We are not aware of other FOSS development teams that have as extensive knowledge, both theoretical and practical, about #email and #openpgp and regularly release across all platforms for users world wide ... except for #protonmail with whose technical and security experts we discuss regularly. They are the other major game in town doing pervasive email encryption after all. Did you know that Proton's and delta's VCards are compatible across ecosystems and establish immediate encryption?

@zandbelt @Tutanota they have their own crypto schemes and are not interoperable, unfortunately. Some of us visited them personally in Hannover several years ago but while nice to hang out with they never engaged in interoperability or other joint efforts.

@delta @Tutanota thanks for your reply (personally I use both Proton and Tuta by the way)

@delta @zandbelt That's true, we've focused on implementing quantum-safe encryption first. But I'll bring this up again for the future as interoperability would be amazing!

@delta @zandbelt @Tutanota I am pleasantly surprised @delta. The platform is great and a pleasure to use. I am also gradually transferring contacts to the platform. I use @Tutanota for business communications or in banking.