Southern California's
Tech
Startup Directory
Showcasing Southern California's innovation, one startup at a time. Every funded and bootstrapped company, from seed round to first dollar of revenue, tracked as it happens.
Includes SEC Form D filings from the last 3 years, plus all-time totals for companies sourced from YC and news coverage.
Artificial Intelligence
The region's largest single cluster by company count — AI and machine learning threaded through nearly every other industry here, from defense to biotech to entertainment.
Aerospace & Defense
Home to SpaceX, Northrop Grumman, and a new wave of hypersonics and space-infrastructure startups.
Entertainment & Gaming Tech
Hollywood's production infrastructure, live events, and a growing games and creator-tools scene.
Semiconductor Hardware
Qualcomm and Broadcom anchor a chip-design cluster spanning the region.
Medical Technology
A deep biotech research base and a growing bench of medical device and diagnostics startups.
B2B
Business software and services sold to other companies. The largest single category of startup across Southern California, spanning sales tools, vertical operating systems, and everything in between.
Industrials
Manufacturing, hardware, and physical-world operations. Overlaps heavily with the region's decades-old aerospace and defense manufacturing base, now extending into robotics and automated production.
Consumer
Products and apps built directly for individual consumers, drawing on Southern California's media and entertainment base.
Healthcare
Health tech, medical devices, and healthcare services, backed by a decades-old biotech research base and a deep bench of clinical and diagnostics startups.
Fintech
Financial technology: payments, banking, investing, and financial infrastructure.
Education
Education technology and learning platforms built across Southern California.
Real Estate & Construction
Property technology, construction tech, and real estate services.
Series D$53.0MTide Rock YieldCo is a fund vehicle of Tide Rock, an unlevered private-equity buyout firm based in Solana Beach, CA that acquires profitable B2B companies without using bank debt and holds them for cash flow rather than exits.
Series D$26.8MModifying lipid-signaling pathways to improve treatments for people living with cancer
Series D$25.0MPersonalized, two-way SMS, WhatsApp, Apple Messages, RCS, and more. No algorithms. No noise. Just your Community.
Series D$21.8MThe key to managing cancer is early detection. ClearNote Health makes this possible by finding signals of cancer in the blood early
Series D$20.0MKiora Pharmaceuticals is a publicly traded, clinical-stage biopharmaceutical company (Nasdaq: KPRX) developing treatments for retinal disease, led by CEO Brian Strem.
Series D$20.0M
Series D$14.4MCarbonBuilt produces ultra-low-carbon concrete masonry using upcycled, low-carbon binder to replace cement. Affordable and ready for real-world construction.
Series D$12.9MEverest Properties is a privately-held real estate investment firm specializing in acquisition, recapitalization, and asset management of real estate.