Bot accounts
Catch automated accounts at signup so they never reach your community, marketplace or growth metrics.
Bot Detection
Block bots. Welcome humans.
Stop automated traffic before it ever reaches your application.
Trusted by companies around the world
Catch every kind of automated abuse
Form spam
Keep contact forms, comments and signups free of automated submissions.
Account takeover
Block credential stuffing and brute-force attacks before attackers gain access to legitimate accounts.
Signals across every layer
CaptchaFox combines behavioral analysis, device fingerprinting and network reputation to score every request in milliseconds. The model is continuously retrained against live attack traffic, so detection improves as attackers evolve.
- Behavioral analysis — score every interaction in milliseconds against a model continuously retrained on live attack traffic.
- Device & network fingerprinting — spot returning bots and headless browsers by combining device signals with IP reputation.
Friction only when it's needed
Real users pass through invisibly while suspicious traffic is challenged or blocked. You decide the threshold, and CaptchaFox handles the rest, with no broken flows or blanket CAPTCHAs for everyone.
- Invisible for real users — legitimate visitors pass through without ever seeing a CAPTCHA, so there are no broken flows or drop-off.
- Tunable thresholds — decide when to allow, challenge or block, and adjust per endpoint as your traffic shifts.
Risk made visible
Live dashboards break down traffic by risk, country, network and rule so you can see what's working and where pressure is building. Every API call returns the same underlying signals, so your code can react to risk directly instead of guessing.
- Dashboards in real time — watch risk levels, challenge rates and top attack sources update as traffic flows in.
- API response — every verification returns detailed insights you can use directly in your application.
Frequently asked questions
Everything you need to know. Can't find your answer? Contact our support team.
What is bot detection?
Bot detection identifies and stops automated traffic — scrapers, credential-stuffing tools, spam bots and fake account scripts — before it reaches your application. Instead of showing every visitor a puzzle, modern bot detection like CaptchaFox scores each request in real time and only challenges traffic that looks suspicious.
How does CaptchaFox detect bots?
CaptchaFox combines behavioral analysis, device fingerprinting and network reputation to score every request in milliseconds. The detection model is continuously retrained against live attack traffic, so it keeps up as bots evolve.
Will real users have to solve a CAPTCHA?
No. Legitimate visitors pass through invisibly, and only suspicious traffic is challenged or blocked. You control the risk threshold per endpoint, so checkout can stay frictionless while signup is protected strictly.
How do I prevent false positives?
You decide when traffic is allowed, challenged or blocked, and live dashboards show challenge rates and risk levels in real time. Thresholds can be tuned per endpoint and rolled back in one click if a change is too aggressive.
Is CaptchaFox an alternative to Google reCAPTCHA?
Yes. CaptchaFox is a privacy-first, EU-hosted alternative to reCAPTCHA. The API is compatible with reCAPTCHA, so most teams switch by swapping a few lines of code, and your visitors' data stays in Europe instead of being used for advertising profiles.
How long does it take to integrate bot detection?
Most teams are live in minutes. CaptchaFox ships client and server SDKs in every major language, plus ready-made plugins for popular frameworks, CMS platforms and auth providers.
Is CaptchaFox bot detection GDPR compliant?
Yes. All requests are processed and stored exclusively in EU data centers, CaptchaFox is GDPR-compliant out of the box, and a Data Processing Agreement is available on every plan.
Take a look at our latest articles
Read CaptchaFox guides, case studies and insights on bot protection, spam prevention and account security.
May 5, 2026
New Intelligence APIs now available
Use the Intelligence APIs to evaluate incoming traffic before it reaches your application or server.
Read now
April 22, 2026
What Is IP Geolocation? How It Works & Accuracy
Learn how IP geolocation maps IP addresses to physical locations, where accuracy breaks down, and why bot detection systems use it as one signal among many.
Read now
April 15, 2026
What Are Residential Proxies? Bot Attacks & Detection
Learn what residential proxies are, how they work and how attackers take advantage of them.
Read now
April 9, 2026
Best European CAPTCHA Solutions in 2026
Compare the top European CAPTCHA providers for 2026. Evaluate privacy, GDPR compliance, accessibility, and pricing to find the right fit.
Read nowFight bots and protect your users' data.
Don't give fraudsters and spammers a chance and protect your website with CaptchaFox today.
