F4 Industries alternatives
TL;DR: 12 companies doing similar work to F4 Industries in Industrials, ranked by how closely they match what F4 Industries actually does — not just by category.
How this list was built: every company here is Y Combinator-backed and shares at least one category with F4 Industries. They are scored on how closely their own description overlaps with F4 Industries's, and all facts shown come from the YC company records — nothing is estimated.
What are the best alternatives to F4 Industries?
| Alternative | What it does | Batch | Team | Status |
|---|---|---|---|---|
| General Astronautics | Robotics for Space R&D | Winter 2026 | 2 | Active |
| 6thSense | Nervous System for Physical AI | Summer 2026 | 4 | Active |
| Farcast | We build advanced satcom user terminals | Winter 2020 | 12 | Active |
| General Instinct | Inference Infrastructure for Physical AI | Spring 2026 | 2 | Active |
| Ares Industries | Building low-cost cruise missiles | Summer 2024 | 2 | Active |
| Enhanced Radar | AI for air traffic control | Winter 2025 | 2 | Active |
| StableBrowse | Building the Data Infrastructure layer for Physical AI. | Spring 2026 | 3 | Active |
| Heart Aerospace | Heart makes electric airplanes with an all-electric range of 250 miles | Winter 2019 | 50 | Active |
| Inversion Space | Turning space into a transportation layer for Earth | Summer 2021 | 28 | Active |
| General Aviation | Fixing air traffic control with remote towers | Spring 2026 | — | Active |
| EPIC AEROSPACE | Last-mile delivery for satellites. | Summer 2019 | 14 | Active |
| Forerunner AI | AI that gets aircraft flying faster | Fall 2024 | 2 | Active |
Is F4 Industries still active?
F4 Industries is still operating, so switching is a choice rather than a forced migration. Compare on fit and price rather than urgency.
How was this list put together?
Every company here is Y Combinator-backed and shares at least one category with F4 Industries. They are then ranked on how closely their own description overlaps with F4 Industries's, so the closest matches come first rather than whoever happens to share a tag.