Proton recent outages make me change my mind

Proton has been suffering partial outages for several hours lately (last week and today). Other times mail and calendar take a while to sync. As a paying user that has moved everything to Proton I'm starting to consider to migrate to other solutions. I think the best is to buy your own domain so that you are free to change providers any time. I believed in Proton product but these outages are really changing my mind. Is Tuta more reliable? What other options are out there? (been a while I don't search for alternatives).