# 30 leading professional services firms in Warsaw
Tamtam tracks 76 professional services firms headquartered in Warsaw. This list ranks the 30 largest by number of employees on LinkedIn, led by Sii Poland, PwC Polska and KPMG Poland. Their median headcount is 617. Half of them were founded in 2002 or later.
The professional services firms in Warsaw listed here operate predominantly in IT services and consulting, with a significant presence of business consulting and other specialized services. Companies such as Sii Poland and Accenture Poland offer technology consulting, AI-driven digital transformation, and software development. PwC Polska and KPMG Poland provide legal, tax, business, and audit solutions, while AMG Biuro Rachunkowe specializes in financial advice and accounting.
These firms are generally well-established, with many founded in the early 2000s, reflecting a mature professional services market. Examples include Billennium (founded 2003) and Lingaro (founded 2008), both focusing on IT solutions and data. All listed companies are headquartered in Warsaw, indicating a strong concentration of professional services expertise in the Polish capital.
π΅π± Warsaw Β· 30 companies Β· Updated Nov 11, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Sii Poland](https://www.tamtam.ai/c/sii-poland) (sii.pl)
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 | π΅π± Warsaw | 6,243 | 2006 |
| 2 | [PwC Polska](https://www.tamtam.ai/c/pwc-polska) (pwc.pl)
Providing legal, tax, business, and audit solutions to diverse clients across sectors, supporting both large corporations and local enterprises. | Business Consulting and Services | π΅π± Warsaw | 4,370 | |
| 3 | [KPMG Poland](https://www.tamtam.ai/c/kpmg-poland) (kpmg.com)
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 | π΅π± Warsaw | 1,989 | 1990 |
| 4 | [Accenture Poland](https://www.tamtam.ai/c/accenture-poland) (accenture.com)
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 | π΅π± Warsaw | 1,909 | 1993 |
| 5 | [Billennium](https://www.tamtam.ai/c/billennium) (billennium.com)
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 | π΅π± Warsaw | 1,381 | 2003 |
| 6 | [Lingaro](https://www.tamtam.ai/c/lingaro) (lingarogroup.com)
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 | π΅π± Warsaw | 1,361 | 2008 |
| 7 | [AMG Biuro Rachunkowe](https://www.tamtam.ai/c/amg-biuro-rachunkowe) (amgbiuro.pl)
A family business with extensive experience since 1994, offering financial advice, HR and payroll management, and accounting solutions for a range of clients | Accounting | π΅π± Warsaw | 1,330 | 1994 |
| 8 | [Deloitte Poland](https://www.tamtam.ai/c/deloitte-poland) (deloitte.com)
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 | π΅π± Warsaw | 1,086 | |
| 9 | [Sollers Consulting](https://www.tamtam.ai/c/sollers-consulting) (sollers.eu)
Support financial institutions with business transformations, digital capabilities, and software integration using low-code platforms and global technology partnerships. | IT Services and IT Consulting | π΅π± Warsaw | 940 | 2000 |
| 10 | [CAG](https://www.tamtam.ai/c/cag) (cag.com.pl)
Independent investment banking partnership providing high-quality transaction advisory services in Poland and other CEE countries, with β¬12 billion in completed deals | Investment Banking | π΅π± Warsaw | 779 | 1999 |
| 11 | [BlueSoft](https://www.tamtam.ai/c/bluesoft) (bluesoft.com)
Providing comprehensive IT services focusing on business value, quality delivery, team collaboration, and vendor independence since 2002. | Software Development | π΅π± Warsaw | 728 | 2002 |
| 12 | [Britenet](https://www.tamtam.ai/c/britenet) (britenet.eu)
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 | π΅π± Warsaw | 700 | 2006 |
| 13 | [Lionbridge Poland](https://www.tamtam.ai/c/lionbridge-poland) (lionbridge.com)
A leading provider of translation, digital marketing, content management, and application testing solutions, specializing in global brand consistency and local market adaptation | Translation and Localization | π΅π± Warsaw | 669 | 1990 |
| 14 | [EWL Group](https://www.tamtam.ai/c/ewl-group) (ewl.com.pl)
Leading Polish recruitment agency offering comprehensive services for hiring workers from Eastern Europe and Asia, as well as professional employment solutions for various sectors | Staffing and Recruiting | π΅π± Warsaw | 632 | 2007 |
| 15 | [Connectis_](https://www.tamtam.ai/c/connectis) (connectis.pl)
We develop developers and prepare them for the future, providing dedicated IT teams and specialists to clients efficiently and remotely | IT Services and IT Consulting | π΅π± Warsaw | 617 | 2003 |
| 16 | [UrzΔ
d Dozoru Technicznego](https://www.tamtam.ai/c/urzad-dozoru-technicznego) (udt.gov.pl)
A Polish institution ensuring safe operation of technical devices through technical supervision, certification, training, and research laboratory services with specialized staff | Public Safety | π΅π± Warsaw | 603 | 1911 |
| 17 | [Randstad Polska](https://www.tamtam.ai/c/randstad-polska) (randstad.pl)
A global leader in HR consulting and temporary staffing, supporting individuals in finding the right jobs and businesses in hiring top talent, while staying up-to-date with market trends | Staffing and Recruiting | π΅π± Warsaw | 559 | 1994 |
