Silverfort, an Israeli identity security company valued as a unicorn, said on 28 April 2026 that it had acquired Fabrix Security, a Tel Aviv startup that uses AI agents to help identity and access management teams decide who and what should be allowed into corporate systems.
Neither company disclosed the price. Calcalist, the Israeli business daily, reported the same day that the deal was estimated at tens of millions of dollars. Fabrix had been operating for about a year, according to Calcalist, and all 14 of its employees were set to join Silverfort.
Silverfort said it would combine Fabrix's real-time AI decision engine with its own Runtime Access Protection technology. Most of the joint capabilities were expected to reach customers in the second half of 2026.
What Fabrix built
Fabrix described itself as an AI-native identity security company. Its software uses AI agents to help IAM teams make access decisions that can be explained after the fact, covering authorisation, just-in-time access and the management of an identity's lifecycle from creation to removal.
The idea behind the product is that access rules written in advance cannot keep pace with the number of identities inside large companies, which now include service accounts, machine credentials and AI agents as well as employees. Calcalist described the joint goal as an engine that decides in real time which systems each identity, whether human, non-human or an AI agent, may reach.
Silverfort listed several capabilities it planned to build from the combination: AI-driven authorisation for humans, machines and AI agents; AI agents that help customers run the Silverfort platform itself; wider just-in-time access coverage; and an identity knowledge graph that maps relationships between users, systems and permissions.
“Today, Identity Security and access control rely on rules that are created at ‘admin time’, attempting to pre-define access. But in the AI era, it’s becoming impossible to keep up, and organizations are rapidly losing control. The only way to mitigate this risk without stopping the business is to make access decisions at runtime, using AI and deep context.”
Why Silverfort is buying
Silverfort sells identity protection that enforces policies at the moment a user or system authenticates, rather than relying only on permissions set in advance. The company said the Fabrix technology would let it bring what it calls autonomous identity security to its more than 1,000 customers.
In the announcement, Silverfort co-founder and chief executive Hed Kovetz argued that access policies defined by administrators ahead of time can no longer keep up in the AI era, and that the alternative is to make access decisions at runtime using AI and context about each request. He also cited Fabrix's track record across AI, security and identity as the expertise Silverfort needed.
Fabrix chief executive Raz Rotenberg said the startup had been founded to make identity security easier, faster and more scalable through an AI-native approach, and that pairing its engine with Silverfort's runtime enforcement would extend that work to large enterprises.
The founders and the funding
Fabrix was founded in 2025, according to Calcalist. Rotenberg, its chief executive and co-founder, was previously a founding engineer at Run:ai, the AI infrastructure company that Nvidia acquired. Co-founder and chief technology officer Ofir Yakovian was a tech lead at Orca Security and at Microsoft Entra, Microsoft's identity product line, and holds a master's degree in quantum computing.
The company's vice president of research and development, Roee Oz, was previously chief architect for Microsoft Defender for Cloud and led Microsoft's AI security incubation effort.
Fabrix raised $8 million in seed funding from Norwest, toDay Ventures and Jibe Ventures. Founders and executives from Google, Palo Alto Networks, Cyera, Microsoft, Tenable and Nvidia also invested as individuals. The companies did not say what return the deal produced for those backers.
Silverfort's second Israeli identity deal
The purchase is not Silverfort's first. In November 2024 it bought Rezonate, an Israeli startup focused on cloud identity security, in a deal that Calcalist also put at several tens of millions of dollars.
Calcalist reported that Silverfort has raised more than $222 million in total, including a $116 million Series D in 2024, and employs about 600 people, roughly half of them in Israel. With Fabrix, the company adds a small research team in Tel Aviv working on the use of AI agents in access control, an area where established identity vendors are also building products for machine and agent identities.
