Flexible Pricing

Plans that scale with your user growth

Start protecting your users today with our 14 day trial, no credit card required.

Monitor user activity to understand whether to take further action.


0 5,000,000
Up to 500 monthly active users
Included Features
  • Analytics
  • Slack & Email alerts
  • Access to developer docs
  • Credit card payments
Automate security by letting your users review and mitigate potential threats.
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Unlimited monthly active users
All Standard Features Plus
  • Device Management API
  • Webhooks
  • Email & Chat support
  • Invoice payments
Personalized support, dedicated Slack channel and enterprise SLA.
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Unlimited monthly active users
All Professional Features Plus
  • Enterprise SLA
  • Support SLA
  • Dedicated Customer Success
  • Customizable billing terms
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Frequently Asked Questions

Discover how Castle can help you protect your users

What is a monthly active user?

A monthly active user is a unique user who has created a session with Castle since the beginning of the billing cycle. A session is created either when a page view or a REST API event is tracked for a logged in user. It doesn't matter how long they stay logged in, or how many events they track, they're only counted once per month.

How is pricing calculated when my monthly active users change?

Your price can increase or decrease based on the total number of tracked monthly active users increasing or decreasing.

Is there a free trial?

Yes, you are able to make full use of all Castle features for free up until 500 MAU.

What if I decide to cancel?

If you no longer wish to subscribe to the Standard plan, you can cancel at any time. At that point, your subscription will last until the end of the current monthly billing cycle.

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