I run https://stickler-ci.com While it is not currently at 500/month but it has been there in the past.
I started this as a way to improve review speed at a previous position and it was well received, so I converted the prototype into a it's current form and have been running it for a few years now.
I started this as a way to improve review speed at a previous position and it was well received, so I converted the prototype into a it's current form and have been running it for a few years now.