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description=ALTCHA is a next-gen Captcha and bot protection solution for websites and apps, designed for privacy, accessibility, and compliance.;
keywords=altcha, captcha, recaptcha, hcaptcha, antispam, protection, spam-filter;

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Text of the page (random words):
privacy first captcha and bot protection altcha skip to content altcha search ctrl k cancel cloud playground docs api reference select theme dark light auto select language english deutsch español français italiano português gdpr compliant captcha and bot protection secure your data and users with the privacy first alternative to recaptcha altcha eliminates tracking cookies and fingerprinting delivering a robust accessible and globally compliant security without a single puzzle 100 self hosted no external calls no data sharing get started for enterprises discover the new altcha cloud start free trial privacy first bot protection for your website hosted in the eu get advanced protection real time threat intelligence and a frictionless experience for legitimate users with a 30 day free trial learn more integrate pricing self hosted altcha sentinel complete on premise bot and spam protection giving you full control across websites apps and services v1 37 0 aug 25 2026 documentation start with a free 30 day trial aws azure kubernetes docker altcha sentinel is a next generation security system that stops bots and automated threats without frustrating real users it intelligently adapts to risks blending advanced detection with seamless verification to keep your apps and services protected sentinel works quietly in the background using threat intelligence machine learning and pattern recognition to block abuse whether you re defending sign ups forms or apis it delivers robust security while maintaining a smooth and accessible experience for legitimate traffic postgresql mysql microsoft sql server oracle altcha for wordpress next gen spam protection seamless integration and privacy first security designed and built for website owners who want reliable invisible protection that doesn t frustrate visitor and works without external services unlimited verifications no external services no data sharing blocks spam instantly without bothering visitors firewall and rate limiting built to handle high traffic sites learn more install plugin new v3 captcha with global compliance and universal accessibility altcha is a self hosted solution that ensures compliance with data protection and accessibility regulations worldwide about compliance gdpr compliant with the general data protection regulation hipaa compliant with the health insurance portability and accountability act ccpa compliant with the california consumer privacy act pipeda cppa compliant with the canadian consumer privacy protection act lgpd compliant with the brazilian general data protection law dpdpa compliant with india s digital personal data protection act pipl compliant with the personal information protection law of the people s republic of china wcag adhering to the wcag 2 2 guidelines for aa level compliance european accessibility act fully compliant with wcag 2 2 level aa meeting all accessibility requirements under the european accessibility act 2025 eaa internationalization i18n internationalization with support for over 50 languages including rtl right to left support adaptive bot protection altcha sentinel delivers automated adaptive bot protection that dynamically responds to emerging threats frictionless captcha the system defaults to a proof of work pow verification method eliminating visual puzzles or disruptive challenges this approach balances security with accessibility offering an unobtrusive captcha solution suitable for most users code captcha for cases flagged as high risk the protection escalates to a secure code challenge this includes an audio component ensuring adherence to accessibility regulations like eaa and wcag without compromising security this is a demonstration of captcha showing only the user interface without full functionality additional integration options invisible captcha floating ui captcha and overlay ui captcha understandable and inclusive altcha speaks your language literally with multilingual audio code challenges automatic translations and rtl support altcha delivers a seamless captcha experience in 50 languages for everyone bundle size smaller bundle size means faster load times altcha 34 kb cf turnstile 85 kb hcaptcha 250 kb recaptcha 300 kb assets are gzipped and minified altcha with all 50 languages included totals 52 kb load time faster load time means a better user experience altcha 0 ms cf turnstile 300 ms hcaptcha 550 ms recaptcha 1 000 ms how does altcha load instantly by bundling the altcha widget directly into your website s code using tools like vite or webpack altcha is available as a javascript npm package the sentinel advantage security compliance and performance all in one solution secure block bots spam and malicious traffic before it reaches your systems sentinel keeps your websites apps and services safe with on premise protection you fully control comply meet data protection and privacy requirements with a solution that never leaks sensitive information to third parties stay aligned with gdpr and enterprise compliance standards optimize reduce noise improve performance and focus on real users with spam filtered at the source your analytics workflows and support channels stay accurate and efficient multi layered protection altcha sentinel applies multi layered detection to stop bots in real time human interaction signature his analyzes user interaction behavior to estimate automation probability and prevent replay of human like interactions during verification adaptive captcha distinguishes real users from bots using an accessible frictionless captcha that adapts to each interaction threat intelligence analyzes ip addresses against databases of known abusers detects