Sentry is technically self-hostable, but they provide no deployment guidance beyond running the giant blob of services/microservices (including instances of postgres, redis, memcache, clickhouse, and kafka) as a single docker-compose thing. I get why they do this and think it's totally reasonable of them, but Sentry is a very complicated piece of software and takes substantially more work IME to both get up and running and maintain compared to other open-source self-hosted observability/monitoring/telemetry software I've had the pleasure of working with.

PostHog and Rudderstack say the same things. They're not really self hosted. But that's the rub, if someone authored a good operator for Sentry, Sentry as a commercial service would cease to exist. That's not good in my opinion, they do real innovative stuff.

It's tough. We should have never done "give away the software, charge for hosting." The market, in every sense, has been telling you that you're really building value for AWS, for years, by doing that.

But not foss. It's using the BSL or FSL or whatever.