Top Tech Startups in California, US in 2026

As passionate scientists and engineers, we are well aware of the plethora of critical problems in the world that cannot be solved because humanity simply does not have enough computing power. To address this, Vorticity is developing a radically new silicon chip architecture and system to dramatically accelerate scientific computing problems. Vorticity’s mission is to expand human ingenuity. To do that we are building a team of exceptional people to work together on big problems. Join us!

AnySignal was developed to reimagine how RF capabilities are delivered for the most difficult tasks around the globe. offers complete solutions for modern aircraft, satellites, and national security that span communications, radar, navigation, and RF sensing. Current solutions are overpriced, unimaginative, and provide little end-to-end capability. To shift this paradigm, they are bringing the appropriate talent, procedures, and technologies together. They are developing communications systems for satellites, launchers, space stations, and aircraft. They provide full-stack connectivity solutions that include software modems, hardware for use in flight and on the ground, data management software, ground station integration software, and vehicle telemetry software.

Prime Intellect democratizes AI development at scale. Our platform makes it easy to find global compute resources and train state-of-the-art models through distributed training across clusters. Collectively own the resulting open AI innovations, from language models to scientific breakthroughs.

At Rec (rec.us) , we’re reimagining how the world plays, trains, competes, explores and gets outside. Our mission is to empower the entire recreation community to thrive, and our vision is bold: power recreation worldwide. Booking a tennis court? Signing your kid up for swim lessons? Trying to find an open rec league? It shouldn’t feel like filing your taxes. We're partnering with parks & rec departments, golf courses, campgrounds, gyms and more to transform a $105B industry stuck in the Stone Age. We’re not just putting recreation online—we’re redesigning it from the ground up, for the mobile-first, AI-powered world we live in. And about AI? From simplifying registration flows to auto-scheduling entire recreation departments to empowering parks & rec staff to utilize the data to make their programming better, we use AI where it makes a real impact. We’re builders at heart, using the best tools to solve real problems for real communities. If you get fired up by making tech that actually matters—to families, coaches, and kids all over the country—come join us.

Pulley is the first dedicated platform for construction permitting. Our purpose-built workflows, localized requirements and embedded expertise help developers, contractors, and architects get permits faster, removing a costly bottleneck to construction. Across dozens of markets, leading builders trust Pulley to permit everything from single-family homes to complex commercial projects.

We have developed an end-to-end solution that helps investors by giving them relevant data analytics (CAP rate, CoC, ROI, etc.), daily deals where our AI/ML algorithm curates hundreds of listings and finds investors a property that matches their needs. We connect investors to an investor-friendly realtor to close the deal and we provide a vendor marketplace that gives investors access to hand-picked vendors that’ll help them prep their property.

At Provable, you’ll join an elite team building infrastructure, products, and services for the Aleo ecosystem and other ZK technologies. We’ve published landmark papers such as Zexe (eprint.iacr.org/2018/962) and Leo (eprint.iacr.org/2021/651). We hope to create a safer, decentralized world with advanced privacy technology.

Applied Behavior Analysis, Occupational Therapy, and Speech Therapy: ABA is the only surgeon general recommended treatment for autism. Taking a comprehensive approach, involving occupation and speech therapy is proven to achieve the highest level of outcomes for kiddos with ASD and other developmental delays. Our commitment to clinical quality is unwavering and is at the forefront of all decision-making.