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 <button id=mode class="btn btn-link order-2 order-md-4" type=button aria-label="Toggle mode">
 <span class=toggle-dark><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-moon"><path d="M21 12.79A9 9 0 1111.21 3 7 7 0 0021 12.79z"/></svg></span><span class=toggle-light><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-sun"><circle cx="12" cy="12" r="5"/><line x1="12" y1="1" x2="12" y2="3"/><line x1="12" y1="21" x2="12" y2="23"/><line x1="4.22" y1="4.22" x2="5.64" y2="5.64"/><line x1="18.36" y1="18.36" x2="19.78" y2="19.78"/><line x1="1" y1="12" x2="3" y2="12"/><line x1="21" y1="12" x2="23" y2="12"/><line x1="4.22" y1="19.78" x2="5.64" y2="18.36"/><line x1="18.36" y1="5.64" x2="19.78" y2="4.22"/></svg></span></button><ul class="navbar-nav social-nav order-3 order-md-5"><li class=nav-item><a class=nav-link href=https://github.com/mCaptcha><svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="currentcolor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-github"><path d="M9 19c-5 1.5-5-2.5-7-3m14 6v-3.87a3.37 3.37.0 00-.94-2.61c3.14-.35 6.44-1.54 6.44-7A5.44 5.44.0 0020 4.77 5.07 5.07.0 0019.91 1S18.73.65 16 2.48a13.38 13.38.0 00-7 0C6.27.65 5.09 1 5.09 1A5.07 5.07.0 005 4.77 5.44 5.44.0 003.5 8.55c0 5.42 3.3 6.61 6.44 7A3.37 3.37.0 009 18.13V22"/></svg><span class="ms-2 visually-hidden">GitHub</span></a></li></ul><div class="collapse navbar-collapse order-4 order-md-1"><ul class="navbar-nav main-nav me-auto order-5 order-md-2"><li class=nav-item><a class=nav-link href=/blog/>Blog</a></li><li class=nav-item><a class=nav-link href=/community/>Community</a></li><li class=nav-item><a class=nav-link href=/contact/>Contact</a></li><li class=nav-item><a class=nav-link href=/about/>About</a></li><li class=nav-item><a class=nav-link href=/docs/introduction/installing-captcha/>Docs</a></li></ul><div class="break order-6 d-md-none"></div><form class="navbar-form flex-grow-1 order-7 order-md-3"><input id=userinput class="form-control is-search" type=search placeholder="Search docs..." aria-label="Search docs..." autocomplete=off><div id=suggestions class="shadow bg-white rounded"></div></form></div></div></header><div class="wrap container" role=document><div class=content><section class="section container-fluid mt-n3 pb-3"><div class="row justify-content-center"><div class="col-lg-12 text-center"><h1 class=mt-0>Defend Like Castles</h1></div><div class="col-lg-9 col-xl-8 text-center"><p class=lead>mCaptcha is proof-of-work based captcha system that is privacy focused and fully automated.</p><a class="btn btn-primary btn-lg px-4 mb-2" href=https://demo.mcaptcha.org/ role=button>Try mCaptcha</a>
 &nbsp &nbsp &nbsp
-      <a class="btn btn-primary btn-lg px-4 mb-2" href=/docs/prologue/introduction/ role=button>Get started</a><p class=meta>Libre software <a href=https://github.com/mCaptcha>GitHub</a></p></div></div></section></div></div><section class="section section-sm"><div class=container><div class="row justify-content-center text-center"><div class=col-lg-5><h2 class=h4>Privacy focused</h2><p>Doesn't track, doesn't profile your users.</p></div><div class=col-lg-5><h2 class=h4>Robust and Accurate</h2><p>Got users behind <a href=https://en.wikipedia.org/wiki/Network_address_translation>NATs</a>? No issues. We don't use IP address for rate-liming. NAT or not you get the mCaptcha experience.</div><div class=col-lg-5><h2 class=h4>Best-in-class UX</h2><p>mCaptcha is silent, so silent that your users won't even feel it. No more annoying images, no more helping for Big Brothers with their ML stuff</p></div></div><div class="row justify-content-center text-center"><div class=col-lg-5><h2 class=h4>Defend like castles</h2><p>Our <a href=https://en.wikipedia.org/wiki/Proof_of_work>PoW</a>-based solution defends fierily. mCaptcha makes attacking your site more expensive than what it will take for you to respond to the attacker's requests</p></div><div class=col-lg-5><h2 class=h4>Libre Software</h2><p>Client libraries are licensed using proprietary-friendly free software licenses but the core is <a href=http://www.gnu.org/licenses/agpl-3.0>AGPL'd</a>. We believe this is a tech that can change the way the web works so mCaptcha will always be free</p></div><div class=col-lg-5><h2 class=h4>xCaptcha drop-in replacement</h2><p>Already using a captcha solution? No worries, our APIs are compatible with reCAPTCHA and hCaptcha!