Open source, no autocorrect, yet - but they’re working on it.
I’m not using it as a daily driver yet because of the autocorrect. But I like the accuracy - for some reason I mis-type less with it than Swiftkey or Heliboard.
Smartkeyboard was my go-to for years (still have it), but it was abandoned.
Also Heliboard, as mentioned by others. Damn good, though I mistype on it more for some reason