Top Tech Startups in California, US in 2024

Radiant Security is an autonomous MDR that automates security operations using machine learning and AI to triage and investigate incidents with consistency, accuracy, and scale only achievable via software. Deployed in minutes via API, Radiant Security provides rapid time to value and immediately reduces analyst workloads by as much as 95%. The solution uses a knowledge graph that continually learns about an organization’s security and IT environment, then employs an autonomous decision-making engine to emulate the processes used by a seasoned security analyst. This software-based approach to security operations radically reduces the time and cost of performing security operations, thus freeing up resources for other initiatives.

AllVoices is an anonymous reporting and communication platform that enables employees to safely report harassment, bias, culture issues, share feedback, and ask questions - directly to their company's leadership. Companies get reporting with a communication channel and data insights that help them improve company culture proactively.

Matter is on a mission to help companies build world-class cultures. Companies that use Matter experience employees who feel valued and recognized—leading to employees being 3x more engaged, 31% less likely to leave, and 91% more productive when they regularly receive recognition. Our platform empowers teams to celebrate wins, give recognition, and gather feedback directly within Slack and Microsoft Teams, making it simple to build a culture of appreciation. Matter was founded by Brett Hellman, a serial entrepreneur who previously founded Hall, which was acquired by Atlassian in 2015. Since then, Matter has been doubling revenue year over year and is proud to be a profitable, fast-growing startup. This is a unique opportunity to join at the ground floor of a company that’s scaling rapidly. If you’re looking to make an impact and be part of a high-growth journey, Matter is the place to be.

Mantle's 3D metal printing technology is significantly less complicated and less expensive than existing solutions. Our proprietary material science and machine design result in a printer that is smaller, safer and easier to deploy then anything in the market today. Mantle believes every company should have access to the new part geometries, rapid prototyping capabilities and distributed manufacturing benefits enabled by the additive manufacturing of metal parts.

At TalkDEI, we're revolutionizing supplier sourcing with AI-driven diversity solutions. Our platform empowers organizations to efficiently identify, engage, and track diverse suppliers, fostering inclusivity and compliance. With a commitment to driving positive change, we're dedicated to shaping a more diverse and equitable supply chain landscape. Join us in redefining supplier sourcing for a brighter, more inclusive future.

Second Order Effects (SOE) is a California-based engineering firm specializing in custom electronics and end-to-end electronic system design. We develop cross-disciplined solutions and products to solve some of the world’s most challenging problems by optimizing solutions beyond the first order. SOE tackles a wide range of projects in the aerospace, automotive, industrial, and commercial sectors. We design and build flight control systems, wireless communication devices, power electronics, analog sensor interfaces, mixed-signal circuits, motor drivers, system controllers, video cameras, embedded computers, and optical and RF amplifiers, sensors, and antennas. Our designs have gone into rocket engines, satellites, self-driving cars, automated systems, and household/retail consumer electronics.

Brand Knew is a creative collective and strategic advisory that partners with media companies, causes and consumer brands, towards meaningful audience and growth.

Our software helps business owners save on taxes with two core products: Corvee Tax Planning – Finds ways to cut down on taxes (Demo at corvee.com). Instead Implementation & Preparation – Simplifies tax rules for small businesses (Live at instead.com). Note: We are in process of rebranding from Corvee to Instead.com. The main product you will be working on will be at instead.com

Gr4vy is a cloud payments company that takes the complexity out of running your own payments infrastructure by doing it for you. We can deploy services on our cloud across the globe, deploying on the edge close to your customers. We can even allow you to host our services on your own networks. Centralized reporting, monitoring, and management mean all parts of your business will benefit from a single streamlined system, saving you time and money.

At Optivolt, we engineer next-gen power electronics for solar modules, enabling up to 60x more power in shaded conditions. Our technology is deployed with the National Oceanic and Atmospheric Administration, U.S. Air Force, and Ukraine Armed Forces, ensuring reliable solar energy production, even in the harshest environments on the planet. After proven success with our military partners, we’re bringing this technology to residential homes across the country. Millions of previously-disqualified homes are now eligible for solar power — rain, shine, or shade. Join our mission in making solar energy accessible for all, engineering a cleaner, sustainable future. With Optivolt, the future of solar energy is brighter than ever.