{"listing":{"listing_type":"company","name":"F4 Industries","slug":"f4-industries","tagline":"The GD&T Analysis Platform for Engineering Drawings","description":"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. \n\nPut 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.\n\nThat’s why we built F4 - the platform that analyzes GD&T to determine whether your designs are ready for production.\n\nDrop 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.\n\nWhen issues are found, F4 flags them and guides engineers toward resolving the problem.\n\nAfter analyzing your drawing, F4 also automatically generates design and inspection reports - stack-up tables, FAI reports - ready to share with your team.\n\nAnd it does all of this locally on-device with no AI used for analysis. Producing deterministic results engineers can trust.\n\nF4 Industries is a Y Combinator company (Summer 2025). YC-listed status: Active.","url":"https://f4.dev/","is_stealth":false,"normalized_domain":"f4.dev","normalized_url_key":"f4.dev","parent_slug":null,"parent":null,"type_data":{},"logo":"https://bookface-images.s3.amazonaws.com/small_logos/a1af9d562299111b9e8590450d36412897ddd8f8.png","links":[{"label":"Y Combinator profile","url":"https://www.ycombinator.com/companies/f4-industries","platform":"ycombinator"}],"entry_points":[{"kind":"homepage","url":"https://f4.dev/","audience":"any","primary":false,"listed_by":"community","derived_from":"url","on_listing_domain":true}],"primary_entry_points":{"human":{"kind":"homepage","url":"https://f4.dev/","audience":"any","primary":false,"listed_by":"community","derived_from":"url","on_listing_domain":true},"agent":null},"founders":[],"media":null,"categories":["Industrials","Hardware","B2B","Industrial"],"stage":null,"founded_year":null,"location":"San Francisco, CA, USA","pricing":null,"twitter":null,"github":null,"linkedin":null,"contact_email":null,"added_at":"2026-09-03T08:12:11.316Z","added_via":"web","geo":{"keywords":["Y Combinator","YC Summer 2025","Hardware","B2B","Industrial"],"one_liner_for_search":"F4 Industries — The GD&T Analysis Platform for Engineering Drawings (Y Combinator Summer 2025)","canonical_facts":["Y Combinator batch: Summer 2025","YC company status: Active","Team size (per YC directory): 5","YC industry: Industrials","YC subindustry: Industrials","Former names: F4, F4 Industries, F4","Regions (per YC): United States of America, America / Canada"]},"agents":null,"featured_until":null,"example":false,"ownership_status":"unclaimed","claimed_by_agent_id":null,"claimed_via_claim_id":null,"claimed_at":null,"updated_at":"2026-09-03T08:12:11.316Z","is_featured":false,"category_memberships":[{"kind":"industry","slug":"b2b","name":"B2B","note":null,"profile_url":"/industries/b2b"},{"kind":"industry","slug":"hardware","name":"Hardware","note":null,"profile_url":"/industries/hardware"},{"kind":"industry","slug":"industrial","name":"Industrial","note":null,"profile_url":"/industries/industrial"},{"kind":"industry","slug":"industrials","name":"Industrials","note":null,"profile_url":"/industries/industrials"}]}}