Cachet is a status page system for telling customers and stakeholders about downtime, incidents and planned maintenance. It offers branded, responsive status pages, a JSON API for automating incidents, scheduled maintenance and custom metric charts. Cachet is self-hosted: it is a Laravel and PHP application, and version 3 requires PHP 8.3 or later and a database such as MariaDB, MySQL, PostgreSQL or SQLite.
Cachet is maintained by Alt Three Services Limited, a company registered in England and Wales, and the source code is public on GitHub. The project describes itself as open source and free to self-host. Its licence is a custom Cachet licence rather than a standard open-source licence: it permits commercial use and modification, but not distribution as a standalone product. Because you run the software yourself, you decide where it is hosted, including in the EU, and no customer data needs to reach the maintainer.