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Learn
Guides, insights and best practices around bots, security and UX.
Credential Stuffing: What It Is and How to Stop It
Credential stuffing means bots trying leaked passwords on your login form. How the attack works, how it differs from brute force and how to stop it.
How Bots Bypass CAPTCHAs and How to Protect Your Site
How bots bypass CAPTCHAs with Selenium, Playwright and solving services, and why layered protection with proof-of-work holds up against them.
Math CAPTCHA: What It Is, Examples & Why It Falls Short
Math CAPTCHA explained: how it works, examples of number captchas, why bots solve them instantly, and which alternatives protect your forms.
Website Accessibility: A Practical Guide to WCAG 2.2
Website accessibility in practice: what WCAG 2.2 requires, five common barriers including puzzle CAPTCHAs, and a checklist you can work through today.
Bot Detection and How to Stop Bot Traffic
Bot detection explained: how to spot bot traffic in logs and analytics, which signals separate people from scripts, and how to stop bots without puzzles.
What Is a CAPTCHA? Definition, Types and How It Works
A CAPTCHA is a test that tells humans and bots apart before a form goes through. What CAPTCHA means, how challenge and response work, and the main types.
Invisible CAPTCHA: What It Is and How It Works
An invisible CAPTCHA checks visitors in the background instead of showing a puzzle. How it works, reCAPTCHA's invisible mode and traditional vs invisible.
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EU CAPTCHA: European CAPTCHA Providers Compared
EU CAPTCHA providers compared: TrustCaptcha, Friendly Captcha, ALTCHA and captcha.eu on where data is processed, cookies, what visitors see and price.
Honeypot CAPTCHA: How It Works and When It Is Enough
A honeypot CAPTCHA is a hidden form field that only bots fill in. How to add one, what it stops, how it compares with reCAPTCHA, and when it is enough.
Open Source CAPTCHA: Self-Hosted Options Compared
Open source CAPTCHA options compared by license and hosting: ALTCHA, Cap, mCaptcha, Prosopo and more. What self-hosting takes, and when hosted fits better.
CAPTCHA UX: How to Use It Right
How to reduce bot verification friction: run the check in the background, start it early, add steps only for risky requests and keep it accessible.
The True Cost of Not Using a CAPTCHA
What a website without a CAPTCHA really costs: fraud and chargebacks, hours of spam cleanup, lost trust and legal exposure, with worked examples.
Bot Score Explained: How CAPTCHA and reCAPTCHA Scores Work
A bot score rates how likely a request comes from a bot. What reCAPTCHA v3 scores from 0.0 to 1.0 mean, and why TrustCaptcha counts the other way round.
CAPTCHA vs reCAPTCHA: The Concept and Google's Version
CAPTCHA vs reCAPTCHA: CAPTCHA is any test that tells people and bots apart, reCAPTCHA is Google's version. How both compare to TrustCaptcha.
The Impact of CAPTCHAs on the User Experience (UX)
How CAPTCHAs affect user experience: why image puzzles cost time and conversions, where they fail on mobile and for accessibility, and what works instead.
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Do I need a CAPTCHA?
Do I need a CAPTCHA? When a CAPTCHA is worth it, what it protects against (spam, bots, brute force) and how to choose a modern, privacy-friendly one.