Top Tech Companies in Chicago, Illinois (6,461)

CSC is a global leader in providing business, legal, tax, and digital brand services to companies around the world. With more than 8,000 employees, CSC operates in more than 140 jurisdictions, delivering solutions that help businesses thrive. We pride ourselves on our client-focused approach, market-leading expertise, and unmatched global reach.

IG North America is home to tastytrade, tastylive, tastyfx, and tastycrypto—a family of brands built to democratize trading and empower individual investors. Founded in Chicago by the creators of thinkorswim, acquired by London-based IG Group in 2021, we combine startup innovation with the backing of a global fintech leader with 50+ years of experience. From our headquarters in Chicago's Fulton...

Allwyn North America is a full-service lottery operator, supplier, and business partner to North American lotteries. We make play better for all with innovative lottery technology and services, engaging content, and tried-and-tested playbooks that responsibly grow lotteries’ player base, revenue, and returns to good causes over time. As operating partner to the Illinois Lottery, Allwyn North America works to responsibly...

Alliant is unlike any other financial institution — a digital credit union that wows our members. We’re boldly disrupting banking norms to do good for our members, employees and communities. With 90 years of history and more than $19 billion in assets, Alliant Credit Union is the largest credit union in Illinois and one of the largest in the U.S. Our industry-leading...

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.

Since our founding in 2004, Simplex has continued to remain at the forefront of the industry by focusing on innovation, automation, and data-driven analysis. Simplex is a leading technology-driven market-making firm that builds proprietary software to create and capitalize on financial opportunities. We combine talented and dedicated technologists with data-driven employees to solve constantly evolving puzzles in the marketplace. Specializing in...

Since we opened our doors in 2009, the world of commerce has evolved immensely, and so has Square. After enabling anyone to take payments and never miss a sale, we saw sellers stymied by disparate, outmoded products and tools that wouldn’t work together. So we expanded into software and started building integrated, omnichannel solutions – to help sellers sell online, manage...

Our e-commerce website has everything businesses and consumers need to make their business go, at prices that make sense. We have over 14 million products on our website (and counting) to help your business run that are shipped fast and often free. Throw in our award-winning workplace culture and you’ll find Zoro an amazing place to work and grow!

Coupa is a global technology company that helps businesses run smarter by connecting all the ways they spend money — from procurement and expenses to payments and supply chain decisions — in one intelligent platform. In simple terms, Coupa gives organizations the visibility and control they need to make better financial choices, reduce waste, and drive real impact. It’s where...

ABN AMRO Clearing USA LLC (AAC-USA) is a subsidiary of ABN AMRO Clearing Bank N.V. We are a global clearing firm that provides an integrated suite of financial services to professional trading participants in the global financial market. The core service offering consists of clearing, execution, stock borrowing and lending, settlement. AAC-USA has a Global Reach through direct and indirect clearing...

PartySlate is a fast-paced Chicago startup disrupting the $156 billion events industry in the United States. There are 13 million parties per year, produced by over 460,000 venues and vendors. PartySlate connects people planning all types of events — from weddings and corporate events to galas and milestone birthdays — with the venues and vendors who can bring their ideas...

Transforming the insurance industry is ambitious, we know. That’s why at Applied, we’re building a team that shows up every day ready to learn, willing to try new things, and driven to deliver innovative software and services that make us indispensable to our customers – all within a culture built on values that make us indispensable to each other, too....

We bring together one of the world’s largest libraries of multimodal clinical and molecular data with a robust suite of AI tools to help physicians personalize care in real time, connect patients with therapies and clinical trials, and enable partners to accelerate discovery and development of new treatments. With ~8 million de-identified research records and 350+ petabytes of data, Tempus partners...

At AdAction, we’re revolutionizing how brands connect with audiences through the power of mobile technology. As leaders in performance-driven marketing, we create innovative solutions that merge supply, loyalty, and rewards into seamless, mobile-first strategies. Our platform empowers brands and app developers to drive engagement, boost retention, and achieve sustainable growth by delivering personalized, reward-based experiences that foster genuine connections. With cutting-edge...

Prolaio is a clinical intelligence company dedicated to unlocking continuous, predictive and shareable heart data to liberate patients from hospital-based reactive care and accelerate every new therapy. The company was created by cardiologists, cardiovascular practitioners, and data scientists specifically to address the world’s number one cause of death — cardiovascular disease. By combining scientific rigor with cutting‑edge technology, Prolaio aims...

We contribute to human progress by empowering people to express themselves, live in the moment, learn about the world, and have fun together.

We solve for advertising campaign and creative complexities - both key elements to the time/money savings and performance that brands, agencies and businesses seek. Our unified platform combines media, creative, and intelligence, offering end-to-end workflows powered by AI across the open and closed web. With over 700 brands and advertisers, we've proven that dynamic and personalized creative makes advertising impactful. We...

IMC is a global trading firm powered by a cutting-edge research environment and a world-class technology backbone. Since 1989, we’ve been a stabilizing force in financial markets, providing essential liquidity upon which market participants depend. Across our offices in the US, Europe, Asia Pacific, and India, our talented quant researchers, engineers, traders, and business operations professionals are united by our...

At Vibes, our premier mobile messaging platform helps world-class brands intelligently automate and optimize their mobile marketing outcomes through the power of SMS, MMS, RCS and Mobile Wallet. Industry leaders like Chipotle, Kohl’s, Polo Ralph Lauren, The Children's Place, KFC, Ulta Beauty, and others use Vibes to grow their customer relationships with relevant, high-volume mobile messaging and mobile wallet marketing on...

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.