I-ProtonMail – iklayenti le-imeyili elisebenzisa ukubethela kokugcina kwemiyalezo ephephile. Isoftware isebenzisa izindlela ezikhethekile zokudluliswa kwedatha okuqinisekisa ukuthi abasebenzisi kuphela abathintekayo kwezokuxhumana abazokwazi ukuthola imiyalezo. I-ProtonMail ivimbela ibhokisi lakho leposi ukuthi libukwe noma ngubani omunye umuntu, kufaka phakathi abahlinzeki be-imeyili. Isoftware ikuvumela ukuthi uthumele imilayezo ebethelwe kubasebenzisi bezinye izinsizakalo zemeyili, kepha ngaphandle kokufaka iphasiwedi, akunakwenzeka ukufinyelela i-imeyili. I-ProtonMail inikeza umbono oyingqayizivele wephasiwedi ukuze owemukelayo akwazi ukukhipha umyalezo wakho uma ungamtshelanga iphasiwedi. Futhi, iProtonMail isusa ngokuzenzakalela imilayezo ebethelwe lapho iphelelwa yisikhathi.