# The 30 largest IT Services and IT Consulting companies in Rotterdam

Tamtam tracks 30 IT Services and IT Consulting companies headquartered in Rotterdam. This list ranks all of them by number of employees on LinkedIn, led by Croonwolter&dros, CGI Nederland and Ortec Finance. Their median headcount is 19. Half of them were founded in 2017 or later.

The IT Services and IT Consulting companies in Rotterdam are a mix of large established firms and younger specialized companies. Croonwolter&dros, founded in 1875, specializes in intelligent systems and sustainable solutions, while CGI Nederland, established in 1976, is a global leader in IT and business consultancy. Ortec Finance provides software for investment decision-making, and Flo Group, Part of Accenture, works on optimizing logistics performance. Avantage IT focuses on optimizing business through IT services, and Ciphix solves business challenges with practical IT solutions.

Many of these companies, such as Intermax with its secure cloud solutions and Blockbax with its IoT and sensor data analysis, demonstrate a strong focus on advanced technology and data-driven solutions. The presence of companies like DASA, specializing in DevOps and Agile, also indicates a trend towards modern development methodologies.

🇳🇱 Rotterdam · 30 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Croonwolter&dros](https://www.tamtam.ai/c/croonwolter-and-dros) (croonwolterendros.nl)<br>The company specializes in creating intelligent systems and sustainable solutions in electrical and mechanical engineering, automation, and information technology for clients | IT Services and IT Consulting | 🇳🇱 Rotterdam | 2,864 | 1875 |
| 2 | [CGI Nederland](https://www.tamtam.ai/c/cgi-nederland) (cgi.com)<br>Established in 1976, a global leader in IT and business consultancy, offering insights and results-driven solutions across 21 industries worldwide | IT Services and IT Consulting | 🇳🇱 Rotterdam | 1,435 | 1976 |
| 3 | [Ortec Finance](https://www.tamtam.ai/c/ortec-finance) (ortecfinance.com)<br>Provides advanced software models and technology for investment decision making, risk management, and financial planning to global financial institutions. | IT Services and IT Consulting | 🇳🇱 Rotterdam | 399 | 1981 |
| 4 | [Flo Group, Part of Accenture](https://www.tamtam.ai/c/flo-group-part-of-accenture) (flo-group.com)<br>A global team working with organizations to optimize logistics performance, drive business transformation, and deliver value through supply chain solutions | IT Services and IT Consulting | 🇳🇱 Rotterdam | 251 | 2007 |
| 5 | [Avantage IT](https://www.tamtam.ai/c/avantage-it) (avantage.nl)<br>The company focuses on providing quality IT services to help customers optimize their business through information, communication, technology, productivity, and mobility | IT Services and IT Consulting | 🇳🇱 Rotterdam | 204 | 1990 |
| 6 | [Ciphix](https://www.tamtam.ai/c/ciphix) (ciphix.io)<br>A tech-savvy company solving business challenges through practical solutions Specializing in simplifying complex processes with expertise in IT and business operations | IT Services and IT Consulting | 🇳🇱 Rotterdam | 154 | 2018 |
| 7 | [Intermax](https://www.tamtam.ai/c/intermax) (intermax.nl)<br>Intermax specializes in designing and managing secure cloud solutions to support critical processes using cutting-edge technology and highly qualified professionals | IT Services and IT Consulting | 🇳🇱 Rotterdam | 151 | 1994 |
| 8 | [DASA](https://www.tamtam.ai/c/dasa-rotterdam) (dasa.org)<br>The company is a leading industry body specializing in DevOps and Agile, assisting enterprises in digital transformation through knowledge, guidance, and community support | IT Services and IT Consulting | 🇳🇱 Rotterdam | 146 | 2016 |
| 9 | [Alphacomm - the revenue boosting platform](https://www.tamtam.ai/c/alphacomm-the-revenue-boosting-platform) (alphacomm.io)<br>A pioneering FinTech company providing secure online payment processing, fraud prevention, and pre-paid solutions with cutting-edge API-based technology globally | IT Services and IT Consulting | 🇳🇱 Rotterdam | 101 |  |
| 10 | [XSARUS \| Digital Commerce](https://www.tamtam.ai/c/xsarus-digital-commerce) (xsarus.nl)<br>XSARUS is a top digital commerce agency in the Benelux market, specializing in omnichannel e-commerce for manufacturers, wholesalers, and retailers | IT Services and IT Consulting | 🇳🇱 Rotterdam | 92 | 2000 |
| 11 | [railcube](https://www.tamtam.ai/c/railcube) (railcube.com)<br>RailCube offers a comprehensive ERP solution for Railway Undertakings, improving operations management with innovative features and a mobile application for efficient communication | IT Services and IT Consulting | 🇳🇱 Rotterdam | 59 | 2011 |
| 12 | [Blue Horizon Technologies](https://www.tamtam.ai/c/blue-horizon-technologies) (bluehorizon.nl)<br>A software company based in the Netherlands that develops platforms and applications to analyze and solve complex problems using data | IT Services and IT Consulting | 🇳🇱 Rotterdam | 31 | 2003 |
| 13 | [Bugs Business](https://www.tamtam.ai/c/bugs-business) (bugsbusiness.nl)<br>We are advisors and software providers for the insurance industry, offering solutions to make business operations more efficient with clear platforms and exceptional customer support | IT Services and IT Consulting | 🇳🇱 Rotterdam | 25 | 2011 |