</p></div></div></div></section><section class="section section-sm container-fluid"><div class="row justify-content-center text-center"><div class=col-lg-9></div></div></section><footer class="footer text-muted"><div class=container><div class=row><div class="col-lg-8 order-last order-lg-first"><ul class=list-inline><li class=list-inline-item>Powered by <a href=https://gohugo.io/>Hugo</a>, and <a href=https://getdoks.org/>Doks</a></li></ul></div><div class="col-lg-8 order-first order-lg-last text-lg-end"><ul class=list-inline><li class=list-inline-item><a href=/about/>About</a></li><li class=list-inline-item><a href=/donate>Donate</a></li><li class=list-inline-item><a href=/privacy-policy/>Privacy</a></li><li class=list-inline-item><a href=/security>Security</a></li><li class=list-inline-item><a href=https://stats.uptimerobot.com/GK7VLFJnBl>Status</a></li><li class=list-inline-item><a href=/thanks>Thanks</a></li></ul></div></div></div></footer><script src=/main.min.993b2b4c58b07e7a4bb3423cf18ccd78a85d0063680c0fc9bf6d9cc02be98e08793034d984dd8f7c60ad5b70f3186cc8bc280b1077b7e37c2d64f36f118099bb.js integrity="sha512-mTsrTFiwfnpLs0I88YzNeKhdAGNoDA/Jv22cwCvpjgh5MDTZhN2PfGCtW3DzGGzIvCgLEHe343wtZPNvEYCZuw==" crossorigin=anonymous defer></script><script src=/index.min.7d5d1ca710ea94116971c4f9b5d605926d6787458c6db6a8692e7e43552c36a15900b49fcf046f4201b11961d77342063a73a6d585b7ca1c6ea1efbbb157e8b4.js integrity="sha512-fV0cpxDqlBFpccT5tdYFkm1nh0WMbbaoaS5+Q1UsNqFZALSfzwRvQgGxGWHXc0IGOnOm1YW3yhxuoe+7sVfotA==" crossorigin=anonymous defer></script></body></html>
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+      <a class="btn btn-primary btn-lg px-4 mb-2" href=/docs/introduction/installing-captcha/ role=button>Get started</a><p class=meta>Libre software <a href=https://github.com/mCaptcha>GitHub</a></p></div></div></section></div></div><section class="section section-sm"><div class=container><div class="row justify-content-center text-center"><div class=col-lg-5><h2 class=h4>Privacy focused</h2><p>Doesn't track, doesn't profile your users.</p></div><div class=col-lg-5><h2 class=h4>Robust and Accurate</h2><p>Got users behind <a href=https://en.wikipedia.org/wiki/Network_address_translation>NATs</a>? No issues. We don't use IP address for rate-liming. NAT or not you get the mCaptcha experience.</div><div class=col-lg-5><h2 class=h4>Best-in-class UX</h2><p>mCaptcha is silent, so silent that your users won't even feel it. No more annoying images, no more helping for Big Brothers with their ML stuff</p></div></div><div class="row justify-content-center text-center"><div class=col-lg-5><h2 class=h4>Defend like castles</h2><p>Our <a href=https://en.wikipedia.org/wiki/Proof_of_work>PoW</a>-based solution defends fierily. mCaptcha makes attacking your site more expensive than what it will take for you to respond to the attacker's requests</p></div><div class=col-lg-5><h2 class=h4>Libre Software</h2><p>Client libraries are licensed using proprietary-friendly free software licenses but the core is <a href=http://www.gnu.org/licenses/agpl-3.0>AGPL'd</a>. We believe this is a tech that can change the way the web works so mCaptcha will always be free</p></div><div class=col-lg-5><h2 class=h4>xCaptcha drop-in replacement</h2><p>Already using a captcha solution? No worries, our APIs are compatible with reCAPTCHA and hCaptcha!</p></div></div></div></section><section class="section section-sm container-fluid"><div class="row justify-content-center text-center"><div class=col-lg-9></div></div></section><footer class="footer text-muted"><div class=container><div class=row><div class="col-lg-8 order-last order-lg-first"><ul class=list-inline><li class=list-inline-item>Powered by <a href=https://gohugo.io/>Hugo</a>, and <a href=https://getdoks.org/>Doks</a></li></ul></div><div class="col-lg-8 order-first order-lg-last text-lg-end"><ul class=list-inline><li class=list-inline-item><a href=/about/>About</a></li><li class=list-inline-item><a href=/donate>Donate</a></li><li class=list-inline-item><a href=/privacy-policy/>Privacy</a></li><li class=list-inline-item><a href=/security>Security</a></li><li class=list-inline-item><a href=https://stats.uptimerobot.com/GK7VLFJnBl>Status</a></li><li class=list-inline-item><a href=/thanks>Thanks</a></li></ul></div></div></div></footer><script src=/main.min.993b2b4c58b07e7a4bb3423cf18ccd78a85d0063680c0fc9bf6d9cc02be98e08793034d984dd8f7c60ad5b70f3186cc8bc280b1077b7e37c2d64f36f118099bb.js integrity="sha512-mTsrTFiwfnpLs0I88YzNeKhdAGNoDA/Jv22cwCvpjgh5MDTZhN2PfGCtW3DzGGzIvCgLEHe343wtZPNvEYCZuw==" crossorigin=anonymous defer></script><script src=/index.min.7d5d1ca710ea94116971c4f9b5d605926d6787458c6db6a8692e7e43552c36a15900b49fcf046f4201b11961d77342063a73a6d585b7ca1c6ea1efbbb157e8b4.js integrity="sha512-fV0cpxDqlBFpccT5tdYFkm1nh0WMbbaoaS5+Q1UsNqFZALSfzwRvQgGxGWHXc0IGOnOm1YW3yhxuoe+7sVfotA==" crossorigin=anonymous defer></script></body></html>
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