Top Tech Companies in Illinois (10,000+)

We're a global tech care company keeping nearly every device and appliance in your home running smoothly. Trusted by more than 100 leading brands and serving over 230M customers worldwide, we deliver tech support, repair, protection, and replacements at a massive scale. From your neighborhood uBreakiFix by Asurion repair store, to in-home tech support, to global protection plans, we’re the...

From enterprise SEO efforts to boosting visibility for small businesses, Victorious is committed to shaping search marketing into a sustainable pipeline for lead generation. In an industry where competing voices shout over each other to be heard, we look the other way — to the individuals at the helm of marketing teams. Amidst the cacophony, we offer clarity, transparency, and accountability;...

Pinnaql, Inc. is a professional services consulting firm providing quality, regulatory, and operational excellence solutions to biopharmaceutical, medical device, and CDMO companies worldwide. The company specializes in laboratory validation, engineering, and compliance, helping regulated life sciences organizations navigate manufacturing challenges, reduce execution risks, and accelerate the transition from lab innovation to commercial market readiness.

Shawmut Design and Construction is a national, 100% employee-owned construction management firm. It provides construction management, preconstruction, design-build, and virtual design and construction services for clients across diverse sectors and major U.S. markets nationwide. Guided by commitments to safety, quality, collaboration, ownership, and innovation, Shawmut focuses on delivering a better building experience and building lasting partnerships through proactive project solutions...

Founded in 2011, GeoComply provides fraud prevention and cybersecurity solutions that detect location fraud and help verify a user's true digital identity. Our award-winning products are based on the technologies developed for the highly regulated and complex U.S. online gaming and sports betting market. Beyond iGaming, GeoComply provides geolocation fraud detection solutions for streaming video broadcasters and the online banking,...

MasTec is a North American infrastructure engineering and construction company that designs, builds, installs, maintains, and upgrades communications, energy, utility, and civil infrastructure. Its work includes wireless and fiber networks, power delivery and generation, renewable energy facilities, oil and natural-gas pipelines, water and wastewater systems, data centers, and technology deployments. The company serves communications, energy, utility, government, and industrial customers.

Primoris Services Corporation (NYSE: PRIM) is a leading provider of critical infrastructure services to the utility, energy, and renewables markets throughout the United States and Canada. We deliver a range of engineering, construction, and maintenance capabilities that power, connect, and enhance society. On projects spanning utility-scale solar, renewables, power delivery, communications, power generation, and transportation infrastructure, we offer unmatched value...

Franklin Templeton is a global investment management organization and one of the world's largest asset managers, offering a broad range of investment capabilities across equities, fixed income, multi-asset, and alternatives.

OpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artificial intelligence benefits all of humanity. AI is an extremely powerful tool that must be created with safety and human needs at its core. OpenAI is dedicated to putting that alignment of interests first — ahead of profit. To achieve our mission, we must encompass and value the...

GCON Inc. is a full-service construction management firm providing value-based services nationwide. The company specializes in planning, budgeting, scheduling, procurement, and execution for clients across diverse sectors, including aviation, healthcare, education, industrial, and hospitality. GCON aims to elevate the construction experience by forging dedicated partnerships and building highly specialized teams that advance project work and fuel their commitment to serve...

Alloy provides a robotics data platform that unifies images, time-series telemetry and logs so engineers can search and analyze robot missions in plain English. The product creates instant mission reports, auto-clusters similar failures across fleets, and surfaces patterns for faster debugging and training data generation—accelerating development and reducing time spent hunting for relevant robot data.

Securitize is a global fintech, Top 50 blockchain company, with a mission to provide investors with access to invest in and trade alternative assets, and for companies to raise capital and offer shareholder's liquidity. Securitize has pioneered a fully digital, regulatory compliant, end-to-end platform for issuing, managing and trading digital asset securities (also known as security tokens), with over 200...

Family & Nursing Care is a family-owned and operated resource for private duty home care services in the Washington, DC metropolitan area. Founded in 1968, the company specializes in referring high-quality in-home caregivers to clients, empowering older adults to live safely and independently in their own homes while providing peace of mind to their families.

Founded by the world’s foremost change expert Dr. John Kotter, Kotter is a consulting firm that partners with clients to achieve blockbuster results faster than leaders believed possible. With offices in Seattle and Boston and team members located across the world, our consulting practice help organizations accelerate the implementation of their most critical business strategies. Our tailored leadership development programs...

Landmark Hospitality is a vertically integrated company that owns and operates a portfolio of distinctive venues, boutique hotels, and renowned restaurants, primarily in New Jersey and Pennsylvania.

Faros provides a token-engineering platform for organizations using AI coding agents. It connects agents, harnesses, and engineering systems, linking sessions, commits, pull requests, and token usage into a live view of engineering work. The platform analyzes code history to identify effective model routes and context, then applies approved routing, budgets, and compliance policies. It also measures AI engineering outcomes and...

We're Twelve, the carbon transformation company. We turn CO2 into chemicals, materials and fuels through the science of electrochemistry and technology that works like industrial photosynthesis.

Established in 1975, Delta Galil Industries (TASE: DELG) is a global manufacturer and marketer of Private Label apparel products for men, women and children as well as owner of leading apparel and fashion brands such as 7 For All Mankind, Schiesser, PJ Salvage, Eminence, Delta and more… At Delta Galil, our experts leverage the company's vast knowledge base and core...

Curinos provides decision intelligence for financial institutions, helping them understand customers and improve business outcomes. Its AI-first platform combines proprietary data, advanced analytics, and financial-services expertise to deliver timely recommendations within teams’ workflows. The company also offers simulation-based optimization tools, alongside intelligent data, comparative analytics, and optimization platforms for banks, mortgage lenders, credit unions, fintechs, and insurance providers, supporting better...

Warm Hearth Village is a nonprofit 55+ retirement community on a 220-acre woodland campus in Blacksburg, Virginia, in the Blue Ridge Mountains. Founded by Dutch immigrants Wybe and Marietje Kroontje as an expression of gratitude to America, it offers active adult living, independent living, assisted living, memory care, skilled and long-term nursing care, plus home health, home care and hospice...