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Explore Software Development Companies Serving Illinois

Review the services of 24 software development companies in Illinois, including Chicago, Crystal Lake and Itasca. Whether you need custom applications, system integration or ongoing software support, look for relevant developers and inquire about availability and pricing.
Chicago (15)
Crystal Lake (1)
Itasca (1)
Naperville (1)
Normal (1)
Oak Brook (1)
Oregon (1)
Schaumburg (1)
Sycamore (1)
Urbana (1)
Ntiva
22 Years
Emergency
Not rated yet
Ntiva
22 Years
Emergency
Not rated yet
We offer 24/7 access to 700+ IT experts with 15+ years average experience
Ntiva delivers 24/7 managed IT services, cybersecurity, and strategic technology solutions to businesses across the United States. Trusted by thousands for rapid response times and expert support.
Managed IT Services Co-Managed IT Support Managed Cybersecurity
(312) 554-5699 Call Profile
Not rated yet
Caxy Interactive
27 Years
Not rated yet
24+ years experience solving complex technical business challenges
Caxy Interactive delivers custom software and digital transformation strategies for businesses overcoming scaling challenges. Located in Chicago since 1999.
Custom Software Development Digital Transformation Technology Strategy
(312) 207-6200 Call Profile
CSW Solutions
17 Years
Emergency
Not rated yet
CSW Solutions
17 Years
Emergency
Not rated yet
We offer 16+ years of experience in enterprise software development
CSW Solutions offers custom software development and Microsoft Azure cloud services in Chicago, focusing on innovation, security, and client success through 16+ years of expertise and Microsoft Gold-certified professionals.
.NET Development Azure Migration Web Application Development
(312) 263-7704 Call Profile
Not rated yet
CNX Corp
30 Years
Not rated yet
We offer 28 years of IBM i modernization expertise
CNX Corp's Valence platform delivers low-code application development for IBM i environments, helping enterprises modernize legacy systems and improve operational efficiency since 1996.
Low-Code App Builder Developer Toolkit Portal Management
(312) 251-0840 Call Profile
Not rated yet
Milyli
18 Years
Not rated yet
Over 125,000 hours of Relativity development experience
Milyli offers powerful eDiscovery software solutions like Blackout, Chronicle, and Delegate, designed to streamline legal workflows and enhance efficiency for top legal organizations.
Blackout Chronicle Delegate
(312) 265-0136 Call Profile
Billennium
23 Years
Emergency
Not rated yet
Billennium
23 Years
Emergency
Not rated yet
We offer 20+ years of experience delivering IT services for global enterprises
Billennium offers expert IT staffing, managed services, and tech solutions with 20+ years of experience and a global team of 1500+ professionals across 13 offices.
Expert Staffing Managed Services Tech Solutions
(773) 327-2000 Call Profile
Not rated yet
Atomic Object
25 Years
Not rated yet
We offer 20+ years of experience in complex software systems.
Atomic Object crafts custom software solutions with AI integration, agile development, and client-focused design since 2001. Partner with our U.S.-based experts for scalable, secure applications.
Custom Software Development AI Integration Agile Development
(616) 776-6020 Call Profile
Not rated yet
Modularis
28 Years
Not rated yet
25 years delivering enterprise software solutions with $285M+ exit value created
Transform software development with Modularis' AI-powered PlatformBuilder. Reduce coding time by 80%, achieve 90-day product launches, and convert technical debt into revenue-generating solutions.
Software Development Platform Builder Tech 360 Assessment
(312) 781-1220 Call Profile
Not rated yet
Red Axle
Not rated yet
We leverage proprietary frameworks to accelerate development timelines
Red Axle delivers high-performance software solutions with rapid development cycles, ensuring security and user experience. Partner with our onshore experts for mobile, web, and AI-driven applications across healthcare, logistics, and real estate industri
Mobile App Development SaaS App Development Web Development
(855) 733-2953 Call Profile
Not rated yet
SYDCON Web Development
22 Years
Not rated yet
We deliver tailored software solutions aligned with specific business requirements
Leading Chicago software development company creating custom web, mobile, and enterprise applications since 2004. Expertise in secure, scalable solutions for healthcare, finance, and manufacturing industries.
Software Development iOS App Development Web Application Development
(815) 596-9030 Call Profile