Reasonable pricing and rock solid for the few years we've used it.

I bought a canned IoT device with Debian image - it had integrated code for oauth <> github integration...but it didn't work. I'm not a developer, so I didnt know where to start. There's a quick start guide that tells you where to go, what changes to make...and they provide a back-end test harness to validate oauth.io <> github integration success...as well as a front end code sample to validate from your client. Could not have been easier! I did have to contact support as I'm a newbie, but they were spot on with help and configuration advice. Much appreciated!

It's so easy to integrate and use, it's also very fast (the sign in flow). I would prefer this over Auth0 anytime.