phishing urls and dynamically learns from your own user activity input data analysis detects harmful content spam and phishing links in submitted data allowing only legitimate and safe input through rate limiting controls the frequency of interactions using configurable thresholds to prevent abuse brute force attempts and ddos attacks use cases self hosted machine learning powered defense against spam bots and automated attacks user registration protection block fake sign ups and bot created accounts with challenge based verification login auth protection defend against credential stuffing and brute force attacks on logins secure form submissions stop bots in contact forms surveys and submissions without hurting user experience chat forum moderation filter spam in discussions and forums reducing moderation work threat detection block malicious bot traffic across web services and apis to stop data scraping service overload and unauthorized access email spam filter keep spam and phishing attempts out of your email ingress beyond captchas altcha sentinel is packed with security features that help you protect your apps and services adaptive captcha adjusts difficulty based on user behavior to block bots effectively text classifier analyzes and categorizes text inputs for malicious content training data uses machine learning datasets to improve spam detection bot detection identifies and blocks automated bots crawlers and ai agents proxy tor detection flags requests from proxy servers or tor networks email verification validates email addresses to reduce fake sign ups rate limiter prevents abuse by limiting requests from a single source threat intelligence automatically detects and blocks malicious ips and phishing urls ip geo fencing restricts access based on geographic location of ip addresses language detection identifies and filters content based on detected languages form submissions secures form submissions against bots and automated attacks links and redirects protect any url with a verification page before redirecting users to the destination trusted by institutions and businesses worldwide enterprise government solutions altcha provides enterprise grade anti bot protection for businesses and government organizations that require stringent compliance with global regulations including data protection standards and the european accessibility act eaa designed for security conscious enterprises altcha ensures robust spam prevention while meeting the highest standards of privacy and accessibility learn more easy captcha integration altcha sentinel is a self hosted solution with straightforward integration a 30 day trial begins automatically upon installation install on your infrastructure add the widget to your site migration guides from recaptcha from hcaptcha from cloudflare turnstile examples see example setups of altcha with different front end frameworks react vue svelte solid lit angular widgets add the altcha widget to your website or app web new v3 flutter new v2 react native new v2 server libraries on your backend server verify the altcha payload to validate user interactions and form submissions typescript dart programming language dart php go python java ruby elixir rust c robust captcha alternative altcha offers a powerful self hosted alternative to traditional captchas putting privacy and transparency first as an open source solution it gives you full control over your spam protection system eliminating reliance on third party services that may track user data unlike other options altcha is fully customizable allowing you to tailor the challenge mechanism to your specific needs while ensuring gdpr compliance its lightweight design ensures fast frictionless verification for real users while effectively blocking bots all without compromising user privacy altcha vs captcha comparison protection and privacy compliance spam protection without compromising privacy and accessibility altcha the accessible privacy first recaptcha alternative altcha recaptcha privacy friendly captcha fully gdpr hipaa ccpa lgpd dpdpa pipl compliant no cookies no tracking no external servers accessible captcha wcag eaa compliant captcha works with screen readers and assistive tech user experience frustration free no visual puzzles self verifying proof of work customization fully adjustable security customize widget behavior and appearance advanced security comprehensive protection altcha sentinel for advanced security open source core core available as open source mit free to use and modify with optional commercial altcha sentinel check out 10 reasons altcha is better than traditional captcha for a full breakdown of how altcha outperforms outdated solutions in privacy usability accessibility and security open source captcha vs altcha sentinel the open source widget and integration libraries provide free integration of altcha for websites apps and services while the open source version s proof of work mechanism offers basic protection altcha sentinel delivers enhanced security for mission critical deployments get started with altcha self hosting sentinel sentinel provides a powerful spam protection platform with simple docker based deployment get started with sentinel open source captcha explore our free open source captcha alternative learn how to integrate it deutsch english español français italiano português copyright 2024 altcha org dedicated to privacy altcha is a trademark registered in eu do you like altcha support us by giving us a star on github github altcha org altcha open source captcha accessible captcha better captcha alternative recaptcha alternative proof of work captcha user friendly captcha what is captcha privacy policy impresssum legal compliance european accessibility act 2025 security security advisory vulnerability reporting pricing faq contact examples react captcha example angular captcha example wordpress captcha saas sign in terms of service status altcha is made in europe oss hosted on github website made with astro starlight