.

    Open Source freemium £15.0 / Monthly (Tier 1, up to 1,000 queries)

    /cybersiara-alternatives

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

    Open Source

    /cap-captcha-alternatives

  5. Independent, privacy-first, self-hostable CAPTCHA service made in EU.

    Open Source paid Free Trial €12.0 / Annually

    /private-captcha-alternatives

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