Top Tech Companies in California (10,000+)

Moov is a payments infrastructure platform making it easy to accept, store, send, and spend money all from a single, elegantly-designed API. Instead of stitching together multiple vendors, software companies simply add Moov to their products to get the latest in payment technology, user onboarding, licensing, compliance, and more.

At Capital One, we think and work like a tech company, using our digital fluency to transform everything about the customer experience. We’re bending data to our will, and turning a stodgy industry on its head. That’s reflected in our ranking as the number one business technology innovator in the U.S. in the 2016 InformationWeek Elite 100.

Rokt is the global leader in ecommerce, unlocking real-time relevance in the moment that matters most - The Transaction Moment. Rokt’s AI Brain and Ecommerce Network powers billions of transactions connecting hundreds of millions of customers, and is trusted to do this by the world’s leading companies including Live Nation, Macy’s, Fanatics, AMC Theatres, PayPal, Uber, Hulu, Staples, Albertsons and...

Xero is small business accounting software that provides a platform on which businesses can build a fully integrated solution. It’s designed to make life better for people in small business, their advisors, and communities around the world. Xero minimises tedious admin by automating routine tasks, delivers valuable insights when needed, and brings together business data, trusted advisors, and powerful apps...

PagerDuty, Inc. (NYSE:PD) is a global leader in digital operations management, enabling customers to achieve operational efficiency at scale with the PagerDuty Operations Cloud. The PagerDuty Operations Cloud combines AIOps, Automation, Customer Service Operations and Incident Management with a powerful generative AI assistant to create a flexible, resilient and scalable platform to increase innovation velocity, grow revenue, reduce cost, and...

Philo is a streaming television service that's reimagining the TV experience for the modern viewer. Founded by a group of technology and product enthusiasts, we set out to build the future of television by combining the best of modern technology with the most compelling medium ever invented—delivering the TV experience we've always wanted for ourselves. At our core, Philo provides an...

Founded in 2020 by George Sivulka and backed by Peter Thiel and Andreessen Horowitz, Hebbia powers investment decisions for BlackRock, KKR, Carlyle, Centerview, and 40% of the world’s largest asset managers. Our flagship product, Matrix, delivers industry-leading accuracy, speed, and transparency in AI-driven analysis. It is trusted to help manage over $15 trillion in assets globally. We deliver the intelligence that...

MarketAxess is on a journey to digitally transform one of the world's largest financial markets, enabling the shift from analog, phone-based trading to a fully electronic marketplace. Why does this matter? Because our platform makes trading fixed-income more accessible, ultimately improving transparency, efficiency and competition in the marketplace. Changing the way an established industry transacts is no easy feat. There...

We are a world leader in innovative memory solutions that transform how the world uses information to enrich life for all. For over 45 years, our company has been instrumental to the world’s most significant technology advancements, delivering optimal memory and storage systems for a broad range of applications.

Wipfli is a leading national advisory and accounting firm with nearly 100 years of serving ambitious middle-market organizations. We understand our clients' unique challenges and help them succeed on their terms through assurance, tax, advisory, outsourcing and technology services. With 2,900+ associates and global alliances, we combine national capabilities with local relationships. "Wipfli" is the brand name under which Wipfli LLP...

Vast is developing next-generation space stations to ensure continuous human presence in space for America and its allies, enabling advanced microgravity research and manufacturing, and unlocking a new space economy for government, corporate, and private customers. Using an incremental, hardware-rich and low-cost approach, Vast is rapidly developing its multi-module Haven Station. Haven Demo’s 2025 success made Vast the only operational...

Riot’s (NASDAQ: RIOT) vision is to be the world’s most trusted platform for powering and building digital infrastructure. Riot’s mission is to empower the future of digital infrastructure by positively impacting the sectors, networks, and communities that we touch. We believe that the combination of an innovative spirit and strong community partnership allows us to achieve best-in-class execution and create successful...

Zscaler accelerates digital transformation so our customers can be more agile, efficient, resilient, and secure. Our cloud native Zero Trust Exchange platform protects thousands of customers from cyberattacks and data loss by securely connecting users, devices, and applications in any location.

Clear Street’s mission is to give every sophisticated investor access to every asset, in every market, through a unified platform built for speed, transparency and scale. We give our clients the technology, tools, and service once reserved for the largest institutions, rebuilt with modern infrastructure. Our single, cloud-native, end-to-end capital markets platform powers investor growth today and is transforming how they...

EliseAI builds vertical AI agents for housing and healthcare — sectors that together make up nearly 40% of household spending. These agents automate high-volume workflows like leasing, maintenance, renewals, and patient intake, helping organizations cut costs, improve efficiency, and deliver better experiences. How does it work? EliseAI integrates directly into operational workflows: Housing: Manages leasing, maintenance, renewals, billing, and resident communication. Healthcare: Handles intake,...

Together, we turn ambition into action. For more than three decades, Citadel has captured undiscovered market opportunities in markets around the world by empowering extraordinary people to pursue their best and boldest ideas. We strive to identify the highest and best uses of capital to generate superior long-term returns for the world’s preeminent public and private institutions.

Dynatrace lets customers understand their business like never before, so they can see beyond the complexity, find and fix problems faster and automate manual tasks with Al — so they can focus on what truly matters: running their business.

Deepgram is the leading voice AI platform for developers building speech-to-text (STT), text-to-speech (TTS) and full speech-to-speech (STS) offerings. 200,000+ developers build with Deepgram’s voice-native foundational models – accessed through APIs or as self-managed software – due to our unmatched accuracy, latency and pricing. Customers include software companies building voice products, co-sell partners working with large enterprises, and enterprises solving...

Headquartered in New York City, Take-Two Interactive Software, Inc. is a leading developer, publisher, and marketer of interactive entertainment for consumers around the globe. We develop and publish products principally through Rockstar Games, 2K, and Zynga. Our strategy is to create hit entertainment experiences, delivered on every platform relevant to our audience through a variety of sound business models. Our...

Super-charged customer acquisition. Centerfield delivers outcome-based digital marketing solutions and personalized omnichannel experiences for the world’s leading brands. Powered by our proprietary Dugout platform, Centerfield acquires customers at scale for leading residential service, insurance, e-commerce and B2B brands. Centerfield’s digital experiences and digital brands, such as Business.com and BroadbandNow.com, reach more than 150 million in-market shoppers annually. Centerfield is headquartered...