GlitchTip
This product is listed as “Self-hosted & Open Source”, which is why it does not necessarily have to be European.
GlitchTip is an open source and self-hosted error tracking service. A reimplementation of the Sentry error tracking platform, which makes it fully intractable with Sentry clients.
We only recommend self-hosting GlitchTip because it is created by an American company.