# The 28 largest IT services companies in Overijssel

Tamtam tracks 28 IT services companies headquartered in Overijssel. This list ranks all of them by number of employees on LinkedIn, led by Topicus, Schoo Computerdiensten and Odin Groep. Their median headcount is 26. Half of them were founded in 2011 or later. The most common headquarters are Enschede (7), Hengelo (6) and Zwolle (5).

These companies in Overijssel primarily operate in the IT services sector, with a focus on providing solutions for various industries. Many are mid-sized firms, though some larger entities are present. Topicus develops IT solutions for healthcare and education, while Odin Groep offers managed services and cloud solutions. Previder provides datacenter services, and Cloudwise specializes in ICT for education.

A notable concentration of these IT services companies, especially the larger ones, have their headquarters in Hengelo. This suggests a regional hub for IT infrastructure and support services within Overijssel.

🇳🇱 Overijssel · 28 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Topicus](https://www.tamtam.ai/c/topicus) (topicus.nl)<br>The company develops user-friendly IT solutions that benefit healthcare, education, finance, and social sectors, aiming to empower citizens and reduce vulnerability | IT Services and IT Consulting | 🇳🇱 Deventer | 812 | 1998 |
| 2 | [Schoo Computerdiensten](https://www.tamtam.ai/c/schoo-computerdiensten) (schoo.nl)<br>A technology company offering services for individuals and small businesses, including Microsoft 365 setup, website development, VoIP telephony, and ICT solutions consulting | Computer Hardware Manufacturing | 🇳🇱 Enschede | 726 | 2003 |
| 3 | [Odin Groep](https://www.tamtam.ai/c/odin-groep) (odin-groep.nl)<br>A group providing a secure home for IT companies and specialists, offering managed services, cloud and data center solutions, and backoffice support | IT Services and IT Consulting | 🇳🇱 Hengelo | 525 | 1990 |
| 4 | [Justitiële Informatiedienst](https://www.tamtam.ai/c/justitiele-informatiedienst) (justid.nl)<br>The company provides a system for exchanging and storing information for a comprehensive view of individuals in the criminal justice system | IT Services and IT Consulting | 🇳🇱 Almelo | 451 | 2006 |
| 5 | [Previder](https://www.tamtam.ai/c/previder) (previder.nl)<br>A Dutch datacenter company offering colocation services with direct connections to AMS-IX and DE-CIX, providing low-cost, high-quality solutions for various clients | IT Services and IT Consulting | 🇳🇱 Hengelo | 376 | 2010 |
| 6 | [Cloudwise](https://www.tamtam.ai/c/cloudwise) (cloudwise.nl)<br>The company provides ICT solutions for education, offering support, hardware, an online learning platform, and training to simplify digital teaching | IT Services and IT Consulting | 🇳🇱 Hengelo | 211 | 2010 |
| 7 | [Unica ICT](https://www.tamtam.ai/c/unica-ict) (unica.nl)<br>Innovative ICT solutions provider focused on creating value, optimizing processes, and providing digital workplace solutions, ensuring clients are future-ready and worry-free | IT Services and IT Consulting | 🇳🇱 Lemelerveld | 203 | 1993 |
| 8 | [Gladior](https://www.tamtam.ai/c/gladior) (gladior.com)<br>An experienced and innovative online marketing agency offering a wide range of services to enhance organizations' online presence and generate business | Technology, Information and Internet | 🇳🇱 Enschede | 42 | 1999 |
| 9 | [DevRepublic](https://www.tamtam.ai/c/devrepublic) (devrepublic.nl)<br>DevRepublic specializes in developing custom IT solutions with dedicated teams and consultants, focusing on writing efficient code in languages like PHP, NET, and more | Software Development | 🇳🇱 Zwolle | 35 | 2008 |
| 10 | [Brite Wireless \| Dé specialist in WiFi & ICT voor het VO onderwijs en de zorg](https://www.tamtam.ai/c/brite-wireless-de-specialist-in-wifi-and-ict-voor-het-vo-onderwijs-en-de-zorg) (brite.nl)<br>A team of specialists providing unique and groundbreaking wireless and ICT solutions for schools and healthcare, focusing on creating awareness and addressing connectivity challenges | IT Services and IT Consulting | 🇳🇱 Enschede | 35 |  |
| 11 | [MSML](https://www.tamtam.ai/c/msml) (msml.nl)<br>Providing dynamic and professional websites and web applications for small to medium-sized companies, as well as system and information security services Visit our website | Software Development | 🇳🇱 Deventer | 33 | 2012 |
| 12 | [CX](https://www.tamtam.ai/c/cx-enschede) (cuex.tech)<br>Attract, convert, and retain more leads with Inbnd, a certified HubSpot partner focused on enhancing inbound strategies for increasing leads, deals, and ambassadors | IT Services and IT Consulting | 🇳🇱 Enschede | 28 | 2019 |
