Top Tech Startups in California, US in 2026

At Willow Innovations, Inc., our vision is to create a better world for moms. We are focused on identifying where moms need support in the motherhood journey, and building hardware- and software-based solutions around their needs. In 2014, we created the first-ever cord-free Willow™ Wearable Breast Pump, revolutionizing the industry. Fast forward to today, we are building a portfolio of physical and digital products to solve mom's most meaningful problems and improve their lives. Willow Innovations, Inc. sits at the unique and exciting intersection of HealthTech, FemTech, Consumer Goods, and Med device. Our potential for scale and impact is extraordinary—we’re just getting started. We’re looking for talented, passionate team players to help us deliver our mission and vision. If this sounds like you, we'd love to hear from you! Recent awards we’ve won include: - Great Place to Work Certified 2021–2022 - Omnis Awards, Outstanding Culture and Communication

Contra is a professional community for your independent journey. Digital professionals use Contra to create stunning visual profiles, earn money commission-free, and build high-quality professional communities and referral networks. Contra was started by a group of independents who were tired of existing professional networks that are blind to the needs of digital professionals. We’re creating a new way to work for the independent digital workforce.

Astra is a next-generation financial services company focused on providing advanced payment technology for financial institutions, fintech startups, and enterprises. The company’s full-stack payments platform enables its customers to offer real-time, programmatic transfers between their users’ accounts.

Karbon is the global leader in AI-powered practice management software for accounting firms. We provide an award-winning cloud platform that helps tens of thousands of accounting professionals work more efficiently and collaboratively every day. With customers in 40 countries, we have grown into a globally distributed team across the US, Australia, New Zealand, Canada, the United Kingdom, and the Philippines. We are well-funded, ranked #1 on G2, growing rapidly, and have a people-first culture that is recognized with Great Place To Work® certification and on Fortune magazine's Best Small Workplaces™ List.

Volley builds the best voice-controlled games and entertainment experiences for Amazon Alexa, Google Assistant, smartphones, and Fire TVs. Popular Volley voice games include Song Quiz, Jeopardy!, and The Price Is Right. Our voice apps are used by millions of people every month. We believe voice control will become the main way people access entertainment in their bedrooms, kitchens, living rooms, and cars, and our goal is to become the "Netflix of Voice" for this emerging category of devices. Volley was founded by Max Child and James Wilsterman in 2016. We're a 60+ person hybrid remote/in-person company, headquartered in the Hayes Valley neighborhood of San Francisco. While we work to make home entertainment more accessible and engaging, we like to have fun along the way, with team lunches, Friday happy hours, and very active #food and #pets slack channels. If any of this sounds fun to you (we promise it is), come join us! Read more about Volley's culture and mission here: volleythat.com/post/volley-mission-culture-and-what-we-create

Unity is the world’s leading platform for creating and operating real-time 3D (RT3D) content. Creators, ranging from game developers to artists, architects, automotive designers, filmmakers, and others, use Unity to make their imaginations come to life. Unity’s platform provides a comprehensive set of software solutions to create, run and monetize interactive, real-time 2D and 3D content for mobile phones, tablets, PCs, consoles, and augmented and virtual reality devices. The company’s 1,400+ person research and development team keeps Unity at the forefront of development by working alongside partners to ensure optimized support for the latest releases and platforms. Apps developed by Unity creators were downloaded more than three billion times per month in 2019 on more than two billion unique devices. For more information, please visit unity.com. Download Unity: unity3d.com/get-unity We're hiring! Visit our careers site: careers.unity.com For support, please email: [email protected] Check us out on our other social channels: Twitter: twitter.com/unity3d Facebook: facebook.com/unity3d LinkedIn: linkedin.com/company/unity-technologies Instagram: instagram.com/unitytechnologies

About Zenskar Zenskar is an AI-native revenue automation platform built to handle real-world complexity. It sits between your CRM and ERP and automate everything in between: billing, revenue recognition, collections, usage metering, and analytics. Across any pricing model, any entity structure, any currency. Our vision: Zero-Touch: Finance. Agents execute. Humans supervise. Finance teams set the rules. Zenskar runs them. Founded by [Apurv Bansal](linkedin.com/in/bansalapurv) and [Saurabh Agarwal](linkedin.com/in/saurabh--agrawal), second-time founders whose previous startups were acquired by Snapdeal and Gaana. The team brings experience from Google, Deutsche Bank, Elevation Capital, Harvard Business School and IITs. We have 5x'd revenue in the past year.

We launched Riot Games in 2006 to develop, publish, and support games made by players, for players. In 2009, we released our debut title, League of Legends. League has gone on to be the most-played PC game in the world and a key driver of the explosive growth of esports. Players are the foundation of our community and it’s for them that we continue to evolve the League experience both in and out of game. Founded by Brandon Beck and Marc Merrill, and currently under the leadership of CEO Nicolo Laurent, we're headquartered in Los Angeles, California, and have 2,500+ Rioters in 20+ offices worldwide.

We are improving the TV viewing experience, enabling content discovery, and addressing audience fragmentation across screens to strengthen television’s business model and relevance to consumers. Our data and measurement products are transforming the way today’s largest brands across the media landscape are thinking about their business. Given the dramatic growth in streaming services, connected devices, time-shifting, and multi-screen viewership, our data solves real problems and creates meaningful competitive advantage for our clients.

Highnote is the world’s most modern card platform, purpose-built to grow customer loyalty, engagement, and revenue through embedded card issuance experiences. With an all-in-one platform and a fully integrated issuer processor built from scratch to address the use cases of today and tomorrow, Highnote gives enterprises unparalleled control, flexibility, and speed to realize their customer vision through innovative embedded finance experiences. Utilizing the developer-friendly Highnote platform, product and engineering teams at digital enterprises of all sizes can easily and efficiently embed virtual and physical payment cards (commercial and consumer prepaid, debit, credit, and charge), ledger, and wallet capabilities into their existing products, creating compelling value for users while growing revenue and building a unique and differentiated brand.