Protect your forms
from bots and spam
Our own alternative to the ready-made captchas of the big platforms. Two minutes to integrate. Behavioural analysis. Visitor data stays with you.
Free forever
No hidden charges and no limit on requests. The free plan covers one site; for several sites there is a paid one.
Two minutes to integrate
Add two lines of HTML to your site. That is it. Works with any framework and any language.
Behavioural analysis
We watch the mouse, the keyboard and the solving time. Every answer gets a score from 0 to 1.
Privacy
Your data stays yours. The widget and token verification run on our own infrastructure in Russia and call no third-party services. GDPR-friendly.
Dashboard with analytics
Follow conversion, call volume and errors in real time.
Built for developers
REST API, server-side verification, callbacks, light and dark themes.
How to connect
Sign up and add your site
Create a Pulse account, open Stitex Captcha and add your domain. You get a Site Key and a Secret Key.
Put the widget on your site
<div id="stitex-captcha" data-sitekey="YOUR_SITE_KEY"></div> <script src="https://pulse.stitex.com/captcha/stitex-captcha.js"></script>
Verify the token on your server
POST https://pulse.stitex.com/api/captcha/verify
{ "secretKey": "YOUR_PRIVATE_KEY", "solveToken": "TOKEN_FROM_FORM" }Read more
Invisible Protection for Forms and Login
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Invisible CAPTCHA vs Image CAPTCHA
An image challenge filters out real customers along with bots, and the loss never shows in your statistics. Where each approach fits, and why invisible usually wins.
How to Tell a Bot From a Human in Advertising
Bots give themselves away through combined signals, behavioural and technical. What each signal shows, why one alone is never a verdict, how to read the grey zone.
The “Complaint” Phishing Attack on Business Email
A bare urgent subject, a businesslike message and one download button leading to a fake login page. Five signals that identify it, and how to block it.