Email isn’t exciting, but no one can deny that it still sits at the heart of everyday life and productivity. For open-source users, Thunderbird has been the long-standing favorite, and for good reason. It offers flexibility and control without locking you into a subscription. But Thunderbird is far from perfect. In fact, the app has a bit of a reputation for slow updates and general sluggishness. Betterbird fixes that in more ways than one.