As of October 2026, there are 583 SaaS companies based in Illinois. They have combined revenues of $14.5B and employ 91.7K employees. They've raised $6.1B in capital and serve 40.6M customers combined.
Sorting: Highest -> Lowest
Showing 10 of 36 companies ranked by annual revenue.
Chicago, Illinois, United States
A global real estate advisory firm offering a comprehensive suite of services, including portfolio management, brokerage advisory and project management
Chicago, Illinois, United States
Direct response advertising and retention marketing agency providing sophisticated solutions to clients ranging from startups to Fortune 500 brands
Schaumburg, Illinois, United States
paylocity is the hr & payroll provider that frees you from the tasks of today, so together, we can spend more time focused on the promise of tomorrow.
Hoffman Estates, Illinois, United States
Vistex solutions helps businesses take control of their mission-critical processes, including their promotions, rebates, pricing, discounts, and other incentives. With so many programs across so many partner relationships, it can be impossible to see where all the money is going, let alone how much difference it’s actually making to revenue. With Vistex, business leaders can see the numbers, see what really works, and see what to do next – so they can make sure every dollar they spend really is driving more growth, not just more costs.
Chicago, Illinois, United States
provider of marketing automation and customer experience automation (CXA) software
Chicago, Illinois, United States
IRI is a leading provider of big data, predictive analytics and forward-looking insights that help CPG, OTC healthcare, retailers and media companies to grow their businesses. With the largest repository of purchase, media, social, causal and loyalty data, all integrated on an on-demand cloud-based technology platform, IRI guides its clients around the world in their quests to remain relentlessly relevant, capture market share, connect with consumers and deliver market-leading growth.
Northbrook, Illinois, United States
Pinstripes is a best-in-class experiential dining and entertainment brand, combining bistro, bowling, bocce and private event space. It provides Italian-American cuisine and offers a venue for socializing and events.
Chicago, Illinois, United States
Relativity is a technology company that provides e-discovery software solutions for managing electronic data during legal proceedings.
Chicago, Illinois, United States
Keeper Security is a Chicago-based cybersecurity company founded in 2011 by Darren Guccione and Craig Lurie. The company develops Keeper, a password manager and secure digital vault, along with KeeperChat, an encrypted messaging application, and additional security products including secure digital file storage and BreachWatch, a dark web monitoring service. As of late 2018, Keeper Security reported more than 15 million users across more than 100 countries, with thousands of new users added to the platform each day. The company serves both individual consumers and businesses, with 85 percent of its business-to-business revenue coming from organizations it classifies as small and medium-sized businesses, defined as companies with fewer than 1,000 employees. Keeper Security has been entirely bootstrapped since inception, with Guccione seed-funding the company and the founders reinvesting profits into growth. The company reported being profitable as of 2018, with a 90 percent or better annual subscription retention rate and a team that grew from roughly 35 people in 2016 to approximately 140 by late 2018.
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