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YC W25 · Active

Thirdlayer

Continual learning for enterprise AI

Class
Winter 2025
Status
Active
Industry
B2B
Location
San Francisco, CA, USA
Team size
2

Website

https://thirdlayer.inc

About

ThirdLayer is the learning and alignment layer for enterprise AI. We continuously ingest and structure messy organizational context, complex operational processes, and siloed, permission-sensitive data, then grade agents against the outcomes each company cares about. Every interaction becomes feedback that helps agents improve over time. Companies use ThirdLayer to power their internal agents or embed it into the AI products they’re building. We give agents the context, evaluations, and learning loops they need to stay aligned with each organization and deliver better outcomes with every run.