YC's Weave raises $13.5M to measure whether AI coding tools actually pay off

ycombinator · x · 2026-11-05

Weave (W25) helps engineering teams verify whether AI coding tools actually boost productivity, measuring human and agent output against AI spend. It raised a $13.5M Series A led by Standard Capital and launched Weave Router, which picks models per coding task. In this YC fireside, co-founders Adam Cohen and Andrew Churchill cover measuring agent output beyond lines of code, moving from adoption to optimization and ROI coaching, building autonomous 'software factories', and the future of model routing.

Related event: YC-Backed Weave Raises $13.5M to Measure Real AI Coding Output(2 posts)→

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