Top Tech Startups in California, US in 2026

Augment’s mission is to build AI teammates that empower people to do their best work. We believe AI should amplify, not replace, human intelligence—removing friction, surfacing what matters, and helping teams stay focused on what counts. Our mission is embedded in how we build, scale, and support both our product and our people. When we eliminate busywork and enhance clarity, we unlock more time, more creativity, and more impact. That’s the future of work—and we’re building it today. Augment is the AI teammate platform that helps teams do their best work—faster, smarter, and with greater focus. By integrating directly into existing tools and workflows, Augment automates repetitive tasks, accelerates decision-making, and frees up time for strategic work. Today, teams across industries like logistics, customer operations, and sales use Augment to scale impact and unlock human potential. We’re a venture-backed startup driven by a culture of ownership, velocity, and curiosity. Our team is composed of builders, operators, and technologists who care deeply about solving real-world problems with practical AI. We’re growing fast—and always looking for thoughtful, mission-aligned people to join us.

FleetWorks automates the 2B phone calls and emails that the freight industry makes every year. We use voice synthesis, generative AI, and integrations with logistics systems to solve the largest cost in this industry - people. We are a fast-growing startup in the logistics space led by a founding team from companies like Airbnb and Uber Freight. We are a YC backed company. For more information about us, visit ycombinator.com/companies/fleetworks

Karlon Group provides enterprise-grade fractional finance & accounting, data analytics and investor relations support services to bootstrapped, venture-backed, and private equity owned companies at various stages of growth. We bring decades of strategic and operational finance & accounting experience, partnering with businesses across a range of industries, from SaaS to consumer to financial services. Our fractional CFO franchise prioritizes close partnership, excellence, and integrity above all in our approach to advising clients on their most critical finance & accounting challenges.

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.

Vision: At Living Stones Foundation, we envision a world where every individual and community thrives with hope, dignity, and opportunity. Our vision is rooted in the belief that through sustainable initiatives, collaborative efforts, and a commitment to positive change, we can create a global landscape where socio-economic disparities diminish, and the inherent potential of every person is realized. Mission: Our mission at Living Stones Foundation is to empower communities, inspire change, and foster innovation. We strive to be a catalyst for positive transformation by actively engaging in sustainable projects, strategic partnerships, and leveraging our diverse expertise. Through a holistic approach that transcends conventional boundaries, we aim to uplift and empower individuals, organizations, and churches, making a lasting impact on the fabric of society.

Our product is a platform where AI/ML and analytics are powered by decentralized, responsible, and equitable data ownership. Our mission is to simplify and guide the developer experience of creating, sharing, discovering, and using data forever, to be connected, fast, and fair.

Today's healthcare plans & payers struggle with fragmented tools and inconsistent quality across their Behavioral & Mental Health services. Our end-to-end solution transforms network management by automating documentation review, monitoring quality metrics, and providing AI-powered decision support - all in one integrated platform. This comprehensive approach ensures consistent quality delivery across mental & behavioral health services while reducing administrative overhead.

At Topflight we’ve helped our venture-funded startups and enterprise clients strategize, design, develop, launch and maintain products which have created $200 million in additional net worth and 3 acquisitions by Fortune 1000 companies across verticals such as healthcare, fintech, lifestyle and more. We are a product design company. We are a team of UI/UX designers, product designers, full-stack developers, and ex-founders of companies, each rigorously hand-picked for the qualities that contribute most to product success. Together, we build web and mobile apps that solve our clients’ problems in the most multidisciplinary and innovative ways possible. We expect everyone on our team that touches your project to bring elite craftmanship and become a trusted partner that helps you make product decisions that lead to business growth.

The current immigration system is a gatekeeping bureaucracy optimized for inertia, not efficiency. We will productize immigration, turning high-stakes legal navigation into an end-to-end service that is 10x better than law firms.