Free, no-nonsense, super-fast blogging. No javascript, no stylesheets, no trackers. Just your words. All the post content is written in Markdown. Bear Blog has been built as a platform and not as an indiviual blog system. It is more like Medium than Jekyll. Due to this it currently isn't possible to self-host Bear Blog as an individual blog.
Well, it probably is, you'll just be the only user.