Tresorit

Tresorit applies zero-knowledge, end-to-end encryption to every file before it leaves the user's device, ensuring that no third party can access the data. Operating under stringent Swiss privacy laws, it provides an impenetrable, compliance-focused security architecture.

Founded by three Hungarian programmers in 2011, headquartered in Switzerland, and acquired in 2021 by Swiss Post to cement its status as an ultra-secure European enterprise platform.