LinkedIn · Jul 2026
The company said users can now review drawings against ASME Y14.5-2009 or 2018, reinforcing its standards-coverage roadmap for regulated industrial customers.
Automating compliance checks for engineering drawings
Public company, workplace, funding, and market signals
Updated Jul 29, 2026
YC-backed manufacturing software startup in San Francisco that analyzes engineering drawings and 3D files to validate GD&T, generate stack-up/FAI reports, and help hardware teams release production-ready designs on-device.
Primary product
GD&T analysis software for engineering drawings
Founded
2025
Headquarters
San Francisco, California, United States
Team size
1-10 employees
Industry
Manufacturing
Sub-industry
GD&T analysis / engineering drawing compliance software
Offices
0 jobs at F4
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Business model
Stage
Pre-Seed
Total raised
$500K
Latest round
Pre-Seed · Oct 2025
Latest amount
$500K
Oct 2025 · Y Combinator
Investors
Engineering-first and hardware-native, with an emphasis on deterministic on-device analysis, security, standards compliance, and human-led review for regulated industrial and aerospace/defense workflows.
Pricing
Pro is self-serve and paid; Enterprise is contact-sales / negotiated; other terms can include pilot, trial, usage-based, or separately negotiated agreements.
Differentiators
Technology
Customers
Competitors
LinkedIn · Jul 2026
The company said users can now review drawings against ASME Y14.5-2009 or 2018, reinforcing its standards-coverage roadmap for regulated industrial customers.
LinkedIn · Jun 2026
F4 said it completed the ASME Y14.5-2018 knowledge layer, emphasized deterministic on-device analysis, and noted it had supported OEMs on aerospace and defense programs.
LinkedIn · Apr 2026
The company announced Paul H. Shin became an ASME GDTP-T09 certified engineer and said the team uses that expertise to build its GD&T analysis platform.
LinkedIn · Jul 2025
Paul H. Shin announced F4 Industries as part of YC S25 and framed the company around automating engineering drawing compliance to reduce scrap, rework, and miscommunication.