# Top 27 online-only businesses in Illinois
Tamtam tracks 27 online-only businesses headquartered in Illinois. This list ranks all of them by number of employees on LinkedIn, led by Groupon, Wyzant and Restaurant.com. Their median headcount is 520. Half of them were founded in 2007 or later. The most common headquarters are Chicago (17) and Northbrook (2).
These online-only businesses in Illinois are primarily headquartered in Chicago, representing a mix of established companies and those founded in the 2000s and 2010s. The sector focus is broad, encompassing technology, retail, education, and financial services. Many leverage digital platforms to deliver their core offerings.
Key companies include Groupon, an experiences marketplace; Wyzant, which connects individuals with tutors; Restaurant.com, a platform for local dining deals; and Kaplan University, offering online higher education. Other notable firms are Factor_, providing chef-prepared meals, and FanSided, a network of fandom-focused sports and entertainment sites.
๐บ๐ธ Illinois ยท 27 companies ยท Updated Nov 11, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Groupon](https://www.tamtam.ai/c/groupon) (job-boards.eu.greenhouse.io)
An experiences marketplace offering local deals, live events, and travel options, helping people discover new experiences while assisting businesses in growing | Software Development | ๐บ๐ธ Chicago | 10,452 | 2008 |
| 2 | [Wyzant](https://www.tamtam.ai/c/wyzant) (wyzant.com)
Connecting individuals with over 80,000 tutors in 300+ subjects for tailored 1-to-1 lessons to help achieve academic and career goals | Technology, Information and Internet | ๐บ๐ธ Chicago | 3,698 | |
| 3 | [Restaurant.com](https://www.tamtam.ai/c/restaurant-com) (restaurant.com)
A trusted source connecting diners with local restaurants, offering savings, digital marketing services, and cost-effective gift certificate solutions to drive revenue | Restaurants | ๐บ๐ธ Arlington Heights | 3,328 | 1999 |
| 4 | [Kaplan University](https://www.tamtam.ai/c/kaplan-university) (purdueglobal.edu)
A regionally accredited university providing flexible higher education options for adult students, offering online programs and master's degrees Acquired by Purdue University | Higher Education | ๐บ๐ธ Chicago | 2,770 | |
| 5 | [Factor_](https://www.tamtam.ai/c/factor) (factor75.com)
This company offers no-nonsense, chef-prepared meals made with ingredients of integrity, expert-approved nutrition, and restaurant-quality cuisine for people on the go | Food and Beverage Services | ๐บ๐ธ Batavia | 1,140 | 2013 |
| 6 | [FanSided](https://www.tamtam.ai/c/fansided) (fansided.com)
FanSided is a rapidly growing network of fandom-focused sports, entertainment, and lifestyle sites with over 300 communities connecting passionate fans | Spectator Sports | ๐บ๐ธ Chicago | 928 | 2007 |
| 7 | [Zoro.com](https://www.tamtam.ai/c/zoro-com) (zoro.com)
An e-Commerce company obsessed with customer satisfaction, offering millions of products for businesses to easily shop for supplies and tools online | Retail Office Equipment | ๐บ๐ธ Chicago | 807 | 2011 |
| 8 | [NOCD](https://www.tamtam.ai/c/nocd) (treatmyocd.com)
Telehealth provider specializing in OCD treatment through live video therapy sessions with licensed therapists, self-help tools, and peer communities for support | Mental Health Care | ๐บ๐ธ Chicago | 796 | 2018 |
| 9 | [Kin Insurance](https://www.tamtam.ai/c/kin-insurance) (kin.com)
A home insurance company utilizing vast property data to provide customized coverage at low prices through a user-friendly online platform | Insurance | ๐บ๐ธ Chicago | 707 | 2016 |
| 10 | [HomeSchooling](https://www.tamtam.ai/c/homeschooling-chicago) (alquranhome.com)
An online educational institute for teaching the Holy Quran, offering one-to-one learning with qualified teachers, hi-tech facilities, and flexible scheduling options | E-Learning Providers | ๐บ๐ธ Chacago | 639 | 2005 |
| 11 | [Forex Trading Unlocked Inc.](https://www.tamtam.ai/c/forex-trading-unlocked-inc) (forex-trading-unlocked.com)
An online trading hub providing daily content and resources for Forex, Futures, Stocks, Options, Cryptocurrencies, and Binary Options traders worldwide No membership or login required | Capital Markets | ๐บ๐ธ Glenview | 601 | |
| 12 | [LTD Commodities](https://www.tamtam.ai/c/ltd-commodities) (ltdcommodities.com)
