Atsign Reviews for 2025

What is Atsign?

Atsign provides privacy-first networking technology that removes the need for traditional network exposure while maintaining secure connectivity between devices, services, and users. Its core innovation, the atPlatform, enables direct, encrypted communication without requiring open ports or VPNs.

Instead of relying on IP-based addressing, Atsign’s approach uses identifiers known as @signs, allowing entities to exchange data privately over the Internet. This architecture minimizes attack surfaces and eliminates many vulnerabilities tied to conventional networking models.

The NoPorts solution, powered by the atPlatform, demonstrates Atsign’s applied security model for industrial and IoT environments. It allows secure remote access to devices—such as servers, PLCs, or IoT hardware—without exposing them to the public Internet. All connections are outbound-only, authenticated, and end-to-end encrypted, which means no inbound ports, static IPs, or complex firewall configurations are required.

Atsign also supports developers through its open-source SDKs and detailed documentation. It provides tools to build secure-by-design applications across industries, including manufacturing, healthcare, and telecommunications. With a focus on user data ownership and decentralized access control, Atsign’s mission is to make privacy the default for connected systems.