I've used AppSignal for my side projects when they didn't have a free tier yet and really enjoyed it. It's a good balance between seeing important parts of your stack (I've used it with Rails), without being too complicated and overloaded as Sentry.

Thanks for sharing. I have been looking to replace Sentry. It has always been my go to just with its early roots in Python but feels like it misses the mark these days, feels heavy and I don’t really use it correctly. Have also tried systems like Rollbar which is nice but feels too simple. Will try this one out.