Private Captcha
Private Captcha is a privacy-first, GDPR-compliant CAPTCHA that blocks bots with an invisible background challenge, without annoying users.
Description
Private Captcha is a privacy-first, GDPR-compliant CAPTCHA service designed to protect web forms and APIs from bots and abuse without disrupting user experience. Unlike traditional CAPTCHAs, it uses an invisible cryptographic proof-of-work challenge that runs in the background while users fill out forms, eliminating annoying puzzles. The service is built and hosted in the EU, ensuring strict compliance with GDPR, and is self-hostable for full data control. It offers easy integration with popular platforms (WordPress, React, PHP, etc.), a stable API, and real human support. Pricing is affordable and transparent, with all tiers including features like automatic difficulty scaling, audit logs, and EU-only endpoints.
Features
Invisible cryptographic proof-of-work challenge runs in the background while users fill forms, making it seamless and accessible. Built for GDPR compliance: no collection of PII, EU-only suppliers, and optional self-hosting. Easy integration via plug-and-play widget code and ready integrations for WordPress, React, JavaScript, .NET, Go, Ruby, PHP, Java, Python, and more. Stable, backward-compatible API with a promise that integrations won't break. Automatic difficulty scaling adjusts challenge complexity in real time based on risk. Comprehensive features: audit logs, Platform API, form forwarding, usage statistics, widget customization, and invisible mode. All source code is publicly available on GitHub for transparency and self-hosting.
Benefits
Protects forms and APIs from bot abuse without degrading user experience. Privacy-first design ensures no end-user PII is collected, aligning with GDPR and other privacy regulations. More affordable than other CAPTCHAs: all features included in every tier, no expensive enterprise upsells. EU-based hosting and support provide legal confidence for European businesses. Unaffected by AI-based bypasses since it uses cryptographic tasks, not image recognition. Accessible and user-friendly: no puzzles or behavior tracking, reducing friction for real users.