Top Tech Startups in California, US in 2026

Atomus is building cybersecurity for the world’s most critical companies. Instead of these companies building their own cybersecurity they onboard to our cybersecurity infrastructure. Examples of our commercial customers include hypersonic aircraft companies, satellite and space mission systems companies, AI and software companies, among many others. We are on a mission to bring industry leading cybersecurity to every business starting with the Aerospace and Defense industry. You get to work for some of the most exciting teams building some amazing technology for the DoD, and be on the frontlines for them.

Our product is webhook-as-a-service and our customers are developers. We want to make it as easy as possible for developers to integrate webhooks into their services, and to scale and maintain reliability for our customers as they grow.

GITAI is developing robots to work in range of space environments to free humans from performing dangerous tasks and reduce operational costs in space by up to 100 times. GITAI aims to provide highly capable, safe, and reliable robots to help build and maintain satellites, lunar colonies and even cities on Mars. GITAI is bringing together the best talents in the world to make this dream a reality. GITAI is a relatively small but rapidly growing company. Over half of our full-time employees have PhDs in engineering and science and three are former research associates from the University of Tokyo. GITAI has many exciting projects at various levels of development and testing, from early concepts to laboratory prototypes to our technical demonstration robot currently deployed in a commercial module of the International Space Station. GITAI is actively seeking highly motivated engineers and business development professionals to support these many endeavors. If you think you have what it takes, come join us to send robots to the final frontier.

Uncountable has built an enterprise software platform for R&D organizations to minimize the number of experiments required to reach a higher level of performance. By using the platform, scientists have instant access and search-ability to all of their previous formulations, instead of digging through disparate spreadsheets. And with previous experimental records properly structured and stored, Uncountable's artificial intelligence engine can be manipulated to provide the best formulation suggestions in order to achieve new product goals.

SafetyWing is here to make equal opportunities a global reality. We’re doing this by building a global social safety net, and all our products exist to fulfill this purpose. Think health insurance, income protection and retirement plans that are available to you wherever you’re from, and is with you wherever you go.

Metabase is bringing data tools with the elegance and simplicity of consumer products to the crufty world of enterprise business intelligence. Our Open Source analytics and business intelligence application let installs in minutes, and can connect to most commonly used databases. It lets anyone in your company quickly ask questions, and create dashboards or nightly emails without knowing SQL. We provide an opinionated open source starting point for how companies should measure, analyze and share their data as well as a suite of tools to deal with the complexity that arises as they grow.

At every company, there's someone who's most painful job is wrangling CSV files in Excel. OneSchema (oneschema.co) makes cleanup of messy CSVs 10x faster (demo). Our product is smart spreadsheet that makes data cleansing as simple as a few clicks. Our vision is to automate the “long tail of ETL” processes that today are painstaking, manual, and repetitive. We get our customers out of spreadsheets and back to the meaningful, creative work they love.

Bold's digital platform uses personalized exercise programs to address some of the most fundamental health and wellbeing challenges faced by older adults. Bold leverages research and data science to prevent falls, manage chronic conditions, and increase activity levels for older adults with clinically-effective and engaging exercise programs. Bold partners with health plans and providers to improve member outcomes and reduce care costs.

Securing the software development process, with a focus on improving developer velocity.

We are a passionate team crazy about autonomous vehicles. We are building an edge cloud for the autonomous driving that empowers businesses and individuals to store, share, and distribute their data assets. We are backed by the prestigious Berkeley Blockchain Xcelerator and looking for self-motivated, enthusiastic people who are passionate about autonomous vehicles, proud of their work, and desire to help create a world with less accidents and better driving experience using world-class edge computing and decentralized ledger technologies. You will have the opportunities to work with world class PhDs, engineers, professors, and industry gurus to change the future of transportation.