These Illinois-based companies are managed service providers, predominantly offering IT services and consulting. They range from large established firms like YASH Technologies, a global digital transformation partner with 8,670 employees, to mid-sized companies such as AHEAD, specializing in digital platform management, and Ensono, a technology adviser for digital transformation. CyberTech Systems and Software focuses on Enterprise Cloud Transformation, while Sentinel Technologies provides IT solutions with an emphasis on communication and data centers.
The data shows a strong concentration of these companies in the Chicago metropolitan area, including headquarters in Chicago itself, Downers Grove, Oak Brook, and Bannockburn. Many of these firms were founded between the late 1980s and early 2000s, indicating a mature sector with a mix of experience in providing IT, cybersecurity, and cloud solutions.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
YASH Technologiesyash.com
Consulting-led digital transformation partner offering technology, advisory, and outsourcing services to optimize client performance and revenue growth globally. |
8,670 | |||
| 2 | 4,223 | ||||
| 3 |
Ensonoensono.com
Ensono is a technology adviser and managed service provider, specializing in digital transformation, cloud migration, and application modernization for businesses worldwide |
3,646 | |||
| 4 |
CyberTech Systems and Software, Inccybertech.com
Specializing in Enterprise Cloud Transformation, providing Cloud-based SAP and Esri ArcGIS solutions for improved customer experiences, real-time insights, productivity, and spatial analytics integration |
860 | |||
| 5 |
Sentinel Technologiessentinel.com
Leader in IT solutions with focus on innovative, practical services for communication, data center, cloud, and managed services Recognized for employee commitment and growth |
791 | |||
| 6 |
Netrix Globalnetrixglobal.com
A global provider of cybersecurity, application development, and IT managed services, recognized for its award-winning solutions |
771 | |||
| 7 |
Impact Networking, LLCimpactmybiz.com
Providing expert-driven managed services including IT, cybersecurity, marketing, AI, and digital transformation to help businesses grow and succeed. |
764 | |||
| 8 |
Cloud5 Communicationscloud5.com
Cloud5 helps hotels, apartment buildings, and service companies enhance customer experiences with Internet, Wi-Fi, Telephony, IT, and Contact Center services, driving revenue and loyalty |
613 | |||
| 9 |
Netrixnetrixllc.com
A global provider of cybersecurity, application development, and IT managed services, recognized for its award-winning solutions |
586 | |||
| 10 |
Meridian Group International, Inc.themeridian.com
Providing global IT services including cybersecurity, cloud, application development, vendor management, and financial solutions to optimize business performance. |
577 | |||
| 11 |
TECEZEteceze.com
IT service provider offering a wide range of solutions, including IT managed services, hardware supply, AV solutions, remote working, security protection, and more |
428 | |||
| 12 |
SDI Presencesdipresence.com
IT consultancy and managed services provider offering strategic services, IT consulting, and hybrid multicloud infrastructure solutions to optimize technology environments for various industries |
411 | |||
| 13 |
Ascend Technologiesteamascend.com
An award-winning MSP in Chicago offering cybersecurity, infrastructure, and Salesforce solutions, with a focus on innovation, expertise, and exceptional service Join #TeamAscend! |
311 | |||
| 14 |
STL Business & Technology Solutionsstl-bts.com
Delivering innovative IT services, reliable staffing solutions, state-of-the-art Cloud & Data Center services, Managed IT, Cybersecurity, and diverse staffing options |
249 | |||
| 15 |
Maven Wave, an Eviden Companyatos.net
Leading next-generation technology company specializing in data-driven, trusted, and sustainable digital transformation with expertise in AI, cloud, security, and advanced computing. |
241 | |||
| 16 |
Hostwayhostway.com
The company supports innovators and entrepreneurs in achieving online success, aiming to improve the web environment collaboratively |
202 | |||
| 17 |
Paragon Microparagonmicro.com
A technology provider known for impressive growth, industry accolades, and solving problems creatively while integrating people, technology, and business needs |
200 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 18 |
DSN Groupdsngroup.net
DSN Group offers cost-effective IT solutions for managing infrastructure, including servers, network security, storage, and data management, with a focus on leveraging current assets |
196 | |||
| 19 |
MNJ Technologiesmnjtech.com
IT solution provider helping midmarket-to-enterprise customers increase productivity and reduce costs through personalized technology solutions, services, and digital transformation |
174 | |||
| 20 |
Lyra Technology Grouplyratechgroup.com
Leading IT services provider for small and medium-sized organizations, serving over 10,000 clients globally with a focus on retaining original culture and brand |
83 | |||
| 21 |
NPO USA Incnpousa.com
A leading IT service provider specializing in digital transformation, cloud solutions, DevOps, cybersecurity, compliance, and IT management as part of the Ricoh Group |
38 | |||
| 22 |
AIS, Inc.aislabs.com
Full-service IT Technology Firm specializing in Infrastructure, Virtualization, Consulting, Cloud Hosting, Security, and Managed Services for various sectors Complete solution for business technology needs |
37 | |||
| 23 |
Framework ITframeworkit.com
Managed IT services provider specializing in support, strategy, and security to create agile IT environments, empower growth, and lead businesses in technology |
35 | |||
| 24 |
Peters & Associates (Acquired by Ascend Technologies)teamascend.com
This company enables business growth through innovative IT solutions, secure systems, and optimized user productivity, helping businesses expand and innovate |
34 | |||
| 25 |
CITYTECH, Inc. (Now part of ICF Olson)icfolson.com
A global technology and marketing enablement company specializing in digital strategy, enterprise app development, web management, mobile solutions, and cloud services for business success |
18 | |||
| 26 |
Nine Boardsnineboards.com
A global consultancy specializing in SAP, Microsoft, and Looker services, offering consulting, implementation, hosting, managed services, and support for digital transformation |
16 | |||
| 27 |
SDS Technologysdstech.net
A technology company offering expertise, services, and innovative solutions since 1984 Partnered with top vendors to provide cutting-edge technology upgrades and support |
10 | |||
| 28 |
CMIT Solutions of North Lake Countycmitsolutions.com
Professional IT support and technology services provider specializing in proactive maintenance, monitoring, and backups for businesses to ensure efficient, safe, and reliable IT environments |
9 | |||
| 29 | 6 | ||||
| 30 |
EBTS USAebtsusa.com
Trusted IT managed services provider offering industry solutions, business process expertise, and application services to modernize and support agile, resilient businesses globally |
5 | |||
| 31 |
Digimite Technologymydigimite.com
A global managed services provider supporting medium to large businesses with IT infrastructure and strategy, ensuring world class customer value |
4 | |||
| 32 |
TriForma Techtriforma.com
Offering a range of IT services such as server maintenance, disaster recovery, cloud solutions, cyber security, and asset management to ensure business success |
4 | |||
| 33 |
Datastrivedatastrive.com
Provider of comprehensive IT services including Managed IT Support, Cybersecurity, Cloud Solutions, aiming to streamline operations, enhance security, and drive growth |
3 | |||
| 34 | 
Outsource IT Solutions Group, Inc.osgusa.com
A Naperville-based company offering outsourced IT services to businesses in the Chicago area, specializing in network information technology solutions |
3 | |||
| 35 |
Twinbee Serverstwinbeeservers.com
A hosting company since 2013, providing top-notch services and customer support In-house experts ensure safe, secure, and personalized hosting solutions |
2 | |||
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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.
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