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YCS25· AI

F4 Industries

The GD&T Analysis Platform for Engineering Drawings

ActiveChecked 20h ago
Batch
S25
Status, per YC
Active
Team size
5
HQ
San Francisco, CA
In S25166 companies, 92% AI
f4.devYC profile LinkedIn

Founders

  • Paul ShinFounder/CEO
  • Aidan CantuFounder/CTO

Same space

About F4 Industries

GD&T takes years to master. Engineers must encode their design intent into a dense syntax that manufacturers must decode, and not everyone gets it right. Put ten engineers in front of the same drawing and you may get ten different interpretations. Which means errors often surface later in interface stack-ups, manufacturing, or in the field - when they’re far more expensive to fix. That’s why we built F4 - the platform that analyzes GD&T to determine whether your designs are ready for production. Drop in your drawing and 3D file. F4 analyzes every element of your GD&T to assess whether your design is clear, manufacturable, and production ready. To make the drawing easier to understand, engineers can visualize their datums, reference frames, and tolerance zones directly on the 3D model. F4 also calculates tolerance stack-ups instantly - directly from the drawing. What once took hours of manual work now takes seconds. When issues are found, F4 flags them and guides engineers toward resolving the problem. After analyzing your drawing, F4 also automatically generates design and inspection reports - stack-up tables, FAI reports - ready to share with your team. And it does all of this locally on-device with no AI used for analysis. Producing deterministic results engineers can trust.

San Francisco, CA, USA

F4 Industries: questions

Which YC batch was F4 Industries in?

F4 Industries was in Y Combinator's Summer 2025 batch (S25).

Is F4 Industries still active?

Y Combinator lists F4 Industries as active.

Who founded F4 Industries?

F4 Industries's founders, as listed on its YC page: Paul Shin (Founder/CEO), Aidan Cantu (Founder/CTO).

Where is F4 Industries based?

F4 Industries lists San Francisco, CA, USA as its location on YC's directory.

Not affiliated with Y Combinator. From YC's public directory. Logos via logo.dev; trademarks belong to their owners.

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