That's a bit scary on one hand, it's pretty amazing though how much free value you can get from OS or Freemium tools. We use e.g. the free versions of RocketChat and Gitlab, they work great and we didn't have many problems administrating them (once a short outage due to a full disk, but gitlab.com had multiple outages in the same time frame). So I think if you are willing to put a little effort into self hosting you have a lot of choices available. Deployment and maintenance has become easier as well with tools like Ansible and Docker.