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F4 Industries

YC S25

San Francisco, US · Founded 2025 · 5 employees · 7 known investors

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F4 is a platform for analyzing, validating, and visualizing GD&T (geometric dimensioning and tolerancing) in engineering drawings. It serves industrial teams including manufacturers, aerospace, and defense organizations by automating the interpretation of design files from CAD platforms and generating compliance reports.

Also known as F4 · F4, F4 Industries, F4

Advanced ManufacturingDeveloper ToolsHardwareSpace TechB2BIndustrialUnited States of AmericaAmerica / Canada

Founders & leadership· Y Combinator alumni (S25)

F4 Industries was founded in 2025 by Paul Shin and Aidan Cantu.

PSPaul Shin
Paul ShinCEO & Co-FounderHe previously worked as a mechanical design engineer at Tesla, where he oversaw multiple CyberCab and SEMI production components and managed the global drive unit heat exchanger program. Earlier, he conducted research in liquid-bipropellant rocketry at the University of Arizona and UC Berkeley.
ACAidan Cantu
Aidan CantuCo-founder · Chief Technology OfficerPreviously, he worked as an avionics test engineer at SpaceX, where he focused on hardware design for engine testing. He holds dual degrees in electrical engineering along with minors in computer science and mathematics.

Investors · 7

468 CapitalreportedBerlin

How we know: the VCSheet dataset · Y Combinator's founder network · Not right? Tell us

Aliaksandr Hudzilinreported

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Crystal Towers CapitalreportedMountain View

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Decacorn CapitalreportedSingapore · $300K – $600K

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Golden Gate VenturesreportedSingapore · $1M – $5M

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Twenty Two VenturesreportedPalo Alto · $50K – $250K

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Related companies · 4

Cascade SpaceCascade Space develops software tools and infrastructure for designing, building, testing, and operating spacecraft communication systems. The company serves aerospace and space companies seeking to accelerate development with reduced team requirements.
Forge AutomationForge Automation manufactures custom metal parts on demand for mechanical engineers, with parts delivered within four days through an online CAD upload process. The company operates software-controlled factories to shorten typical lead times in the custom machining industry.
DartboardDartboard Energy processes raw alarms and state data from industrial systems into classified events with audit trails, eliminating manual log reconstruction for energy and industrial operations. The platform reads data from data lakes, historians, and energy management systems, then writes structured events back to existing workflow tools.
MOVEdotMOVEdot is an AI platform that integrates engineering data from multiple sources—telemetry, simulations, and documents—and uses AI agents to analyze it and run simulations for physical engineering teams. It serves engineering organizations in automotive, racing, and manufacturing by providing shared workspaces for teams to collaborate on data-driven decision-making.

Companies working in the same space as F4 Industries.

Legal entities · 1

corporate structure
F4 Industries, Inc.

In the news

F4 - The GD&T Analysis Platform for Engineering Drawingsycombinator.com · Mar 2026F4 - Automated compliance checks for engineering drawingsycombinator.com · Aug 2025F4 Industries Funding: $1M | Complete Analysis | Extruct AIextruct.ai

Frequently asked questions

What does F4 Industries do?
F4 is a platform for analyzing, validating, and visualizing GD&T (geometric dimensioning and tolerancing) in engineering drawings. It serves industrial teams including manufacturers, aerospace, and defense organizations by automating the interpretation of design files from CAD platforms and generating compliance reports.
Who founded F4 Industries?
F4 Industries was founded by Paul Shin, Aidan Cantu in 2025.
Who are F4 Industries's investors?
F4 Industries's investors include Y Combinator, 468 Capital, Aliaksandr Hudzilin, Crystal Towers Capital, Decacorn Capital, Golden Gate Ventures, Twenty Two Ventures.
Where is F4 Industries headquartered?
F4 Industries is headquartered in San Francisco, US.