Proton Drive is a secure cloud file storage solution from Proton AG, a Swiss company. All data (file contents and metadata) is encrypted end-to-end on the client side, so only the user can decrypt it. The service is hosted in Switzerland, benefiting from strict Swiss privacy and neutrality laws. Proton emphasizes that even Proton cannot access user files. The platform supports secure sharing and integration with Proton’s ecosystem (Mail, Calendar). The site does not specify when Proton Drive was launched (Proton was founded in 2013 in Switzerland).