Thunderbird...or Betterbird? ...or Evolution?

Hi guys!

At this point it's been a while since I don't use a mail client, last time Evolution sorted my need of Activesync compatibility and I used it extensively. But these days I no longer need that, as I'm planning to use just protonmail and maybe also sync gmail to it (although for gmail I kinda prefer the web). Reading through the comments on the app I saw mentions about Betterbird...What's your thoughts on this?