I was looking into moving away from managed Sentry for GDPR reasons. I was only using Sentry for notifications about unhandled exceptions in my app. All the fancy APM features I did not use. Grouping of similar exceptions, pretty display of tracebacks were nice but not essential.

In my Django app I wrote a logging handler that stores the log records (including traceback) in a database table. I can inspect the log records through Django admin, and a cron job sends me daily emails saying "X new log records in the last 24 hours" so I know to check them out. And that's it :-)

Of course, this does a lot less than Sentry, and has various limitations (e.g. what if the error is about the database being down...), but it fits my needs.

BTW, IIUC, Sentry in its early beginnings was also doing just that – logging to database: https://github.com/dcramer/django-db-log