We are changing our system. We settled on git (but are open for alternatives) as long as we can selfhost it on our own machines.
Specs
Must have
- hosted on promise
- reliabile
- unlikely to be discontinued in the next >5 years
- for a group of at least 20 people
Plus
- gui / windows integration
TBH have you tried just basic git? There’s a web interface built into git itself and you can use ssh for your repositories. It’s simple and just works. If you need a faster web interface there’s also cgit. There’s no bells and whistles either. Just configure ssh, drop your repos in /srv and get to work.
If you need more that just standard basic git the. The other suggestions here are great especially forgjo!