The real difference: cloud vs no cloud
Proton Drive is genuinely good end-to-end encrypted cloud storage — your files are encrypted before upload and Proton can't read them. But they do live on Proton's servers, reached through a Proton account, which is exactly the convenience many people want: access anywhere, built-in sync, Proton handling durability. Kistvault makes the opposite trade: nothing on any server, no account, and backups you hold yourself.
Where Kistvault is different
- No cloud, no account. There's no server holding your ciphertext and no login to compromise.
- Multi-device without sync. Direct device-to-device pairing instead of a cloud round-trip.
- You own the backup. Export the encrypted container and store it wherever you like.
Where Proton Drive shines
If you want encrypted cloud — automatic sync across devices, access from a browser, sharing, and a provider managing durability and backups — Proton Drive is an excellent, transparent choice from a trusted privacy company. Kistvault simply isn't trying to be a cloud.
Bottom line: pick Proton Drive for encrypted cloud with sync and sharing. Pick Kistvault when your rule is "nothing of mine on anyone's servers," and you'll manage your own backups.