Bot defense is the multi-layered security discipline of detecting, mitigating and preventing automated attacks against web and mobile applications. Effective bot defense combines behavioural analysis, device fingerprinting, network reputation, adaptive challenges and machine learning — layered so that if one signal is spoofed, others still catch the attacker. Prosopo's bot defense stack does all of this in a single drop-in integration.
Bot Defense — Enterprise Bot & Agent Trust Management
Enterprise bot defense that stops credential stuffing, scraping, inventory hoarding, account takeover and scalper bots — while letting real users and authorised AI agents through invisibly. GDPR-compliant, EU-hosted, deployable at the edge or backend.
How it works
What effective bot defense looks like
A modern bot defense strategy stops attackers at every layer, not just the widget on your login page.
Detect
Behavioural analysis, device fingerprinting, TLS/JA4 signatures, IP reputation, and residential-proxy detection combine into a per-request risk score.
Decide
Legitimate humans and authorised agents pass. Suspicious sessions get a proof-of-work or image challenge. Known-bad traffic is blocked at the door.
Adapt
Machine-learning models retrain continuously against new attack patterns, so countermeasures emerge during the attack rather than after it.
Why Prosopo
Why teams pick Prosopo for bot defense
Multi-layered detection
Behavioural analysis, device fingerprinting, residential-proxy detection, proof-of-work, and adaptive CAPTCHA in one integrated stack.
Stops modern automation
Detects stealth headless browsers (Puppeteer Stealth, Playwright Stealth, undetected-chromedriver), rotating residential proxies and real-device farms — where legacy vendors fail.
Invisible for real users
Over 99% of legitimate sessions complete with zero friction. Only high-risk traffic is challenged or blocked.
GDPR-compliant by design
No third-party tracking cookies. No cross-site behavioural profile. EU-hosted processing on request.
Deploys anywhere
Backend SDK, Cloudflare Workers, Lambda@Edge, Fastly Compute@Edge, Vercel, Netlify, on-premise. No CDN lock-in.
Agent-aware
Authorised AI shopping and browsing agents pass through. Only unauthorised automation is challenged.
What "bot defense" actually means
Bot defense is the umbrella discipline that covers everything modern security teams need to keep automated attackers out of applications: credential stuffing, scraping, inventory hoarding, account takeover, ticket scalping, spam bot submissions, and the newer wave of AI-driven crawlers that ignore robots.txt entirely.
Ten years ago, "bot defense" was mostly a CAPTCHA plus an IP blocklist. In 2026, that combination catches almost nothing. Stealth headless browsers on rotating residential proxies pass a CAPTCHA image check in milliseconds, at a fraction of a cent per solve via CAPTCHA-solving farms. Serious bot defense needs the whole stack — detection, decision, and continuous adaptation — not just a widget.
How Prosopo compares to enterprise bot management vendors
| Capability | Prosopo | DataDome | HUMAN | Arkose Labs |
|---|---|---|---|---|
| Behavioural analysis | ● | ● | ● | ● |
| Residential-proxy detection | ● | ● | ● | ● |
| Invisible-first UX (no default challenge) | ● | ● | ● | ● game challenges |
| EU-hosted processing | ● | ● enterprise | ● | ● |
| No third-party tracking cookies | ● | ● | ● | ● |
| Public pricing / free tier | ● 10K/mo free | ● sales-quoted | ● sales-quoted | ● sales-quoted |
| Agent-aware policy (AI agents) | ● | ● | ● | ● |
For the full Forrester picture see the 2026 Wave for Bot and Agent Trust Management — DataDome, HUMAN and Kasada were named Leaders. For a CAPTCHA-focused comparison of the whole market, read Cloudflare Turnstile alternatives.
Bot defense use cases
Prosopo's bot defense stack protects against every major automated attack pattern:
- Credential stuffing and account takeover — password-replay and ATO attacks against login endpoints and password-reset flows.
- Web scraping — AI-training crawlers, competitive price monitoring, and content theft.
- Denial of inventory — hoarding bots that lock up carts on sneaker drops, limited releases and events.
- Ticket scalping — professional scalper toolkits at ticketing platforms and venues.
- Spam bot protection — form spam, fake signups, disposable-email abuse.
- Phishing site defence — verifying inbound traffic on authentication endpoints.
Deploy wherever your traffic lives
Prosopo bot defense integrates at the layer that makes most sense for your stack:
- Web widget. Drop-in for any login, signup, checkout, contact form or comment box.
- Backend SDK. Node, PHP, Python, Go, Java, Ruby, .NET.
- CDN edge. Cloudflare Workers, Lambda@Edge, Fastly Compute@Edge — verification before requests reach origin.
- API gateway. Verify every request in front of your API endpoints.
- WordPress and CMS plugins. 16 WordPress plugin integrations — Contact Form 7, Gravity Forms, WPForms and more.
