Proton Calendar

Proton Calendar is a privacy-focused scheduling application developed by Proton AG, based in Geneva, Switzerland. Launched as part of the broader Proton ecosystem that includes Proton Mail and Proton Drive, it prioritizes end-to-end encryption to ensure that even the service provider cannot access user schedule data. The product's development and hosting are centered in Switzerland, benefiting from the country's stringent data protection laws.

As of 2024 and beyond, Proton remains a privately held company owned by its employees and a non-profit foundation. This unique ownership structure is designed to safeguard the company's independence and its commitment to privacy, resisting potential acquisitions by larger tech conglomerates. The company's operations are governed by Swiss law, specifically the Federal Act on Data Protection (FADP) and the Swiss Information Security Act, making it a leading choice for users seeking digital sovereignty.