
AdGuard has officially open-sourced the protocol that powers its VPN service, now named TrustTunnel, marking a major step toward transparency and broader community collaboration in the VPN space.
The protocol is designed to evade censorship, avoid traffic throttling, and maintain robust privacy protections, especially in restrictive network environments.
AdGuard is releasing the full specification, reference implementation, and cross-platform clients for TrustTunnel under a permissive Apache 2.0 license. According to the company’s announcement, this move fulfills long-standing user requests for transparency and reflects its commitment to Free and Open Source Software (FOSS) principles.
TrustTunnel explained
TrustTunnel is a modern VPN protocol that…