
Atsign is a cybersecurity company that has developed the patented, open-spec atProtocol and the open-source atPlatform to enable secure, private communication for people, entities, and things over the Internet. Their technology fundamentally rethinks cybersecurity by making users, cloud instances, servers, AI agents, and devices invisible to cyber attackers, thus eliminating attack surfaces. The atPlatform supports secure data exchange, access control, and collaboration without relying on passwords or network-based security, using cryptographic identity and end-to-end encryption. It is designed to protect critical infrastructure, IoT devices, AI systems, and cloud infrastructure with a federated, distributed, and privacy-first architecture that scales efficiently and reduces costs. Atsign's business model includes partnerships with system integrators, IT solution providers, and security consultants to deliver their security solutions. The company is recognized for its innovation and has been featured in various media and industry events.

Atsign is a cybersecurity company that has developed the patented, open-spec atProtocol and the open-source atPlatform to enable secure, private communication for people, entities, and things over the Internet. Their technology fundamentally rethinks cybersecurity by making users, cloud instances, servers, AI agents, and devices invisible to cyber attackers, thus eliminating attack surfaces. The atPlatform supports secure data exchange, access control, and collaboration without relying on passwords or network-based security, using cryptographic identity and end-to-end encryption. It is designed to protect critical infrastructure, IoT devices, AI systems, and cloud infrastructure with a federated, distributed, and privacy-first architecture that scales efficiently and reduces costs. Atsign's business model includes partnerships with system integrators, IT solution providers, and security consultants to deliver their security solutions. The company is recognized for its innovation and has been featured in various media and industry events.
Sector: Cybersecurity / Networking
Core product: atPlatform (open-spec atProtocol, open-source atPlatform, SDKs)
Founded: 2019
Notable funding: Seed round announced 2021-07-06
Team size (example source): 27 employees (snapshot)
Cybersecurity for identities, devices, IoT, cloud infrastructure, and AI systems; zero-trust connectivity and private data exchange.
2019
Cybersecurity
Seed round announced July 6, 2021; Crunchbase lists Kirk Brown as lead/sole investor.