| 13 | [Carthago ICT](https://www.tamtam.ai/c/carthago-ict) (carthago-ict.nl)<br>Carthago specializes in software development, security, cloud, and architecture, offering tailored services to clients in various sectors with a focus on customer satisfaction | Software Development | 🇳🇱 Hengelo | 27 | 1999 |
| 14 | [Epartment \| Commerce experts.](https://www.tamtam.ai/c/epartment-commerce-experts) (epartment.nl)<br>Innovative e-commerce organization with expertise in marketing, IT, finance systems, design, and technology, delivering tailored solutions for webshops and SAP/Accountview integration | Technology, Information and Internet | 🇳🇱 Hengelo | 26 | 2014 |
| 15 | [RYSST](https://www.tamtam.ai/c/rysst) (rysst.nl)<br>Startup connecting companies with student scrum teams for rent, led by enthusiastic entrepreneurs | Software Development | 🇳🇱 Zwolle | 23 | 2016 |
| 16 | [Suneco](https://www.tamtam.ai/c/suneco) (suneco.nl)<br>A technology company specializing in Microsoft Net solutions, with expertise in Sitecore, Sitefinity, Umbraco, Ucommerce, and DynamicWeb They focus on digital transformation and application power | IT Services and IT Consulting | 🇳🇱 Zwolle | 23 | 1989 |
| 17 | [Vivia](https://www.tamtam.ai/c/vivia-haaksbergen) (vivia.nl)<br>Vivia improves the balance between healthcare and IT by offering user-friendly, innovative, and stable ICT solutions focused on the user in the healthcare sector | Hospitals and Health Care | 🇳🇱 Haaksbergen | 19 | 2011 |
| 18 | [WeMa Mobile B.V.](https://www.tamtam.ai/c/wema-mobile-b-v) (WeMaMobile.nl)<br>Specializing in native app development since 2011, focusing on quality, service, and ROI Partnering with businesses to achieve and maintain app success | Software Development | 🇳🇱 Hardenberg | 18 | 2011 |
| 19 | [Datacadabra BV](https://www.tamtam.ai/c/datacadabra-bv) (datacadabra.nl)<br>Develops data science and artificial intelligence for practical applications, saving time and costs through smart, scalable solutions for various organizations. | IT Services and IT Consulting | 🇳🇱 Enschede | 17 | 2015 |
| 20 | [Springleaf Automation](https://www.tamtam.ai/c/springleaf-automation) (springleaf.nl)<br>Streamlines operations for businesses using Hyperautomation, combining RPA and AI to automate repetitive tasks and free up time for valuable work. | IT Services and IT Consulting | 🇳🇱 Nieuwleusen | 13 | 2020 |
| 21 | [CUMLAUDE.AI](https://www.tamtam.ai/c/cumlaude-ai) (cumlaude.ai)<br>Creating tailored Business Intelligence and Artificial Intelligence solutions for leading organizations, unleashing the power of data-driven decision-making with a team of 16 data professionals | IT Services and IT Consulting | 🇳🇱 Zwolle | 13 | 2020 |
| 22 | [Easysee](https://www.tamtam.ai/c/easysee) (easysee.eu)<br>A leading tech company specializing in AR, VR, mobile apps, and games Recognized for innovation and advancing VR technologies | Software Development | 🇳🇱 Hengelo | 12 | 2014 |
| 23 | [Seven-Winds](https://www.tamtam.ai/c/seven-winds) (seven-winds.com)<br>Specializing in cloud services and technologies, we assist businesses of all sizes in maximizing benefits through consulting services and tailored cloud solutions | IT Services and IT Consulting | 🇳🇱 Almelo | 12 | 2002 |
| 24 | [BrightFlow](https://www.tamtam.ai/c/brightflow) (brightflow.nl)<br>Custom software development company in Zwolle, focusing on creating secure, scalable, and maintainable software that enhances business workflows through intelligent solutions and user feedback | Software Development | 🇳🇱 Zwolle | 9 | 2021 |
| 25 | [Flireo B.V.](https://www.tamtam.ai/c/flireo-b-v) (flireo.nl)<br>Flireo specializes in creating AI solutions to exceed expectations, born from expertise and driven by challenges to unlock growth potential with a commitment to excellence | IT System Custom Software Development | 🇳🇱 Deventer | 5 | 2023 |
| 26 | [AxiomaSoft](https://www.tamtam.ai/c/axiomasoft) (axiomasoft.com)<br>A company specializing in turn-key solutions, outstaffing services, automation of cost-centers, AI development to increase revenue, with industry experts and in-house software engineers | IT Services and IT Consulting | 🇳🇱 Enschede | 3 | 2015 |
| 27 | [QuantumDot](https://www.tamtam.ai/c/quantumdot) (quantumdot.nl)<br>The company aims to make artificial intelligence accessible to businesses by exploring new possibilities, improving processes, delivering results, and solving complex data challenges | IT Services and IT Consulting | 🇳🇱 Oldenzaal | 2 | 2023 |
| 28 | [Intelligent Data & Internet Of Things](https://www.tamtam.ai/c/intelligent-data-and-internet-of-things) (theidiotcompany.eu)<br>The company provides intelligent data and secure sensor solutions to businesses, aiming to bring control and insight while reducing environmental impact | IT Services and IT Consulting | 🇳🇱 Enschede | 2 | 2016 |

## 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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Source: https://www.tamtam.ai/l/it-services-companies-overijssel