Free
Free
Free tier published at $0/mo with included API usage credits on the pricing page.
- Usage credit
- Includes $5 of API usage with 5,000 IP lookups or 1,000 Risk API calls.
- Seats
- Three seats and one environment on the Free plan card.
Security · Vendor site 2026-10-04
Castle provides SDKs and APIs to detect bots, monitor risky logins, and stop account abuse using device, email, IP, and behavioral intelligence. Teams integrate Castle to score traffic and automate policy actions in web and mobile apps.
Understand the total cost
Free
Free
Free tier published at $0/mo with included API usage credits on the pricing page.
Pro
$200.00 /mo
Pro plan is listed at $200/mo including $200 of API usage on castle.io/pricing.
No retained pricing changes yet. A current price alone does not establish a historical trend.
Reviewed vendor source
Read original source ↗Facts apply to the named version and check date. Send a sourced correction if something changed.
Yes. Castle has an ongoing free plan. Free plan includes $5 of API usage with 5,000 IP lookups or 1,000 Risk API calls for evaluation.
Castle paid plans start at $200 per month (Pro $200/mo). Prices are in USD and last checked Oct 4, 2026.
API or developer access is mentioned. Docs describe Castle as a suite of APIs for bot detection and abuse prevention with Risk and IP Intelligence endpoints.