Attestable
Category: AI Safety
An AI trust-layer platform that provides a 'truth layer' for large language models, ensuring model outputs, prompts, and system integrity are verifiable and tamper-proof. Attestable was founded in 2025. The company is led by Yogev Bar-On. Based in Tel Aviv, Israel. Team size: 11-50. Total funding raised: $20M. Latest round: Seed. Key investors include TLV Partners, Altimeter Capital, Netz Capital, Cerca Partners, Halcyon Futures, Zero Knowledge Ventures, Assaf Rappaport, Charlie Songhurst, Nadir Izrael.
- Founded
- 2025
- Headquarters
- Tel Aviv, Israel
- Team size
- 11-50
- Total funding
- $20M
Value proposition
Eliminates the 'black box' problem of AI by providing cryptographic and mathematical proof of model reliability, enabling secure and compliant AI adoption in regulated industries.
Products and solutions
Zero-knowledge AI integrity / verification layer, ZK-proven LLM inference (production-scale proofs), Model-weight security / verifiable integrity for frontier labs, Privacy-preserving third-party verification of AI computation
Unique value
Founded by former SSI engineer Shahar Papini and CEO Yogev Bar-On (ex-Meta, RAND), applying advanced cryptographic techniques like Zero Knowledge Proofs (ZKP) to AI safety.
Target customer
Enterprise organizations deploying LLMs in production, AI safety and compliance teams, AI model developers, and third-party auditors.
Industries served
Artificial Intelligence, Cybersecurity, Financial Services, Healthcare, Legal & Compliance
Technology advantage
Practical zero-knowledge proofs for AI inference: cryptographically prove approved model/weights/inputs/policy produced an output without TEE trust, without revealing weights or private data; software-only, post-quantum, cross-hardware.
How they differentiate
Software-only ZK proofs that verify the right model ran on the right inputs without trusting datacenter hardware or TEEs; distinct from red-team/attack-simulation vendors (e.g. Irregular).
Main competitors
Irregular, Arthur AI, Cisco AI Defense (ex-Robust Intelligence)
Key partnerships
TLV Partners & Altimeter Capital (Seed co-leads), Prof. Shafi Goldwasser (Advisor; co-inventor of ZK proofs)
Notable customers
Early design partners in regulated industries (Financial Services, Healthcare)
Major milestones
Founded July 2025 by Yogev Bar-On, Shahar Papini (ex-SSI/StarkWare), Shahar Samocha (ex-StarkWare), Closed $20M Seed Nov 2025 co-led by TLV Partners and Altimeter Capital, Came out of stealth Aug 11 2026 announcing practical ZK proofs for AI integrity (85 tok/s on Meta Muse Glimmer 30B / H100)
Growth metrics
15 employees (Israel + California) as of Aug 2026; elite talent from SSI, StarkWare, 8200; Seed valuation previously reported ~$71M (Globes Feb 2026).
Market positioning
Deep-tech AI safety infrastructure provider for high-stakes enterprise deployments.
Geographic focus
Global (Headquartered in Israel with primary market focus on North America and Europe).
Patents and IP
Formal patents not yet publicly disclosed.
About Yogev Bar-On
PhD candidate (graduating) in CS at Tel Aviv University; RAND Meselson Center (co-author Securing AI Model Weights); founding team at Fordefi; Software Engineer at Meta; offensive/defensive cybersecurity background.
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Official website: https://attestable.com