You have plenty of other options - Rollbar and Sentry come to mind, though I've never used either, but have heard good things about both.
Lastly, if you have back-end monitoring already then you might want to see if that solution has a front-end integration. Datadog does, for example (also a Datadog customer, but again no affiliation with them). Warning: Datadog is powerful but can be a bit overwhelming with features, I probably wouldn't start there if you just want some front-end error tracking.