Bot defense that respects your privacy stack
Enterprise buyers care about privacy for the same reason they care about security: both show up in the RFP.
- No third-party tracking cookies. Nothing to disclose in your cookie banner or privacy notice.
- No cross-site behavioural profile. No data resold to ad networks.
- EU-hosted processing on request. Keep processing in Europe, keep your DPA short.
- Data minimisation by design. Full details in our privacy policy.
Talk to us
Bot defense is a boardroom-level decision — it protects revenue, brand, and customer trust simultaneously. If you're evaluating vendors, we'd like to be on the shortlist.
- Book an enterprise call — bring your threat model, we'll show you what our detection catches on your real traffic.
- Read the Forrester Wave 2026 breakdown — where the market stands.
- Compare CAPTCHA-layer solutions — how the widget layer stacks up.
Getting started
Deploy Prosopo bot defense
From proof-of-concept to production in days, not months.
1
Step 1: Talk to us
30-minute call with a Prosopo engineer. Bring your threat model or a real attack log — we will show you what our detection catches on your traffic.
2
Step 2: Integrate
Drop-in SDK for backend, or edge-native deployment on Cloudflare Workers, Lambda@Edge or Fastly Compute@Edge. Web widget integrates in an afternoon.
3
Step 3: Baseline and go live
Behavioural models baseline your legitimate traffic, then move to enforcement mode. Zero-friction for real users; challenge or block for attackers.
By the numbers
Trusted by companies of all sizes.
Active websites
0+
Monthly verifications
0+
Bots stopped per month
0+
Reviews
Our customers love us.
Hundreds of businesses have made the switch from reCAPTCHA and hCaptcha to Prosopo. Here's what they have to say.
Frequently Asked Questions
What is bot defense?
How is bot defense different from a CAPTCHA?
A CAPTCHA is a single detection layer — usually a challenge presented to the user. Bot defense is the whole system: silent detection (behavioural, device, network), adaptive escalation (bring out a CAPTCHA only when needed), and integrated response (block, throttle, step-up authentication). Modern bots defeat single-layer CAPTCHAs cheaply through solving farms, so a CAPTCHA alone is no longer sufficient for enterprise use cases.
What is bot & agent trust management?
Bot and agent trust management is the newer Forrester category for the same core discipline, updated to reflect the rise of authorised AI agents. Rather than blanket-blocking all automation, agent trust management distinguishes malicious bots from authorised agents (AI shopping assistants, search crawlers, integration partners) and applies different policies to each. See our Forrester Wave 2026 bot management coverage for the current market picture.
Which bot defense vendors does Forrester recommend?
The Q2 2026 Forrester Wave named DataDome, HUMAN and Kasada as Leaders in bot and agent trust management. Cheq and PerimeterX were named Strong Performers. Prosopo is a newer entrant focused on the intersection of CAPTCHA-replacement and enterprise bot defense — see our detailed breakdown of the report and how Prosopo compares.
Can bot defense stop credential stuffing and account takeover?
Yes. Credential stuffing and account takeover are two of the primary threats that bot defense targets. Prosopo's stack scores each login and account-recovery request against behavioural, device and network signals — legitimate users pass invisibly, and credential-replay infrastructure is throttled or blocked. See our credential stuffing use case for the full pattern.
Is Prosopo's bot defense GDPR compliant?
Yes. Prosopo is designed as a GDPR-compliant bot defense platform: no third-party tracking cookies, no cross-site behavioural profile, and EU-hosted processing endpoints on request. That matters because most US-headquartered bot management vendors introduce DPA and data-transfer obligations that European buyers would prefer to avoid.
More from Prosopo
What else can Prosopo protect for you?
No matter the threat, we have a solution to keep your business safe.
Product
Access Control
Prosopo's Access Control dynamically generates rules to protect your website from bots and spam.
Learn moreProduct
API Protection
Stop automated abuse of your API endpoints with Prosopo's bot-aware verification and access control.
Learn more
Product
Invisible CAPTCHA
Prosopo's Invisible CAPTCHA provides seamless bot protection without disrupting the user experience.
Learn more
Product
Risk Scoring
Prosopo's Risk Scoring provides real-time analysis of user behavior to identify potential threats.
Learn more
Product
Spam Bot Protection: Stop Form Spam Before It Lands
Spam bot protection that blocks fake signups, throwaway emails and abusive networks before they reach your forms — without breaking the experience for real users.
Learn more
Product
Bot Defense — Enterprise Bot & Agent Trust Management
Enterprise bot defense from Prosopo — multi-layered protection against credential stuffing, scraping, inventory hoarding, account takeover and scalper bots. GDPR-compliant, EU-hosted, drop-in for CDN edge or backend.
Learn moreProduct
Procaptcha - GDPR Compliant CAPTCHA
With Prosopo's GDPR friendly captcha, enjoy seamless website security. Protect users, prevent bots, and stay compliant - all while keeping it simple.
Learn more