http4k Pro is a set of commercially-licensed modules that extend http4k with production-grade capabilities - enhanced security, observability, AI tooling and developer productivity - for teams running http4k in regulated, high-volume environments.

Every Pro module is built on the same functional foundation as the open-source core and held to the same testing standards. They add enterprise-focused features, not a different way of working - so adopting one is just another dependency, with the same in-memory testability you already rely on. Browse the modules in the sidebar, or see licensing and pricing on the Pro page.

Pro modules are free for personal use, non-profits and qualifying small businesses. They can be licensed standalone under the http4k Commercial License, or come bundled as part of the http4k Enterprise Edition.