Choose your plan

Successful Risk and Filter requests are billed at $0.005 each, while every valid IP entity returned by a single or batch lookup is billed at $0.001. Both products draw from your plan's shared monthly API budget.

The Free plan includes $5 of API usage, equivalent to 1,000 Risk and Filter requests, 5,000 IP entities, or any mix of the same value. The Pro plan includes $200 of API usage, equivalent to 40,000 Risk and Filter requests, 200,000 IP entities, or any mix of the same value.

IP Intelligence lookups give you connection intelligence for a specific IP through a simple API call. Risk and Filter requests are available when you build a full Castle integration, providing deeper intelligence about user behavior, devices, and risk scores.

On the Pro plan, usage above the monthly included budget is billed on a pay-as-you-go basis at the same per-request rates. The Free plan has a fixed API budget for evaluating Castle and does not support overages. Upgrade to Pro before production for higher rate limits and uninterrupted pay-as-you-go access.

No. The unused portion of your included API budget expires at the end of each billing cycle, and a new monthly balance becomes available when the next cycle begins.

Absolutely. You can upgrade or downgrade your plan at any time through your billing settings.

You can cancel your subscription at any time. Your plan will remain active until the end of the current billing cycle.

We accept all major credit cards. For Enterprise plans, we can also arrange invoice payments.

Yes, we offer SLAs for our Enterprise plan customers. The specifics of the SLA, including uptime guarantees and response times, can be customized to meet your business requirements.

Dedicated support for the setup and integration of our APIs is available exclusively with our Enterprise plan. This includes personalized assistance to ensure that the integration process is smooth and fits within your technical infrastructure.

Within our Enterprise plan, we provide the flexibility to choose an MTU-based pricing model. This alternative allows you to pay based on the number of unique users you track each month rather than the volume of API calls. This option can be especially cost-effective for businesses with high user engagement levels.