ProtonMail – abokin ciniki na imel wanda ke amfani da ɓoye ƙarshen-ƙarshen-ƙarshe don saƙon kafaffen tsaro. Software yana amfani da hanyoyi na musamman na canja wurin bayanai waɗanda ke tabbatar da cewa masu amfani kawai waɗanda ke da hannu cikin sadarwa ne kawai za su sami damar yin amfani da saƙonni. ProtonMail ya hana kowa ganin akwatin akwatin wasikunku kallon shi, gami da masu samar da imel. Software yana baka damar aika saƙon rufaffen asiri ga masu amfani da sauran sabis ɗin wasiƙa, amma ba tare da shigar da wata kalmar sirri ba, ba shi yiwuwa a shiga imel ɗin. ProtonMail yana ba da alama ta kalmar sirri ta musamman don mai karɓa zai iya murƙushe saƙon ku idan ba ku gaya masa kalmar sirri ba. Hakanan, ProtonMail yana share saƙon sirri ta atomatik lokacin da suka ƙare.