Free / Open-sourceAI content detection and a full writing toolkit in one place
Free / Open-sourceAI content detection and a full writing toolkit in one place
adCAPTCHA records 50 monthly visits with -80.2% month-over-month growth and Paid pricing. hCaptcha records 5,446,045 monthly visits with +18.7% growth and Freemium, Free Trial, Contact for Pricing, Free pricing.
Privacy-first human verification that swaps annoying puzzles for engaging images and video.
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | adcaptcha.com | hcaptcha.com |
| Pricing Model | Paid | Freemium, Free Trial, Contact for Pricing, Free |
| Monthly Visits | 50 (50) | 5.45M (5,446,045) |
| MoM Traffic Delta | -202 (-80.2%) | +858.28K (+18.7%) |
| Primary Market & Share | 🌐 Global (—) | 🇺🇸 United States (18%) |
| Direct Visits / mo | 21 | 3.05M |
| User Rating | 3.8 | 4.1 |
| Supported Platforms | Website | Website |
Privacy-first human verification that swaps annoying puzzles for engaging images and video.
Verify visitors with short image and video interactions instead of text or grid puzzles, using media you upload through the dashboard.
Multiple detection layers run behind a single interaction to catch sophisticated bots without adding friction for genuine users.
Turn the verification moment into a positive touchpoint by featuring your own media, or open the space to advertisers.
Pre-built integrations for popular platforms plus a documented API let teams add human verification to a site or app in minutes.

Privacy-first bot detection and fraud prevention for the web
Multi-layered detection delivers risk scores and near-zero false positives, with passive and no-CAPTCHA modes.
Stop transaction fraud, account takeovers and multi-accounting with privacy-preserving signals and no PII.
A stronger, toll-free alternative to SMS MFA that reduces fraud while simplifying the user experience.
Build custom risk models with adaptive learning and enrich your own ML using blinded, compliant signals.
Free / Open-sourceAI content detection and a full writing toolkit in one place
Free / Open-sourceAI content detection and a full writing toolkit in one place
Free / Open-sourceAI detection and writing verification built for schools and editors
Free / Open-sourceAI detection and writing verification built for schools and editors

Targeted research audiences with AI-verified data quality
Targeted research audiences with AI-verified data quality
Free / Open-sourceDetect, humanize and verify AI content in one place
Free / Open-sourceDetect, humanize and verify AI content in one place

SpecialistEnterprise AI and plagiarism detection for content integrity

SpecialistAI detector, plagiarism and content-quality checks in one scan
SpecialistAI detector, plagiarism and content-quality checks in one scan

Free / Open-sourceDetect AI-generated text and images with benchmark-tested accuracy
Free / Open-sourceDetect AI-generated text and images with benchmark-tested accuracy
Free / Open-sourceAI detector that highlights evidence, not just a score
Free / Open-sourceAI detector that highlights evidence, not just a score

SpecialistApplies AI behavior analysis to network and cloud security, but is designed for enterprise infrastructure rather than web forms.
SpecialistApplies AI behavior analysis to network and cloud security, but is designed for enterprise infrastructure rather than web forms.
SpecialistDelivers endpoint security and data erasure tools, but lacks web-based bot detection and challenge features.
SpecialistDelivers endpoint security and data erasure tools, but lacks web-based bot detection and challenge features.

SpecialistSpecializes in protecting AI models against prompt injection and jailbreaks, rather than standard web traffic bot defense.
SpecialistSpecializes in protecting AI models against prompt injection and jailbreaks, rather than standard web traffic bot defense.
Free / Open-sourceAI image and deepfake forensics that shows its work
Free / Open-sourceAI image and deepfake forensics that shows its work