- http://raygun.io/ - tracekit
- https://bugsnag.com/ - source maps
- https://rollbar.com/ - source maps
-- http://jserror.net/
- http://www.geterrorzero.com/
- https://www.debuggify.net/ - source maps, tracekit
- http://www.errzero.com/
- http://damnit.jupiterit.com/ [DEAD]
- http://rescuejs.com/ [DEAD, acquired by Bugsnag]
- https://errplane.com/ [DEAD, pivoted]
+- http://jserror.net/ [DEAD, probably]