Ask HN: Log file monitoring tool

Ratchet.io works well for this. http://ratchet.io/

Check out http://papertrailapp.com. Awesome service!

Not SaaS, but why not simply use logcheck (http://logcheck.org/) ? It's free software, and seems to be doing what you want (check log files against a whitelist of entries, send an email with all lines that don't match)

I tried a bunch and went with logentries because their categorization and graphing fit my specific need. Good product overall but not very polished.

I found two, DataDog and Loggly. Anyone have any experience with them?