Top Tech Startups in California, US in 2026

Homebase is the everything app for hourly teams, with employee scheduling, time clocks, payroll, team communication, and HR. More than 150,000 small (but mighty) businesses, and 2M+ hourly workers rely on Homebase to make work radically easy and superpower their teams. Our mission is to make small business teams unstoppable.

Blockstream is the leading Bitcoin company, providing cutting-edge infrastructure solutions for enterprises, institutions, and individual Bitcoin users. We develop industry-leading Bitcoin self-custody solutions, Bitcoin-based financial products, second-layer scaling technologies, and enterprise-grade blockchain infrastructure. OUR PRODUCTS: - The Liquid Network: sidechain-based settlement network for traders and exchanges - Blockstream App: A multi-platform, feature-rich Bitcoin and Liquid Wallet - Blockstream Jade: A fully-open source hardware wallet for Bitcoin and Liquid - Blockstream Enterprise: Enterprise-grade custody and treasury management tool - Blockstream Satellite: the Bitcoin blockchain beamed from space - Many major contributions to Bitcoin open source software and research

Luminary's technology platform enables wealth advisors to deliver generational gift and philanthropic giving solutions at scale. More than $100 billion in family and philanthropic giving capacity is created each year. But flaws in the current process impose over a billion in annual costs in order to access it. We are building the first product for wealth managers to automate the complex, and inefficient estate planning process.

Better data leads to more performant models. Performant models lead to faster deployment. We help deliver value from AI investments faster with better data by providing an end-to-end solution to manage the entire ML lifecycle.

Our team works on state-of-the-art artificial intelligence, machine learning, computer vision and sensors to make industrial robots intelligent. We are intelligence enablers, enabling hardware to do more with less human input. Our first system we have developed is a transformative robotic welder. It is a system that sees, understands, and requires almost zero human input to do its job. Join our talented team and help us create the future of manufacturing.

Pair Team is on a mission to build the primary care infrastructure for America’s most vulnerable communities. They are the first tech-enabled care team that empowers safety-net primary care systems and the Medicaid & Medicare patients they serve. They act as an extension of the clinical staff to provide a personalized, high-touch care experience while addressing patients' barriers to care such as lack of transportation, housing/food insecurity, and mobile phone access. Internally, they are building a unique care delivery platform to ensure clinical best practices, integrate care with community-based organizations, and automate administrative work so that clinicians can focus on time with our patients.

Our mission is to reinvent the way people learn, starting with language. Learning a language can change a life by opening doors to new cultures, careers, and communities. Two billion people around the world are actively trying to learn a language, but the best way to learn (one-on-one tutoring) is hard to access at scale and hasn’t been meaningfully improved in decades. Speak is building a human-level, AI-powered tutor in your pocket: a conversation-first experience that lets learners actually speak, get instant feedback, and progress through carefully designed lessons. The result is a complete path from beginner to confident speaker across multiple languages. Speak first launched in South Korea in 2019, where Speak has now become the number one language learning app, and we now serve learners across many markets and 15+ languages. Speak is one of the world’s leading AI companies, with over $150m raised in venture investment from OpenAI, Accel, Founders Fund, Khosla Ventures, and more, with a distributed team across San Francisco, Seoul, Tokyo, Taipei, and Ljubljana.

Q Bio is revolutionizing primary care with the first clinical digital twin platform, powered by breakthrough whole-body scanning technology, that highlights the most important changes in a person’s physiology for sharing with physicians and specialists anywhere in the world. The company was founded in 2015 and is headquartered in San Carlos, California. Q Bio was founded by Jeffrey Kaditz, serial entrepreneur and Founder of Affirm, Dr Michael Snyder, Chair of Genetics and Director of Personalized Medicine and Stanford University, and Dr Garry Choy, physician, radiologist, and former Chief Medical Information Officer at Mass General Hospital. We are fortunate to be backed by some of the best venture groups in the world including: A16Z, Khosla Ventures, Founders Fund, SciFi VC, and Kevin Durant.

Map and manage global flows (cargo, data, money, etc.) using machine learning -- while preserving data privacy, data sovereignty, and data security.

At Housecall Pro, we're focused on making the everyday lives of home services professionals better by helping them to incorporate mobile software into their workflow. The home services industry remains vast ($700b+) but untouched by technology and unencumbered by a dominant competitor. The 3M+ mobile businesses in home services are facing dramatic change as the world shifts from offline to online. Along this journey, we are quickly becoming the backbone operating system for service labor across the US and Canada. We’ve rocketed from MVP to the #1 ranked SaaS software platform in just over 2 years.