Attestable, an Israeli cybersecurity startup developing technology to verify the behavior of artificial intelligence systems, has raised $20 million in Seed funding led by TLV Partners and Altimeter Capital, with participation from Netz Capital, Cerca Partners and private investors including Assaf Rappaport, Yevgeny Dibrov, Nadir Izrael, Sharin Fisher Dibrov and Charlie Songhurst, a board member at Meta. The company was founded in 2025 by three mathematicians: CEO Yogev Bar-On, CTO Shahar Papini and VP of R&D Shahar Samocha. Papini previously worked at StarkWare and later at Ilya Sutskever’s AI company Safe Superintelligence (SSI). Attestable is developing technology that allows organizations to verify which calculations an AI system is performing and what information it is using, without exposing the model itself or the sensitive data involved. The technology is aimed at organizations using AI for critical processes where security, resilience and reliability are essential. Attestable's technology is based on zero-knowledge proofs, a field of cryptography that allows one party to prove that a statement is true without revealing the underlying information used to prove it. The company says it has achieved a mathematical breakthrough that makes it possible to apply the technology to AI systems and generate rapidly verifiable proofs of how a model operates while keeping both the model and sensitive information confidential. The company's longer-term ambition is to develop a technology that can be used by major AI labs to protect