Proton AG is an indie developer on the App Store with 11 apps. On IndieRank, they are ranked #131 out of 3,778 developers (top 4%). Their primary category is Productivity, with 1,176 total ratings and a 4.4★ weighted average. Their most popular app is Proton VPN: 빠르고 안전하게 with 1.0K ratings and a 4.4★ score.