SimpleX Chat

SimpleX Chat is a free and open-source cross-platform end-to-end encrypted instant messaging app and console application. The app does not require phone number, email address, or any other external identification. SimpleX applications are available for Android, iOS, Windows, macOS operating systems, and various Linux distributions. In July 2024, the American cybersecurity firm Trail of Bits conducted an independent security audit of the SimpleX Chat's cryptographic protocols. Following the arrest of Pavel Durov in France in 2024 many extremist groups fled from Telegram to SimpleX due to heightened privacy concerns. SimpleX Chat is developed by SimpleX Chat Ltd, a commercial company. The project began full-time development in 2021, initially supported by angel investors including Portman Wills and Peter Briffett. In July 2022, it raised approximately $370,000 in pre-seed funding, including from Village Global. In August 2024, SimpleX Chat announced a $1.3 million pre-seed investment led by Jack Dorsey, with participation from Asymmetric Capital Partners. The company has stated that user donations play a significant role, covering infrastructure costs and supporting development, with collective donations exceeding $25,000 as of 2023.