Phoenix Hydrogen
Shut down
What they do:
First commodity marketplace for hydrogen.
Quick facts:
HQ: San Francisco, CA, United States
Top Deep Tech Startups in the United States
This list has 1,393 startups and was last updated on Oct 16, 2026. 306 of them are hiring right now. Biggest hubs: San Francisco (705), New York (137), and Los Angeles (79). Largest teams: DoorDash, EquipmentShare, and GrubMarket. Latest round: Mercer MotorWorks raised $155K (Oct 15, 2026).
1,393 startupsPage 39 of 39
Overflux
Shut down
What they do:
Streamline EV charger installations for real estate developers
Quick facts:
HQ: Los Angeles, CA, United States
Choppy!
Shut down
What they do:
FAST FLAVORFUL PROTEIN
Quick facts:
HQ: Los Angeles, CA, United States
Serial
Shut down
What they do:
Root cause manufacturing issues in seconds
Quick facts:
HQ: San Francisco, CA, United States
deepsilicon
Shut down
What they do:
Software and hardware to run neural networks faster and cheaper
Quick facts:
HQ: San Francisco, CA, United States
Kanava AI
Shut down
What they do:
Your First AI Sales Hire for Wholesale Distributors
Quick facts:
HQ: San Francisco, CA, United States
Kyten Technologies
Shut down
What they do:
Custom Aerospace-Grade Battery Packs
Quick facts:
HQ: Seattle, WA, United States
WATERFX
Shut down
What they do:
The world's first 100% sustainable water provider (aka alternative…
Quick facts:
HQ: CA, United States
Hideout
Shut down
What they do:
A portfolio of delivery-only restaurant brands
Quick facts:
HQ: Los Angeles, CA, United States
Trident Bioscience
Shut down
What they do:
Accelerating protein engineering.
Quick facts:
HQ: San Francisco, CA, United States
Outfit
Shut down
What they do:
DIY renovations in a box. Materials, tools, and instructions delivered
Quick facts:
HQ: New York, NY, United States
Wattvision
Shut down
What they do:
Sensors and software for energy tracking. Like 'fitbit' for your…
Quick facts:
HQ: Princeton, NJ, United States
CO2Stats
Shut down
What they do:
Social and environmental web analytics. Acquired in December 2016.
Quick facts:
HQ: Boston, MA, United States
YC S08Early stage
RoverRide
Shut down
What they do:
A universal urban transit app. Given all transportation options…
Quick facts:
HQ: San Francisco, CA, United States
YC W13Early stage
Logiblock
Shut down
What they do:
Logiblock engineers electronics and development tools to dramatically…
Quick facts:
HQ: San Francisco, CA, United States
YC W13Early stage
Yumbin
Shut down
What they do:
App replaces office vending.
Quick facts:
HQ: San Francisco, CA, United States
YC W14Early stage
Ohm
Shut down
What they do:
Never jump start your car again.
Quick facts:
HQ: San Francisco, CA, United States
YC S15Early stage
Silver
Shut down
What they do:
Low cost consumer device for toxin detection.
Quick facts:
HQ: San Francisco, CA, United States
YC W16Early stage
Pearl
Shut down
What they do:
The future of office coffee. Keurig convenience meets cafe quality.
Quick facts:
HQ: San Francisco, CA, United States
YC W17Early stage
Modular Science
Shut down
What they do:
We're making it easier to do sustainable farming.
Quick facts:
HQ: San Francisco, CA, United States
YC S17Early stage
Nutrigene
Shut down
What they do:
Personalized liquid supplements based your health data
Quick facts:
HQ: San Francisco, CA, United States
YC W18Early stage
Spero Foods
Shut down
What they do:
dairy reinvented from plants
Quick facts:
HQ: San Francisco, CA, United States
YC S18Growth stage
Canopi
Shut down
What they do:
API to measure and eliminate carbon emissions
Quick facts:
HQ: San Francisco, CA, United States
Boost Biomes
Shut down
Quick facts:
HQ: Brisbane, CA, United States
Laguna
Shut down
Quick facts:
HQ: New York, NY, United States