Hello everyone!

I was wondering what solutions people have for Calendar syncing that are not Proton / Tuta.

Specifically, I was wondering what E2EE options are available that are ideally cross-platform as well.

The main reason why I ask is I am frankly frustrated with how both Tuta and Proton rely on their own apps, and don’t necessarily integrate well with all operating systems. Especially with Proton’s growing suite of apps, it feels like they are in some ways creating their own walled garden. While it is at this time a better privacy option than the conventional options, it is still a situation that feels like a vendor lock-in situation.

Any suggestions would be greatly appreciated, including those that require a self-hosted server :)