A leading eCommerce and catalog retailer offering top-quality merchandise at great value, including fashion, home goods, gifts, and toys | Retail | ๐บ๐ธ Lincolnshire | 582 | 1963 |
| 13 | [Vivid Seats](https://www.tamtam.ai/c/vivid-seats) (vividseats.com)
An online ticket marketplace based in Chicago, dedicated to connecting fans with live events, artists, and teams across North America | Technology, Information and Internet | ๐บ๐ธ Chicago | 521 | 2001 |
| 14 | [NinjaTrader](https://www.tamtam.ai/c/ninjatrader) (ninjatrader.com)
Industry-leading trading platform and futures broker with a flagship product offering advanced charting, market analytics, trading system development, trade simulation, and real-time data feeds | Financial Services | ๐บ๐ธ Chicago | 520 | 2004 |
| 15 | [Braintree](https://www.tamtam.ai/c/braintree) (paypal.com)
A global leader in mobile payments, providing commerce tools for merchants to accept payments in multiple currencies and methods securely | Financial Services | ๐บ๐ธ Chicago | 232 | |
| 16 | [PersonalizationMall.com](https://www.tamtam.ai/c/personalizationmall-com) (personalizationmall.com)
A provider of customizable keepsake items with industry-leading personalization techniques, part of a family of brands offering everyday gifting products | Retail | ๐บ๐ธ Burr Ridge | 219 | 1998 |
| 17 | [Honeycomb Insurance](https://www.tamtam.ai/c/honeycomb-insurance) (honeycombinsurance.com)
This company offers customized insurance policies for real estate properties using AI and computer vision, providing unbeatable rates with a transparent digital platform | Insurance | ๐บ๐ธ Chicago | 202 | 2019 |
| 18 | [Hostway](https://www.tamtam.ai/c/hostway) (hostway.com)
The company supports innovators and entrepreneurs in achieving online success, aiming to improve the web environment collaboratively | Technology, Information and Internet | ๐บ๐ธ Chicago | 202 | 1998 |
| 19 | [Jungle Scout](https://www.tamtam.ai/c/jungle-scout) (junglescout.com)
A leading platform for selling on Amazon, providing business management solutions and market intelligence resources to help entrepreneurs achieve success | Technology, Information and Internet | ๐บ๐ธ Chicago | 161 | 2015 |
| 20 | [OpticsPlanet, Inc.](https://www.tamtam.ai/c/opticsplanet-inc) (opticsplanet.com)
Specializing in technical gear, OpticsPlanet offers a vast selection of high-performance products from top brands, exceptional customer service, and knowledgeable team members | Retail | ๐บ๐ธ Northbrook | 131 | 2000 |
| 21 | [One Step Ahead](https://www.tamtam.ai/c/one-step-ahead) (wards.com)
An online and catalog retailer specializing in problem-solving products for babies, children, and parents, with a focus on research, testing, and customer feedback | Consumer Goods | ๐บ๐ธ Northbrook | 82 | 1989 |
| 22 | [Alice & Wonder](https://www.tamtam.ai/c/alice-and-wonder) (aliceandwonder.com)
Online shop curating affordable and stylish clothing, accessories, and home decor for the everyday woman, focusing on mixing and matching to create unique looks | Retail | ๐บ๐ธ Chicago | 64 | 2015 |
| 23 | [STX](https://www.tamtam.ai/c/stx) (stxapp.io)
A sports betting exchange platform combining traditional financial market infrastructure for a unique user experience | Technology, Information and Internet | ๐บ๐ธ Chicago | 22 | 2020 |
| 24 | [BayRu, LLC](https://www.tamtam.ai/c/bayru-llc) (godaddy.com)
US-Russia ecommerce specialist for drop shipping, parcel shipping, and marketing services, connecting American sellers to Russian/CIS consumers with efficient delivery and competitive prices | Technology, Information and Internet | ๐บ๐ธ Morton Grove | 22 | 2007 |
| 25 | [StaalX](https://www.tamtam.ai/c/staalx) (staalx.com)
Online platform connecting buyers and sellers, offering diverse listings, quick payments, and secure, fast product delivery for commercial transactions. | Internet Marketplace Platforms | ๐บ๐ธ Chicago | 9 | 2021 |
| 26 | [Go Custom](https://www.tamtam.ai/c/go-custom) (gocustom.com)
An e-commerce company specializing in digital design and custom printing of apparel, such as t-shirts and hoodies, based on customer preferences | Retail Apparel and Fashion | ๐บ๐ธ Thornton | 5 | |
| 27 | [Arbithub](https://www.tamtam.ai/c/arbithub) (arbithub.com)
E-commerce tool providing data-driven support to Amazon sellers in North America, specializing in online arbitrage opportunities for reselling success | Software Development | ๐บ๐ธ Chicago | 2 | |
