Top React Companies (3,250)

Optum, part of the UnitedHealth Group family of businesses, is a global organization that delivers care, aided by technology to help millions of people live healthier lives. The work you do with our team will directly improve health outcomes by connecting people with the care, pharmacy benefits, data and resources they need to feel their best. Here, you will find...

NetBox is the most popular open-source Network Source of Truth. Grown and battle-hardened over the last 6 years by a huge and rapidly growing open-source community, NetBox is feature rich and enjoys a wide ecosystem of integrations into popular tooling. NetBox Cloud, by NetBox Labs, is a fully supported, hosted solution with specific performance and service SLAs and commercial support. NetBox...

Cat Digital is the digital and technology arm of Caterpillar Inc., responsible for bringing digital capabilities to our world-famous yellow iron. With over 1.5M connected assets worldwide, our teams use data, technology, advanced analytics and AI capabilities to help our customers build a better world.

Snap! Mobile has been proudly supporting athletics and activities programs around the country with simple and dependable services since 2014. Snap! Raise has raised more than One Billion dollars for over 150,000 groups and teams through over 12.5 million participants and donors. In addition to the Snap! Raise fundraising solution, Snap! Mobile further supports schools, groups, and teams with its...

tms unites technology and marketing and sourcing to drive transformational change for the world’s leading brands. With 1200+ employees across 26 countries, we offer an impressive range of solutions — from inspiration and innovation to category management and delivery. ​ Headquartered in Chicago with 10 offices worldwide, we are responsible for some of the world’s most successful and iconic long-term marketing...

Ursa Major was founded to address a critical shortfall in the U.S. industrial base and bring a new model to aerospace and defense systems: we design and manufacture the world’s leading propulsion systems for space, hypersonic applications, and missile systems. Our products and technologies require an extraordinary team – a team that will mold tomorrow’s technologies while deploying today’s best....

Kalshi is the largest legal prediction market in the U.S., enabling traders to buy and sell contracts on the outcome of real-world events- from interest rate decisions and inflation numbers to whether a bill passes Congress or a major company CEO steps down. Approved by the CFTC, Kalshi created a new asset class called event contracts, which allow market participants...

Gradient AI is revolutionizing Group Health and P&C insurance with AI-powered solutions that help insurers predict risk more accurately, improve profitability, and automate underwriting and claims. Our SaaS platform taps into one of the industry’s largest data lakes—tens of millions of policies and claims—to deliver deep, actionable insights. Trusted by leading carriers, MGAs, TPAs, and self-insured employers, Gradient AI has...

Vetcove is a Y Combinator and venture-backed growth stage company with notable investors in Silicon Valley and NYC. Our mission is to provide veterinary hospitals and nonprofits with technology that helps them succeed through our eCommerce and mobile platforms. Our community includes more than 17,000 veterinary hospitals and nonprofits whose staff collectively deliver care to tens of millions of animals...

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 see technology not as a layer on top of care, but as the connective tissue that helps it grow. Grow Therapy is an online therapy platform that helps you find a therapist who gets you—and takes your insurance. Grow was founded to create end-to-end systems that make therapy easier on both sides: helping therapists launch and grow thriving private practices...

Grainger is a leading broad line distributor with operations primarily in North America and Japan. We Keep The World Working® by serving more than 4.6 million customers worldwide with products delivered through innovative technology and deep customer relationships. We’re dedicated to providing value for customers, fostering an engaging culture for team members and driving strong financial results. Our welcoming workplace...

Pie is transforming small business insurance. Our team of seasoned technology and insurance experts are on a mission to empower small businesses to thrive by making insurance affordable and as easy as pie.

As the world’s largest asset manager, BlackRock partners with investors around the globe to help them (and those on whose behalf they invest) plan for life’s most important goals – like retirement, home ownership and their children’s education. Our clients range from governments, foundations and other large institutions to those investing on behalf of individuals, including firefighters, nurses, teachers and...

We help everyday Americans build a brighter financial future. With a business model that is aligned with our customers, we create transparent, fair, and simple financial products that put money back in the hands of our members, help them spend wisely, and avoid unfair fees. We don’t just reduce stress — we promote sustainable financial health. Our team comes from diverse...

Here at Strata, we provide financial planning software, data, and insights to drive decisions and performance for organizations spanning the healthcare, higher education, and financial services industries.

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,...

At any given time, 16 million Americans are experiencing a crisis that requires urgent help from our legal system or government. The right assistance could transform their lives. But today, most never get it. Atticus makes it easy for any sick or injured person in crisis to get the life-changing aid they deserve. In just three years, we’ve become the leading...

GRAIL is a healthcare company whose mission is to detect cancer early, when it can be cured. GRAIL is using the power of high-intensity sequencing, population-scale clinical studies, and state-of-the-art computer science and data science to enhance the scientific understanding of cancer biology, and to develop and commercialize pioneering products.

Welcome to Comcast. From the connectivity and platforms we provide to the content and experiences we create, we bring people together, globally. Our people think the world of our work, and that’s why our work is the best in the world.