About Atsign

Securing the future of agentic AI

As artificial intelligence transforms how software is engineered, Atsign technology acts as the essential security boundary for automated applications. Our newest tool, Atsign AI Architect, connects rapid development with ironclad security. By combining visual system blueprinting with autonomous code generation, AI Architect allows both developers and non-technical experts to translate complex business logic into secure software in days instead of months.

Moving cryptographic identity, end-to-end encryption, and networking to a platform layer with no open inbound ports completely removes the traditional network attack surface. Because these high-risk security foundations are built into the platform by default, creators can safely use AI tools to generate application features without worrying about security misconfigurations or data exposure. The result is a universal standard for modern development where sensitive data remains completely private, software vulnerabilities are eliminated by default, and human authority remains absolute.

Meet the Team

Executive Leadership

Aparna Rayasam

CEO

Aparna Rayasam is the Chief Executive Officer of Atsign, where she leads the company’s mission to deliver foundational security and governance for the emerging era of agentic AI. With over 28 years of leadership experience at top-tier technology companies, including Akamai, Palo Alto Networks, and F5, Aparna is a recognized specialist in product-led transformation and enterprise revenue scaling. She has a proven history of growing early-stage security portfolios into multi-billion-dollar market leaders, with deep expertise in product strategy, platform architecture, and threat research.

Colin Constable

Co-founder, CTO

Colin Constable is the CTO and co-founder of Atsign, a company building the next generation of Internet technology with simplicity, security, and privacy built in. He is a technologist with 40 years of experience in the telecommunications and internet industries. Colin’s credits include his career at British Telecom, CTO at Credit Suisse Bank, then heading to Silicon Valley for strategy work at Juniper Networks and co-founding Deutsche Bank Labs. Colin is passionate about privacy and security, and he believes that Atsign can help to create a more open and decentralized internet.