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List of the Top 1 On-Prem CAPTCHA Software in 2025

Reviews and comparisons of the top On-Prem CAPTCHA software


Here’s a list of the best On-Prem CAPTCHA software. Use the tool below to explore and compare the leading On-Prem CAPTCHA software. Filter the results based on user ratings, pricing, features, platform, region, support, and other criteria to find the best option for you.
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    ALTCHA Reviews & Ratings

    ALTCHA

    BAU Software s.r.o.

    Protect your website effortlessly with innovative spam defense.
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    ALTCHA serves as an alternative to traditional CAPTCHAs by employing a proof-of-work system to safeguard websites and online services from spam. By utilizing this proof-of-work method, ALTCHA effectively shields your website, online services, and APIs from spam and undesirable content. What sets ALTCHA apart is its open-source nature, allowing users to self-host it at no cost. Additionally, it operates independently of external services and avoids the use of fingerprinting or cookies, ensuring privacy and security for users. This makes ALTCHA a reliable solution for maintaining the integrity of online platforms.
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