Castle Bot Detection
Castle Bot Detection: Behavioral bot detection across web, APIs and mobile, with a free entry plan. Ranked #7 of 14 in Bot Detection by our editors (7.9/10); pricing: Free plan; best for teams seeking affordable behavioral bot detection.
At a glance
- Editor score7.9 / 10
- PricingFree plan
- Best forTeams seeking affordable behavioral bot detection
- Free planYes
- Paid from$200/mo
- Behavioral analysisYes
- Facts checked24 Sep 2026
Where it wins
- Behavioral, device, IP and email signals in one detection workflow
- Risk and Filter APIs support allow, challenge or deny decisions
- Covers web, API, iOS and Android deployments
Where it doesn't
- Free plan limits retention to 3 days, with 3 seats and 1 environment
- Pro's $200 API budget is shared across requests and IP lookups
- Enterprise pricing starts at $4,000 per month
Our verdict on Castle Bot Detection
Castle Bot Detection analyzes browser interactions, device properties, IP addresses and email signals to identify automated traffic and account abuse. Its Browser SDK collects behavioral and device data, then creates request tokens that a backend can send to Castle’s Risk or Filter APIs. Teams can apply the service to credential stuffing, fake signups, spam, transaction abuse and account-takeover patterns, with policies that allow, challenge or deny requests. A dashboard supports activity investigation and policy configuration.
The published plans cover different operating scales. Free costs $0 per month and includes $5 of API usage, 3 days of data retention, 3 seats and 1 environment. Pro costs $200 per month, includes $200 of API usage, supports 5 API requests per second, and adds chat and email support. That API budget is shared between Risk or Filter requests and IP lookups; the listed allowance is either 40,000 Risk API calls or 200,000 IP lookups per month, not both together. Enterprise costs $4,000 per month and adds custom MTU or volume pricing, dedicated support and an SLA.
Castle’s detection scope is notable for combining behavioral analysis, browser and device fingerprinting, headless-browser and spoofed-device detection, IP and proxy analysis, email-pattern and domain-age analysis, and CAPTCHA flows triggered by Castle responses. Real-time APIs, a JavaScript SDK, cloud deployment and browser-extension support fit teams protecting web, API, iOS and Android experiences. Organizations needing configurable abuse decisions across several channels should consider Castle; teams requiring longer free retention, larger included usage or a lower-cost enterprise tier may prefer a simpler alternative.
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Castle Bot Detection pricing
All 3 Castle Bot Detection plans and prices →
Castle Bot Detection fact sheet
| Free plan | Yes |
|---|---|
| Paid from | $200/mo |
| Protected requests | 40000 requests/mo |
| Behavioral analysis | Yes |
| Device fingerprinting | Yes |
| JavaScript SDK | Yes |
| Real-time scoring API | Yes |
| Challenge tools | Yes |
| Account abuse detection | Yes |
| Deployment | Cloud, Browser extension |
| Platforms | Web, iOS, Android |
| Compliance & security | SOC 2, GDPR |
| Support | Live chat, Email, Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan (source) |
| Website | castle.io |
| Facts checked | 24 Sep 2026 |
Alternatives to Castle Bot Detection
- Fastly Bot ManagementEdge-based bot detection with configurable responses for web applications and APIs.9.2
- Radware Bot ManagerFlexible bot detection and mitigation across web, mobile, and API traffic.9.1
- F5 WAF for Distributed CloudA hybrid F5 WAF with bot controls, API safeguards, and automation for larger teams.9.0
See all Castle Bot Detection alternatives →
Castle Bot Detection vs the competition
- Castle Bot Detection vs Fastly Bot Management
- Castle Bot Detection vs Radware Bot Manager
- Castle Bot Detection vs F5 WAF for Distributed Cloud
- Castle Bot Detection vs Fingerprint
- Castle Bot Detection vs Alibaba Cloud Anti-Bot Service
- Castle Bot Detection vs Vercel
Compare Castle Bot Detection with any tool side by side →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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