# Consulting firms headquartered in Warsaw

Tamtam tracks 43 consulting firms headquartered in Warsaw. This list ranks the 30 largest by number of employees on LinkedIn, led by Sii Poland, PwC Polska and Andersen Lab. Their median headcount is 490. Half of them were founded in 2005 or later.

These companies in Warsaw are primarily large consulting firms, with a strong emphasis on IT services and business consulting. Many specialize in digital transformation, software development, and advisory services across various sectors. The list includes major global players and significant regional firms.

Key companies include Sii Poland, providing technology consulting and AI-driven digital transformation; PwC Polska, offering legal, tax, business, and audit solutions; Andersen Lab, specializing in end-to-end IT services and custom software development; and Innowise, delivering advanced digital solutions using technologies like AI and Big Data. A common pattern observed is the prevalence of companies founded in the early 2000s, indicating a mature and established consulting sector in the city.

🇵🇱 Warsaw · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Sii Poland](https://www.tamtam.ai/c/sii-poland) (sii.pl)<br>Provides technology consulting, AI-driven digital transformation, engineering, and business services, supporting clients in testing, software development, infrastructure management, and system integration. | IT Services and IT Consulting | 🇵🇱 Warsaw | 6,243 | 2006 |
| 2 | [PwC Polska](https://www.tamtam.ai/c/pwc-polska) (pwc.pl)<br>Providing legal, tax, business, and audit solutions to diverse clients across sectors, supporting both large corporations and local enterprises. | Business Consulting and Services | 🇵🇱 Warsaw | 4,370 |  |
| 3 | [Andersen Lab](https://www.tamtam.ai/c/andersen-lab) (andersenlab.com)<br>Providing end-to-end IT services, custom software development, API integration, system architecture, and legacy modernization, building tailored, scalable, and secure digital products with AI, ML, Data Science. | IT Services and IT Consulting | 🇵🇱 Warsaw | 3,703 | 2007 |
| 4 | [Innowise](https://www.tamtam.ai/c/innowise) (innowise.com)<br>International software development company delivering advanced digital solutions using AI, Big Data, IoT, Blockchain, and AR/VR technologies worldwide. | IT Services and IT Consulting | 🇵🇱 Warsaw | 2,118 | 2017 |
| 5 | [KPMG Poland](https://www.tamtam.ai/c/kpmg-poland) (kpmg.com)<br>Global organization providing professional services in audit, tax, finance, legal, and consulting Improving business results, managing risks, creating strategies, and adding value | Business Consulting and Services | 🇵🇱 Warsaw | 1,989 | 1990 |
| 6 | [Accenture Poland](https://www.tamtam.ai/c/accenture-poland) (accenture.com)<br>A global company providing professional services to leading businesses, governments, and NGOs, focusing on digitalization, operational optimization, profitability, and social impact | IT Services and IT Consulting | 🇵🇱 Warsaw | 1,909 | 1993 |
| 7 | [Billennium](https://www.tamtam.ai/c/billennium) (billennium.com)<br>Global technology consulting and outsourcing company offering IT solutions, staff augmentation, managed services, and technology solutions with a focus on AI, cloud, and software development | IT Services and IT Consulting | 🇵🇱 Warsaw | 1,381 | 2003 |
| 8 | [Lingaro](https://www.tamtam.ai/c/lingaro) (lingarogroup.com)<br>Empowers global enterprises to achieve measurable outcomes with data and AI, providing end-to-end solutions from strategy to scalable platforms for actionable insights and automation. | IT Services and IT Consulting | 🇵🇱 Warsaw | 1,361 | 2008 |
| 9 | [Deloitte Poland](https://www.tamtam.ai/c/deloitte-poland) (deloitte.com)<br>Deloitte provides professional advisory services in consulting, audit, tax, legal, risk management, financial advisory, forensic, AML, and compliance, with a global team of specialists | Management Consulting | 🇵🇱 Warsaw | 1,086 |  |
| 10 | [Sollers Consulting](https://www.tamtam.ai/c/sollers-consulting) (sollers.eu)<br>Support financial institutions with business transformations, digital capabilities, and software integration using low-code platforms and global technology partnerships. | IT Services and IT Consulting | 🇵🇱 Warsaw | 940 | 2000 |
| 11 | [CAG](https://www.tamtam.ai/c/cag) (cag.com.pl)<br>Independent investment banking partnership providing high-quality transaction advisory services in Poland and other CEE countries, with €12 billion in completed deals | Investment Banking | 🇵🇱 Warsaw | 779 | 1999 |
| 12 | [BlueSoft](https://www.tamtam.ai/c/bluesoft) (bluesoft.com)<br>Providing comprehensive IT services focusing on business value, quality delivery, team collaboration, and vendor independence since 2002. | Software Development | 🇵🇱 Warsaw | 728 | 2002 |
| 13 | [Britenet](https://www.tamtam.ai/c/britenet) (britenet.eu)<br>A technology firm with over 17 years of outsourcing experience, specializing in software development, cybersecurity, and IT services for various industries worldwide | IT Services and IT Consulting | 🇵🇱 Warsaw | 700 | 2006 |
