Top Tech Startups in California, US in 2024

We’re a market-leading customer messaging and engagement solution, offering mobile and web push notifications, in-app messaging, SMS, and email. Our powerful multi-channel platform enables over one million businesses to deliver over 10 billion messages daily. Powered by superior architecture, OneSignal is designed to scale and deliver messages more quickly and reliably than the competition. By providing an open API, extensive documentation, free accounts, and intuitive personalization and analytics tools, we help businesses of all sizes provide a seamless messaging experience to create meaningful customer connections.

Aircall is the phone system for modern business. An entirely cloud-based voice platform that integrates seamlessly with popular productivity and helpdesk tools that workplaces are already using, Aircall was built to make phone support as easy to manage as any other business workflow—accessible, transparent, and collaborative. Aircall believes that voice is the most powerful way to communicate with customers, prospects, candidates, and colleagues, and it is designed to take the headache out of what should be a delightful moment of human connection. Aircall was founded in 2014 and has raised over $100 million. Based in New York and Paris, the company has over 300 employees.

Today, there's more data and users outside the enterprise than inside, causing the network perimeter as we know it to dissolve. We realized a new perimeter was needed, one that is built in the cloud and follows and protects data wherever it goes, so we started Netskope to redefine Cloud, Network and Data Security. Since 2012, we have built the market-leading cloud security company and an award-winning culture powered by hundreds of employees spread across offices in Santa Clara, St. Louis, Bangalore, London, Melbourne, and Tokyo. Our core values are openness, honesty, and transparency, and we purposely developed our open desk layouts and large meeting spaces to support and promote partnerships, collaboration, and teamwork. From catered lunches and office celebrations to employee recognition events (pre and hopefully post-Covid) and social professional groups such as the Awesome Women of Netskope (AWON), we strive to keep work fun, supportive and interactive. Visit us at Netskope Careers. Follow us on LinkedIn and Twitter @Netskope for more updates.

We are disrupting the trillion-dollar construction industry with technology, making it possible for almost any profession to operate remotely. Our company is the only startup combining the strengths of technology and remote work to solve the challenges of residential construction. Unlike most other products and services, hiring a contractor for a home improvement project is very far from a 1-click experience today. Ergeon aims to empower skilled local contractors with human and technology-powered services to make home improvement easy. We take a full-stack approach to create a seamless experience for homeowners, and leverage technology to scale the front & back offices of contractors. With the belief that everyone has a right to professional growth and respect regardless of their location, we proudly have staff (aka Ergeoneers) in over 40 of countries, with a great score and recommendation rating on Glassdoor. Come join us to make construction friendly and accessible! Ergeon: [er - g- eon] Erg = unit of work or energy Eon = billion years Ergeon is founded by CS Ph.D. serial entrepreneurs Jiayue (Jenny) He and Odysseas Tstatalos. They picked this name to symbolize their joint passion for using tech to revolutionize work.

Atom Computing is developing a quantum computer based on optically-trapped neutral atoms. Our quantum computer is a hybrid quantum/classical system. The optical and electronic systems that manipulate and read out the quantum information are controlled by classical electronics and software systems.

Amplitude does mobile analytics to help app developers optimize their in-app purchasing, engagement, and retention. Mobile app usage is growing at a rapid pace but the options for analytics aren’t adequate to meet mobile developer needs. Amplitude works out of the box with minimal setup while having all the advanced features that used to be reserved for enterprise products. With Amplitude, developers can look at their funnels, retention, and revenues, as well as powerfully segment everything. All data is updated in real-time the second it comes in. Amplitude scales up to hundreds of millions of events while also allowing you to drill down to the level of the individual user. Amplitude supports integration at any level, including access to the raw data for custom querying written in SQL. We're 100% focused on building the analytics we always wanted for mobile apps.

Tanium, the industry’s only provider of converged endpoint management (XEM), leads the paradigm shift in legacy approaches to managing complex security and technology environments. Only Tanium protects every team, endpoint, and workflow from cyber threats by integrating IT, Operations, Security, and Risk into a single platform that delivers comprehensive visibility across devices, a unified set of controls, and a common taxonomy for a single shared purpose: to protect critical information and infrastructure at scale. Tanium has been named to the Forbes Cloud 100 list for six consecutive years and ranks on Fortune’s list of the Best Large Workplaces in Technology. In fact, more than half of the Fortune 100 and the U.S. armed forces trust Tanium to protect people; defend data; secure systems; and see and control every endpoint, team, and workflow everywhere. That’s the power of certainty. Visit tanium.com and follow us on LinkedIn and Twitter.

Dataiku is the platform for Everyday AI, systemizing the use of data for exceptional business results. Organizations that use Dataiku elevate their people (whether technical and working in code or on the business side and low- or no-code) to extraordinary, arming them with the ability to make better day-to-day decisions with data. More than 500 companies worldwide use Dataiku to systemize their use of data, analytics, and AI, driving diverse use cases from fraud detection to customer churn prevention, predictive maintenance to supply chain optimization, and everything in between. Don’t get us wrong: we are a tech company building software. Our culture is even pretty geeky! But our driving force is and will always remain people, starting with ours. We consider our employees to be our most precious asset, and we are committed to ensuring that each of them gets the most rewarding, enjoyable, and memorable work experience with us. Headquartered in New York City, Dataiku was founded in Paris in 2013 and achieved unicorn status in 2019. Now, more than 800 employees work across the globe in our offices and remotely. Backed by a renowned set of investors and partners including CapitalG, Tiger Global, and Serena, we’ve set out to build the future of AI. Let’s do it together!

Apeel uses materials that exist in the peels, seeds, and pulp of all fruits and vegetables to create a protective extra peel that seals moisture in and keeps oxygen out. That means our produce stays fresh, nutritious, and delicious twice as long. It also means less produce goes to waste throughout the supply chain—from grower to retailer to consumers at home. Less waste for you means less waste for the planet and a more abundant future for us all.

At Weights & Biases our mission is to build the best tools for machine learning. Our co-founders built Figure Eight, and our tools are being used by cutting-edge machine learning teams including OpenAI, NVIDIA, and Co:here. We’re looking for passionate, driven people who love to learn and collaborate in an inclusive work environment.