I’ve been using Track:js for a few weeks now here at longren.io.
There may seem like a lot of GoogleBot-related errors at first glance. But, after deleting or filtering those out, you’re left with the errors that really happen most often.
I really enjoy the service, but I can’t see myself paying for it, at least not until I have a viable product of my own that is worthy of being tracked in such detail. Track:js starts out at $29.99 a month, which will get you 500,000 hits per month and 8 days worth of error history.
The guys behind Track:js are pretty awesome and seem to be pretty involved in the tech startup scene here in the Midwest. The footer of their site reads “Proudly built in Minnesota”.