| 14 | [Growe](https://www.tamtam.ai/c/growe) (growe.com)<br>In the iGaming and Entertainment industries, we develop cutting-edge technology platforms and payment solutions to propel asset growth and unlock opportunities worldwide | Strategic Management Services | 🇵🇱 Warsaw | 519 | 2019 |
| 15 | [EY Polska](https://www.tamtam.ai/c/ey-polska) (ey.com)<br>World leader in professional services offering audit, tax, advisory, and strategic consulting Committed to delivering high-quality services and creating a better working world | Accounting | 🇵🇱 Warsaw | 490 |  |
| 16 | [CRIDO](https://www.tamtam.ai/c/crido) (crido.pl)<br>A comprehensive business support provider specializing in taxes, law, innovation, investments, advisory, digital solutions, financial modeling, and M&A services | Business Consulting and Services | 🇵🇱 Warsaw | 450 | 2005 |
| 17 | [C&F](https://www.tamtam.ai/c/c-and-f) (candf.com)<br>Global team specializing in data management, analytics, digital transformation, and GRC Developing low-code IT solutions while supporting community initiatives | IT Services and IT Consulting | 🇵🇱 Warsaw | 409 | 2001 |
| 18 | [CBRE Poland](https://www.tamtam.ai/c/cbre-poland) (cbre.pl)<br>A global leader in commercial real estate advisory and investment services, offering a wide range of integrated services to diverse clients worldwide | Real Estate | 🇵🇱 Warsaw | 392 | 2000 |
| 19 | [Modsen](https://www.tamtam.ai/c/modsen) (modsen-software.com)<br>Global software development company offering services such as custom software development, team augmentation, business analysis, UI/UX design, and quality assurance testing Specializing in various industries | IT Services and IT Consulting | 🇵🇱 Warsaw | 379 | 2020 |
| 20 | [Axendi](https://www.tamtam.ai/c/axendi) (axendi.com)<br>A leading provider of contact center services with 5 operational centers, 1700 agents, and expertise in multichannel customer service solutions | Outsourcing and Offshoring Consulting | 🇵🇱 Warsaw | 377 | 2009 |
| 21 | [RÖDL Poland](https://www.tamtam.ai/c/rodl-poland) (roedl.pl)<br>A global provider of legal, tax, management and IT consulting services with offices in 50 countries and over 5,800 trusted professionals | Financial Services | 🇵🇱 Warsaw | 358 | 1992 |
| 22 | [Mmd](https://www.tamtam.ai/c/mmd) (mmdcee.com)<br>Leading consultancy specializing in public affairs and corporate communications across Eurasia, Central, Eastern, and South East Europe with extensive industry expertise. | Public Relations and Communications Services | 🇵🇱 Warsaw | 356 | 1985 |
| 23 | [Onwelo](https://www.tamtam.ai/c/onwelo) (onwelo.com)<br>A fast-growing technology firm in Poland providing modern IT solutions for organizations worldwide, with expertise in software development, testing, analytics, and automation | IT Services and IT Consulting | 🇵🇱 Warsaw | 294 | 2015 |
| 24 | [PKF Polska](https://www.tamtam.ai/c/pkf-polska) (pkfpolska.pl)<br>One of the largest audit and consulting networks in the world, with 30 years of experience in Poland Specializing in audit, financial advisory, and more | Business Consulting and Services | 🇵🇱 Warsaw | 277 | 1993 |
| 25 | [Nexio Management](https://www.tamtam.ai/c/nexio-management) (nexio.pl)<br>A software development and consulting firm specializing in providing high-quality IT products and services to clients in various industries | IT Services and IT Consulting | 🇵🇱 Warsaw | 263 | 2006 |
| 26 | [KBJ](https://www.tamtam.ai/c/kbj) (kbj.com.pl)<br>A market leader in SAP services, KBJ provides technology solutions and expertise to help organizations achieve digital transformation and become intelligent enterprises | Software Development | 🇵🇱 Warsaw | 239 | 2005 |
| 27 | [Salestube](https://www.tamtam.ai/c/salestube) (salestube.tech)<br>A leading e-commerce company offering comprehensive solutions, expertise in marketing, logistics, and consulting, with a focus on work-life balance | Advertising Services | 🇵🇱 Warsaw | 199 | 2016 |
| 28 | [Enxoo](https://www.tamtam.ai/c/enxoo) (enxoo.com)<br>It provides cloud solutions and consulting services for digital transformation, focusing on communications and various sectors using Salesforce technology. | IT Services and IT Consulting | 🇵🇱 Warsaw | 194 | 2012 |
| 29 | [deepsense.ai](https://www.tamtam.ai/c/deepsense-ai) (deepsense.ai)<br>AI solutions provider offering AI Guidance and Implementation Services for global clients Specializing in Generative AI, NLP, Computer Vision, Predictive Analytics, MLOps, and Data Engineering | IT Services and IT Consulting | 🇵🇱 Warsaw | 139 | 2014 |
| 30 | [Horus](https://www.tamtam.ai/c/horus-warsaw) (horus.pl)<br>A Polish software house specializing in digitizing business processes for large companies, creating architectures, and providing solutions like RPA They value respect, commitment, and honesty | Software Development | 🇵🇱 Warsaw | 129 | 2005 |

## 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/consulting-firms-warsaw