Psiphon is a free and open-source Internet censorship circumvention tool that uses a combination of secure communication and obfuscation technologies (VPN, SSH, and HTTP Proxy). It is designed to provide unrestricted access to Internet content while protecting the user’s privacy and security. Psiphon operates by connecting users through a network of servers, which are maintained by volunteers around the world, to bypass content-filtering systems employed by governments, corporations, and other institutions.

The tool automatically selects the most efficient protocol and server for the user, making it easy for those with little technical knowledge to bypass censorship. It is available on multiple platforms, including Windows, Android, and iOS, allowing a wide range of devices to access the Internet freely and securely.

Psiphon is often used in countries where the Internet is censored or where access to specific websites is blocked. It provides a valuable service for people trying to access information, communicate, and share their views freely online, despite restrictions placed on their ability to do so.

The project is run by Psiphon Inc., which continues to develop and improve the software to address new censorship and surveillance challenges as they arise, ensuring that the tool remains effective for users worldwide.