Synack is a Human + AI penetration testing platform that combines the speed and scale of agentic AI with the judgment and creativity of highly vetted security researchers. Together, they deliver trusted security testing at scale, from point-in-time assessments to continuous penetration testing.
Built for security teams managing complex attack surfaces, the Synack platform helps organizations expand testing coverage, validate real-world exploitability, and gain greater control over risk, cost, and outcomes.
Founded in 2013 by former NSA cybersecurity operators, Synack was created to bring rigorous adversarial thinking to modern enterprise security. The company has enabled nearly 10 million hours of expert, hands-on testing to protect some of the world’s most sensitive infrastructure, from global financial systems to U.S. Defense Department networks.
In October 2026, Synack and NetSPI completed their merger. Together, the companies bring nearly 40 years of combined operating history and more than 13 million hours of real-world offensive security testing, serving top cloud providers, top U.S. banks, the Fortune 100 and U.S. federal agencies.
This combination of agentic AI, proven human expertise, and more than a decade of offensive security experience positions Synack as a trusted leader in penetration testing and continuous security validation.
Synack takes its name from the TCP three-way handshake: SYN, SYN-ACK, ACK, the exchange that establishes a connection between two systems. That idea of connection inspired our name and our approach to cybersecurity. From the beginning, Synack has brought technology and human intelligence together, combining the scale and speed of technology with the ingenuity and judgment of security experts. SYN + ACK became Synack.
