B2B startups in El Segundo. 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.

We provide efficient in-space mobility that moves payloads from low Earth orbit to any destination. Our vehicles deliver rapid, reliable access, reducing costs and timelines to make space operations feasible for commercial, government, and scientific missions.
This SEC filing entity shares Castelion's Torrance, CA address; founded in 2022 by three former SpaceX executives, it raised a $1 billion Series C led by Carlyle, JPMorgan Chase and Andreessen Horowitz.
Advanced material solutions—from AI-driven design to agile U.S. manufacturing—for defense, aerospace, & high-performance applications
Legal name of Flip, the TikTok-style social shopping app headquartered in El Segundo, CA; the company raised $144M and reached a $1B valuation before shutting down in August 2025.
Founded by CEO Ryan Schonfeld, the physical-security software company has raised over $65M, including a Series B led by Anthos Capital, with early backing from well-known angel investors Elad Gil and Lachy Groom.
ABL Space Systems is a company based in El Segundo, California, focused on launch vehicle and launch systems technology development.

Matter Intelligence is pioneering a new ultraspectral vision ecosystem that sees molecular chemistry, unlocking superintelligent vision for the physical world.

Mapped turns any building's systems, sensors, and devices into a structured, real-time world model — the data foundation AI agents and applications need to understand and act on the physical world.
Sift is the unified observability platform for mission-critical hardware—ingest, store, and analyze telemetry at scale across aerospace, defense, and robotics.

The integrated platform for the electromagnetic spectrum. One platform for RF design, production, and network operations.

Multi-touch attribution and media mix modeling for profitable growth, powered by industry-leading machine learning models. Discover how Northbeam can transform your marketing.

Picogrid delivers integrated systems for modern missions, connecting sensors, platforms, and operators across land, sea, air, and space.
General Galactic builds advanced spacecraft for sustained maneuver and more time on-mission across the space domain

Pixxel is a space data company and spacecraft manufacturer redefining Earth observation through high-resolution hyperspectral imaging and advanced analytics.

Discover Balboa Geolocation's cutting-edge geolocation solutions for defense and commercial markets, ensuring accuracy in challenging environments.
.png)
Incentify is the platform for discovering and managing tax credits and incentives across 1,200+ federal, state, and zone programs with AI-powered eligibility matching and automated compliance tracking.
The LA protein-nutrition company is backed by Keurig Dr Pepper and Madison Square Garden Sports, and rebranded its protein soda line as SkyPop.

At Higala, we are committed to making digital financial infrastructures resilient, modern, and inclusive for financial institutions, businesses, and individuals everywhere.

NMBLR helps enterprises build, own, and scale AI across their organization. Get the foundation, capabilities, and systems to drive real outcomes with AI.
Berri creates organic, plant-based electrolyte drinks designed for clean hydration and active living. No artificial ingredients—just powerful, natural performance.

Golf training studios with expert coaching, tour-level tech, fitness training, and custom club fitting. Locations in AZ, CA, and TX.