Notebook Labs
Shut down
What they do:
Decentralized, anonymous, and accountable identity on Web3.
Quick facts:
HQ: San Francisco, CA, United States
Top Startups in California
This list has 3,698 startups and was last updated on Oct 15, 2026. 827 of them are hiring right now. Biggest hubs: San Francisco (3,173), Los Angeles (197), and San Diego (39). Largest teams: DoorDash, Stripe, and Airbnb. Latest round: Renue Life Sciences raised $250K (Oct 14, 2026).
3,698 startupsPage 94 of 103
Stellar
Shut down
What they do:
AI-powered business goals
Quick facts:
HQ: San Francisco, CA, United States
Grai
Shut down
What they do:
Open source version control for metadata
Quick facts:
HQ: San Francisco, CA, United States
Argovox
Shut down
What they do:
Voice AI agents for patient billing and collections
Quick facts:
HQ: San Francisco, CA, United States
OpenSight
Shut down
What they do:
AI-powered customer support automation for fast-growing companies
Quick facts:
HQ: San Francisco, CA, United States
OutSail Technologies
Shut down
What they do:
Revolutionary, Modern Wing Sails
Quick facts:
HQ: San Francisco, CA, United States
CraftOS
Shut down
What they do:
Inventory Management and POS for the Wine industry
Quick facts:
HQ: San Francisco, CA, United States
Sidenote
Shut down
What they do:
Meeting follow-up, automated
Quick facts:
HQ: San Francisco, CA, United States
Line.Build
Shut down
What they do:
Incentives and financing for energy efficiency upgrades
Quick facts:
HQ: San Francisco, CA, United States
Lantern
Shut down
What they do:
Postgres vector database extension to build AI applications
Quick facts:
HQ: San Francisco, CA, United States
Blume Benefits
Shut down
What they do:
The AI copilot for health insurance brokers.
Quick facts:
HQ: San Francisco, CA, United States
Fileforge
Shut down
What they do:
API For PDF Document Workflows
Quick facts:
HQ: San Francisco, CA, United States
Percival
Shut down
What they do:
Accelerating data analysis for research
Quick facts:
HQ: San Francisco, CA, United States
Rovr
Shut down
What they do:
AI FDE Engine that runs your engineering workflows
Quick facts:
HQ: San Francisco, CA, United States
Couple
Shut down
What they do:
App that connects two phones and creates a private timeline to share…
Quick facts:
HQ: San Francisco, CA, United States
Minefold
Shut down
What they do:
Simple multiplayer game servers.
Quick facts:
HQ: San Francisco, CA, United States
Talkray (TiKL)
Shut down
What they do:
Instantly talk or text to one or a group of friends at once with the…
Quick facts:
HQ: San Francisco, CA, United States
Zillabyte
Shut down
What they do:
Palantir for sales people
Quick facts:
HQ: San Francisco, CA, United States
LVL6
Shut down
What they do:
We make mobile MMOs.
Quick facts:
HQ: San Francisco, CA, United States
Carsabi
Shut down
What they do:
Carsabi is the search engine for used cars
Quick facts:
HQ: San Francisco, CA, United States
Picplum
Shut down
What they do:
Picplum is a photo printing service that is the perfect addition to any family with young children. We know parents are too busy to organize their photos, let…
Quick facts:
HQ: San Francisco, CA, United States
Zigfu
Shut down
What they do:
Layer above Kinect.
Quick facts:
HQ: San Francisco, CA, United States
Dubjoy
Shut down
What they do:
Dubjoy translates and voice-overs your video to any language
Quick facts:
HQ: San Francisco, CA, United States
Zenbox
Shut down
What they do:
Brings dozens of SaaS's (Mailchimp, Stripe, Shopify, Salesforce,…
Quick facts:
HQ: San Francisco, CA, United States
Interstate
Shut down
What they do:
Create & Share Product Roadmaps
Quick facts:
HQ: San Francisco, CA, United States
Everyme
Shut down
What they do:
The #1 private social network
Quick facts:
HQ: San Francisco, CA, United States
Leaky
Shut down
What they do:
Online auto and business insurance. (Acquired 2013)
Quick facts:
HQ: San Francisco, CA, United States
Userfox
Shut down
What they do:
User retention as a service. Drip email
Quick facts:
HQ: San Francisco, CA, United States
Hungry Labs
Shut down
What they do:
Now part of Snaplayer.
Quick facts:
HQ: San Francisco, CA, United States
Beetailer
Shut down
What they do:
Facebook stores.
Quick facts:
HQ: San Francisco, CA, United States
TellFi
Shut down
What they do:
Google Voice for business.
Quick facts:
HQ: San Francisco, CA, United States
Assembled
Shut down
What they do:
Pivoted to TenXList, a professional network of top college engineers.
Quick facts:
HQ: San Francisco, CA, United States
Convore
Shut down
What they do:
Hosted IRC and so much more.
Quick facts:
HQ: San Francisco, CA, United States
Flotype
Shut down
What they do:
Third generation of web apps.
Quick facts:
HQ: San Francisco, CA, United States
TrustEgg
Shut down
What they do:
Trust funds.
Quick facts:
HQ: Culver City, CA, United States
Siasto
Shut down
What they do:
Siasto is a collaboration tool designed for SMBs who use Google Apps,…
Quick facts:
HQ: San Francisco, CA, United States