Matan Bar-Efrat is the co-founder and CEO of Rein Security, a runtime security platform for enterprise AI agents that he started in 2024 with CTO Netanel Rubin. Rein raised a $25M Series A in October 2026 co-led by Glilot Capital and Sienna Venture Capital. A Unit 8200 veteran with 14 years in cybersecurity, he previously spent about seven years selling and scaling security products in Europe at Cyberbit and Elbit Systems, then advised early-stage startups on go-to-market strategy.
Matan Bar-Efrat is the co-founder and CEO of Rein Security, a runtime security platform for enterprise AI agents that he started in 2024 with CTO Netanel Rubin. Rein raised a $25M Series A in October 2026 co-led by Glilot Capital and Sienna Venture Capital. A Unit 8200 veteran with 14 years in cybersecurity, he previously spent about seven years selling and scaling security products in Europe at Cyberbit and Elbit Systems, then advised early-stage startups on go-to-market strategy.