| 14 | [Blockbax](https://www.tamtam.ai/c/blockbax) (blockbax.com)<br>This company assists businesses in leveraging IoT and sensors to collect and analyze data for improved agility and efficiency | IT Services and IT Consulting | 🇳🇱 Rotterdam | 20 | 2017 |
| 15 | [Drive Consulting](https://www.tamtam.ai/c/drive-consulting-rotterdam) (driveconsulting.nl)<br>Drive is an Agile consultancy firm focused on empowering organizations to improve services, products, and collaborations by fostering a proactive Agile mindset among clients | IT Services and IT Consulting | 🇳🇱 Rotterdam | 19 | 2019 |
| 16 | [Procys](https://www.tamtam.ai/c/procys-rotterdam) (procys.com)<br>A technology company dedicated to automating routine work processes, offering services like data extraction, invoice processing, and customized solutions for businesses | IT Services and IT Consulting | 🇳🇱 Rotterdam | 19 | 2018 |
| 17 | [Clockworks](https://www.tamtam.ai/c/clockworks) (clockworks.co)<br>A leading AI innovator in Rotterdam, specializing in high-performance AI solutions focused on computer vision and unstructured data integration for businesses worldwide | IT Services and IT Consulting | 🇳🇱 Rotterdam | 15 | 2017 |
| 18 | [Kuikco](https://www.tamtam.ai/c/kuikco) (kuikco.com)<br>Provider of data labelling, annotation, and localization solutions for enhancing AI systems, specializing in Western European languages at the data & language intersection | IT Services and IT Consulting | 🇳🇱 Rotterdam | 12 | 2019 |
| 19 | [Active Professionals](https://www.tamtam.ai/c/active-professionals) (cmotions.com)<br>Active Professionals is a Dutch intelligence company specializing in transforming data into valuable insights, offering personalized solutions with a passionate team of data specialists | IT Services and IT Consulting | 🇳🇱 Rotterdam | 11 |  |
| 20 | [Tradetomato](https://www.tamtam.ai/c/tradetomato) (tradetomato.com)<br>Next-gen trade and portfolio automation platform, managing crypto finances across wallets, exchanges, and financial crypto services with AI and machine learning. | IT Services and IT Consulting | 🇳🇱 Rotterdam | 10 | 2021 |
| 21 | [DataRocks](https://www.tamtam.ai/c/datarocks) (datarocks.eu)<br>A consulting company passionate about data analytics, focused on improving enterprise data analytics for Financial, Retail, and FMCG industries | IT Services and IT Consulting | 🇳🇱 Rotterdam | 9 | 2018 |
| 22 | [Agnicio](https://www.tamtam.ai/c/agnicio) (agnicio.com)<br>Incorporating data analytics, Agnicio empowers organizations with transformative insights to drive informed decisions, strategic choices, growth, and innovation | IT Services and IT Consulting | 🇳🇱 Rotterdam | 9 | 2005 |
| 23 | [PromptTalents](https://www.tamtam.ai/c/prompttalents) (prompttalents.com)<br>PromptTalents trains AI-powered marketers to push boundaries, accelerate marketing output, and scale departments for leading companies in the digital age | IT Services and IT Consulting | 🇳🇱 Rotterdam | 8 | 2023 |
| 24 | [in4Data](https://www.tamtam.ai/c/in4data) (in4datascience.com)<br>Transforming data from a secondary concern to the heart of business operations, enabling improved customer insights, increased margins, and smoother processes for companies Contact for expert assistance | IT Services and IT Consulting | 🇳🇱 Rotterdam | 7 | 2015 |
| 25 | [Unchained Carrot](https://www.tamtam.ai/c/unchained-carrot) (unchainedcarrot.com)<br>A marketing software platform that helps businesses create content, boost sales, and increase traffic online and offline with automation, rewards, events, and advanced analytics | IT Services and IT Consulting | 🇳🇱 Rotterdam | 3 | 2019 |
| 26 | [Pairo](https://www.tamtam.ai/c/pairo) (pairo.tech)<br>Specializing in optimizing business processes through Robotic Process Automation and AI to automate repetitive tasks and enhance performance cost-effectively | IT Services and IT Consulting | 🇳🇱 Rotterdam | 3 | 2019 |
| 27 | [iBilly](https://www.tamtam.ai/c/ibilly) (ibilly.co)<br>A budgeting app utilizing AI to streamline bank accounts, budgets, and saving goals, with a web dashboard providing insights and financial management solutions | IT Services and IT Consulting | 🇳🇱 Rotterdam | 2 | 2018 |
| 28 | [SMBinvoices](https://www.tamtam.ai/c/smbinvoices) (smbinvoices.com)<br>SMBinvoices specializes in AI-powered solutions for automating business processes, particularly through their Invoice Recognition API for efficient invoice processing and data extraction | IT Services and IT Consulting | 🇳🇱 Rotterdam | 2 | 2016 |
| 29 | [AI Business Academy \| AI Trainingen & Solutions](https://www.tamtam.ai/c/ai-business-academy-ai-trainingen-and-solutions) (ai-businessacademy.nl)<br>Specializing in AI-driven business optimization, we develop custom solutions to drive direct business impact through seamless integration of AI for efficiency and innovation | IT Services and IT Consulting | 🇳🇱 Rotterdam | 2 | 2023 |
| 30 | [Dataviator.ai](https://www.tamtam.ai/c/dataviator-ai)<br>Specializing in Generative AI technology, the company creates advanced AI solutions tailored to individual needs in various industries | IT Services and IT Consulting | 🇳🇱 Rotterdam | 2 | 2023 |

## 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 12, 2026.

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Source: https://www.tamtam.ai/l/it-services-and-it-consulting-companies-rotterdam