These Rotterdam-based companies are primarily engaged in consulting and professional services, with a notable presence in IT, financial services, and specialized maritime consulting. The list includes a mix of established firms with decades of experience and more recently founded companies, indicating a dynamic business environment.
Key players include CGI Nederland, a global IT and business consultancy, and Moore DRV, which offers accounting and advisory services. Ecorys specializes in public policy research and consulting, while Schoo & Co. provides specialized services to the insurance, shipping, and offshore industries. SKIM is a global insights agency focusing on decision-making, and valantic NL develops digital solutions and consulting services.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
CGI Nederlandcgi.com
Established in 1976, a global leader in IT and business consultancy, offering insights and results-driven solutions across 21 industries worldwide |
1,435 | |||
| 2 |
Moore DRVmoore-drv.nl
Accountants and advisors supporting entrepreneurs in the real economy with expert insights, solutions, and support for lasting improvements in business performance |
1,335 | |||
| 3 |
Ecorysecorys.com
This company provides research, consulting, communications, and management services to develop, deliver, and evaluate public policy on an international scale |
954 | |||
| 4 |
Schoo & Co.schooco.nl
A global consulting firm offering specialized services to insurance, shipping, and off-shore industries with a focus on expertise, sustainability, and client-centric approach |
629 | |||
| 5 |
VPSvpsveritas.com
A global leader in maritime decarbonisation advisory services, providing innovative testing and inspection solutions to optimize performance while reducing environmental impact |
561 | |||
| 6 |
SKIMskimgroup.com
Global insights agency specializing in understanding decision-making for consumers, healthcare, and B2B professionals Offers practical marketing solutions through rigorous research techniques |
513 | |||
| 7 | 500 | ||||
| 8 |
valantic NLvalantic.com
Develops digital solutions, consulting services, and software, focusing on e-business, digital commerce, and marketing to integrate digital channels for client growth. |
478 | |||
| 9 |
KOTUG Internationalkotug.com
A leading international towage and maritime company providing vessel services, training, and consultancy with a focus on innovation and sustainability |
426 | |||
| 10 | 406 | ||||
| 11 |
Ortec Financeortecfinance.com
Provides advanced software models and technology for investment decision making, risk management, and financial planning to global financial institutions. |
399 | |||
| 12 |
Rebelrebelgroup.com
Development and advisory of public-private partnerships, innovative financing, project delivery, investment management, and strategic consulting across sustainability and social sectors. |
346 | |||
| 13 |
Profourceprofource.com
Profource is a service-oriented Oracle specialist with nearly 300 professionals, offering expertise in Finance & ERP to optimize, manage, and utilize Oracle Applications effectively |
265 | |||
| 14 |
Flo Group, Part of Accentureflo-group.com
A global team working with organizations to optimize logistics performance, drive business transformation, and deliver value through supply chain solutions |
251 | |||
| 15 |
Brink | bouw, infra en vastgoedbrink.nl
A company in the heart of construction, infrastructure, and real estate, providing management services, software products, and financial solutions with a diverse team and expertise |
240 | |||
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. | |||||
| 16 |
Ecclesia Risk & Benefitsecclesia.nl
Ecclesia is a consultancy and business service provider specializing in risk management, employee benefits, and insurance for a wide range of organizations |
239 | |||
| 17 |
Marsh Netherlandsmarsh.nl
A global risk advisor and insurance broker focused on helping clients navigate complex environments and achieve positive outcomes through data-driven solutions |
190 | |||
| 18 |
Rho Adviseursrho.nl
Rho advisors for living space excel in navigating Dutch spatial challenges, balancing interests, and delivering practical, reliable planning solutions Connect via website or Twitter |
185 | |||
| 19 | 154 | ||||
| 20 |
The Offshore Partners BVtheoffshorepartners.com
The Offshore Partners provides technical and project management services for offshore energy projects, vessel new-builds, and operational support services |
104 | |||
| 21 |
Dux Groupduxgroup.nl
Consulting services in data, security, cloud infrastructure, and process management to fully utilize talent and support digital transformation. |
77 | |||
| 22 |
Shared | Boosters of progressionshared.nl
This company helps organizations improve efficiency, modernize digital work environments, achieve goals, and ensure relevancy by deploying scarce talent and innovative digital solutions |
68 | |||
| 23 |
Finalisefinalise.nl
Finalise is a team of enthusiastic consultants specializing in finance, control, subsidies, and SAP, offering unique pragmatic solutions for efficient business processes |
59 | |||
| 24 |
AF Advisorsaf-advisors.nl
Consultancy boutique providing tailored investment, organizational, regulatory, structuring, and strategy solutions for asset owners and financial institutions. |
58 | |||
| 25 |
Better Futurebetter-future.com
This social impact consulting firm helps clients embed social commitments into strategic agendas through systemic change, leadership development, and organizational psychology |
57 | |||
| 26 |
AllChiefsallchiefs.nl
A consultancy prioritizing people and sustainability, building future-proof organizations with expertise in strategy, data, and impact-driven transformations for successful outcomes |
45 | |||
| 27 |
HDI Risk Consulting (HRC)hrc-services.nl
HRC provides risk consulting services to businesses worldwide, offering expertise in analyzing and reducing a wide range of risks to improve business continuity |
41 | |||
| 28 |
Tech Consulting Grouperasmusconsulting.io
Aiming to assist startups and scale-ups, our company offers consultancy services to address business challenges, connect technology with growth opportunities, and provide hands-on experience for students |
39 | |||
| 29 |
Deg | thuis in projectbeheersingdeggroep.nl
A specialized consultancy providing project management advice and training, connecting talented individuals with technical companies, focusing on experience, knowledge, and quality |
37 | |||
| 30 |
DZP. Partner in publiek en privaatdzp.nl
An innovative consulting firm specializing in urban development, sustainability, and economic growth by connecting entrepreneurs, governments, and communities for transformative solutions |
26 | |||
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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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