RefortifAI

RefortifAI is a Y Combinator-backed company that secure Deployment & DRM for AI model providers. Based in San Francisco, USA, the company participated in the Spring 2026 batch of Y Combinator.

RefortifAI provides DRM and IP protection for AI models by obfuscating model weights so they only run inside their hardened runtime, letting companies distribute models to untrusted environments without exposing their IP. It works as a drop-in replacement for existing inference engines (vLLM, SGLang, etc.), so customers deploy normally while weights stay protected.

RefortifAI was part of Y Combinator's Spring 2026 cohort, has a team of approximately 3 employees, and is actively operating.