What would be those alternatives? My main point would be to get away from microsoft with my mail and a somewhat sizable cloud storage (0,5-1 TB).
What about kSuite? Are they better?
Between Proton & kSuite, both are good, you just need to compare prices and features. :)
Both have beautiful and modern interfaces - you can create a free account on both to test.
Both companies offer very different services from each other included in their suite, e.g., Proton has a VPN and Password Manager, while Infomaniak offer video call, transfer of large files, office online etc.
It also depends on whether you read your emails in a mobile app, browser or email client and the importance you attach to E2E encryption.