## How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 11, 2026.
## More company lists in Illinois
- [The largest companies in Illinois](https://www.tamtam.ai/l/largest-companies-illinois) (4,687)
- [Multinational companies in Illinois](https://www.tamtam.ai/l/multinational-companies-illinois) (831)
- [Manufacturers in Illinois](https://www.tamtam.ai/l/manufacturers-illinois) (528)
- [Education providers in Illinois](https://www.tamtam.ai/l/education-companies-illinois) (370)
- [Financial services firms in Illinois](https://www.tamtam.ai/l/financial-services-firms-illinois) (352)
- [Professional services firms in Illinois](https://www.tamtam.ai/l/professional-services-firms-illinois) (339)
- [Companies with in-house R&D in Illinois](https://www.tamtam.ai/l/r-and-d-companies-illinois) (322)
- [Hardware manufacturers in Illinois](https://www.tamtam.ai/l/hardware-companies-illinois) (296)
- [IT Services and IT Consulting companies in Illinois](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-illinois) (294)
- [Hospitals and Health Care companies in Illinois](https://www.tamtam.ai/l/hospitals-and-health-care-companies-illinois) (280)
- [IT services companies in Illinois](https://www.tamtam.ai/l/it-services-companies-illinois) (274)
- [Healthcare providers in Illinois](https://www.tamtam.ai/l/healthcare-providers-illinois) (262)
- [Retail chains in Illinois](https://www.tamtam.ai/l/retail-chains-illinois) (260)
- [Financial Services companies in Illinois](https://www.tamtam.ai/l/financial-services-companies-illinois) (248)
- [Critical infrastructure operators in Illinois](https://www.tamtam.ai/l/critical-infrastructure-operators-illinois) (241)
- [Consulting firms in Illinois](https://www.tamtam.ai/l/consulting-firms-illinois) (238)
- [Logistics companies in Illinois](https://www.tamtam.ai/l/logistics-companies-illinois) (228)
- [Transportation, Logistics, Supply Chain and Storage companies in Illinois](https://www.tamtam.ai/l/transportation-logistics-supply-chain-and-storage-companies-illinois) (215)
- [SaaS companies in Illinois](https://www.tamtam.ai/l/saas-companies-illinois) (182)
- [Companies with a mobile app in Illinois](https://www.tamtam.ai/l/companies-with-mobile-app-illinois) (178)
- [Family-owned companies in Illinois](https://www.tamtam.ai/l/family-owned-companies-illinois) (166)
- [Subscription businesses in Illinois](https://www.tamtam.ai/l/subscription-businesses-illinois) (160)
- [Corporate groups and holding companies in Illinois](https://www.tamtam.ai/l/holding-companies-illinois) (154)
- [Publicly traded companies in Illinois](https://www.tamtam.ai/l/publicly-traded-companies-illinois) (154)
## The same list elsewhere in United States
- [Online-only businesses in the United States](https://www.tamtam.ai/l/online-only-businesses-united-states) (868)
- [Online-only businesses in California](https://www.tamtam.ai/l/online-only-businesses-california) (258)
- [Online-only businesses in New York State](https://www.tamtam.ai/l/online-only-businesses-new-york-state) (165)
- [Online-only businesses in Florida](https://www.tamtam.ai/l/online-only-businesses-florida) (48)
- [Online-only businesses in Texas](https://www.tamtam.ai/l/online-only-businesses-texas) (44)
- [Online-only businesses in New York](https://www.tamtam.ai/l/online-only-businesses-new-york) (138)
- [Online-only businesses in San Francisco](https://www.tamtam.ai/l/online-only-businesses-san-francisco) (95)
- [Online-only businesses in Los Angeles](https://www.tamtam.ai/l/online-only-businesses-los-angeles) (48)
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Source: https://www.tamtam.ai/l/online-only-businesses-illinois