Ask HN: Who has successfully migrated from Opbeat?

We've been using Opbeat for error reporting & logging at our web development agency. We are a small team (5 developers), but with a relatively large number of projects for a team of our size (70+, growing by a couple a month). Since Opbeat is being retired in May, we're looking for a replacement.

The things we can't live without:

* Django integration * Slack integration (errors posted to a channel as they come in) * GitHub integration * Optional but would be REALLY nice: a way to import our projects from Opbeat

What are former Opbeat users using, and would it be a good fit for us?