Bugsink is an error-tracking tool that collects exceptions from running applications and shows developers when and why their code fails in production, including stack traces and local variables. It works with Sentry's open-source SDKs, so an existing application can be connected by changing its DSN. Bugsink can be used in two ways with the same product: as a managed service operated by Bugsink, or self-hosted on your own infrastructure, for example with Docker.
Bugsink is made by Bugsink B.V. in Utrecht, the Netherlands. The managed service runs in the European Union, and with self-hosting all data stays in your own environment. The source code is public on GitHub, but it is released under the PolyForm Shield License, which allows broad use but prohibits offering a product that competes with Bugsink. That makes it source-available rather than open source in the OSI sense. For a European organisation, it combines an EU-based provider with the option to keep error data entirely in-house.