[nixme]

Sentry: https://getsentry.com/welcome/

It is good.

Easy to deploy internally. Python server, client libs for basically everything, plugins to chat apps, issue trackers, you name it: https://github.com/getsentry/sentry

The JS reporting supports source maps too.

[clarkdave]

I'm a fan of Sentry, and their hosted service is very affordable. The fact you can push data to it on your own terms is great. I use it in combination with Logstash as an output, so any logged errors reaching Logstash are automatically piped to Sentry.

As a bonus, should you wind up deploying Sentry internally, you need only update the API host in Logstash.

[nkrba]

We use Sentry a lot at Justcoin. Frontend, backend, workers, everywhere. It doesn't look great and their support is a bit slow at times, but it works and is affordable for startups.