I work at a small-to-medium sized ISP, and we use pure Redmine since 2018 for documentation, and 'internal tickets'. It's a really good tool, helped us get real

I work at a small-to-medium sized ISP, and we use pure Redmine since 2018 for documentation, and 'internal tickets'. It's a really good tool, helped us get really organized. You can customize the heck out of it, nowadays we have really complex BIs to monitor tickt times, SLAs, project activity, etc. The API is very good and i made a ton of usefull things with it, even Telegram bots for our internal groups. The biggest complaint we have on it is how bad it's wiki search features are, and indeed they are too simple.