We were self hosting sentry for a lot of years, until sentry changed its self hosting requirements and moved to docker. In the meantime it added a lot of extra dependancies that I presume are useful for the sentry cloud (since it needs to monitor thousands of apps) but totally useless for our organization (having to monitor like 10 apps). Also sentry changed its license to non-free.

This Open Source project is implementing the sentry protocol so you can use all the existing sentry integrations for your projects (by changing the DNS) and is much, must simpler to self-host.