| 18 | [Growe](https://www.tamtam.ai/c/growe) (growe.com)
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 | π΅π± Warsaw | 519 | 2019 |
| 19 | [Transition Technologies MS](https://www.tamtam.ai/c/transition-technologies-ms) (ttms.com)
Global IT services provider offering end-to-end solutions with expertise in niche technologies, staffed by over 800 specialists across multiple continents | IT Services and IT Consulting | π΅π± Warsaw | 515 | 2015 |
| 20 | [EY Polska](https://www.tamtam.ai/c/ey-polska) (ey.com)
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 | π΅π± Warsaw | 490 | |
| 21 | [HRK S.A.](https://www.tamtam.ai/c/hrk-s-a) (hrk.pl)
Specializing in HR consulting, recruitment, assessment centers, and payroll services with expertise in various industries, offering global executive search solutions | Staffing and Recruiting | π΅π± Warsaw | 455 | 2000 |
| 22 | [SoftTeco](https://www.tamtam.ai/c/softteco) (softteco.com)
A software development company offering custom services globally, with a highly professional team completing over 300 projects across various industries | IT Services and IT Consulting | π΅π± Warsaw | 454 | 2008 |
| 23 | [CRIDO](https://www.tamtam.ai/c/crido) (crido.pl)
A comprehensive business support provider specializing in taxes, law, innovation, investments, advisory, digital solutions, financial modeling, and M&A services | Business Consulting and Services | π΅π± Warsaw | 450 | 2005 |
| 24 | [MS Services](https://www.tamtam.ai/c/ms-services) (msservices.pl)
Leading provider of outsourcing services in Poland specializing in efficient solutions supporting sales projects, with a focus on sales outsourcing, merchandising, and sales promotion | Outsourcing and Offshoring Consulting | π΅π± Warsaw | 435 | 2003 |
| 25 | [C&F](https://www.tamtam.ai/c/c-and-f) (candf.com)
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 | π΅π± Warsaw | 409 | 2001 |
| 26 | [CBRE Poland](https://www.tamtam.ai/c/cbre-poland) (cbre.pl)
A global leader in commercial real estate advisory and investment services, offering a wide range of integrated services to diverse clients worldwide | Real Estate | π΅π± Warsaw | 392 | 2000 |
| 27 | [Modsen](https://www.tamtam.ai/c/modsen) (modsen-software.com)
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 | π΅π± Warsaw | 379 | 2020 |
| 28 | [Fundacja Rozwoju PrzedsiΔbiorczoΕci TwΓ³j StartUP](https://www.tamtam.ai/c/fundacja-rozwoju-przedsiebiorczosci-twoj-startup) (twojstartup.pl)
A team of professionals helps individuals start successful businesses by providing support, low-cost implementation, and guidance towards success | Strategic Management Services | π΅π± Warsaw | 358 | 2012 |
| 29 | [RΓDL Poland](https://www.tamtam.ai/c/rodl-poland) (roedl.pl)
A global provider of legal, tax, management and IT consulting services with offices in 50 countries and over 5,800 trusted professionals | Financial Services | π΅π± Warsaw | 358 | 1992 |
| 30 | [Mmd](https://www.tamtam.ai/c/mmd) (mmdcee.com)
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 | π΅π± Warsaw | 356 | 1985 |
## 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.
## More company lists in Warsaw
- [The largest companies in Warsaw](https://www.tamtam.ai/l/largest-companies-warsaw) (872)
- [Multinational companies in Warsaw](https://www.tamtam.ai/l/multinational-companies-warsaw) (222)
- [IT services companies in Warsaw](https://www.tamtam.ai/l/it-services-companies-warsaw) (108)
- [Critical infrastructure operators in Warsaw](https://www.tamtam.ai/l/critical-infrastructure-operators-warsaw) (92)
- [Software Development companies in Warsaw](https://www.tamtam.ai/l/software-development-companies-warsaw) (88)
- [Financial services firms in Warsaw](https://www.tamtam.ai/l/financial-services-firms-warsaw) (87)
- [IT Services and IT Consulting companies in Warsaw](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-warsaw) (84)
- [Companies with a mobile app in Warsaw](https://www.tamtam.ai/l/companies-with-mobile-app-warsaw) (72)
- [Companies with in-house R&D in Warsaw](https://www.tamtam.ai/l/r-and-d-companies-warsaw) (69)
- [Retail chains in Warsaw](https://www.tamtam.ai/l/retail-chains-warsaw) (67)
- [Public sector organisations in Warsaw](https://www.tamtam.ai/l/public-sector-organisations-warsaw) (61)
- [Financial Services companies in Warsaw](https://www.tamtam.ai/l/financial-services-companies-warsaw) (59)
- [Manufacturers in Warsaw](https://www.tamtam.ai/l/manufacturers-warsaw) (53)
- [Corporate groups and holding companies in Warsaw](https://www.tamtam.ai/l/holding-companies-warsaw) (49)
- [SaaS companies in Warsaw](https://www.tamtam.ai/l/saas-companies-warsaw) (49)
- [Consulting firms in Warsaw](https://www.tamtam.ai/l/consulting-firms-warsaw) (43)
- [Publicly traded companies in Warsaw](https://www.tamtam.ai/l/publicly-traded-companies-warsaw) (39)
- [Education providers in Warsaw](https://www.tamtam.ai/l/education-companies-warsaw) (38)
- [Subscription businesses in Warsaw](https://www.tamtam.ai/l/subscription-businesses-warsaw) (33)
- [Hardware manufacturers in Warsaw](https://www.tamtam.ai/l/hardware-companies-warsaw) (31)
- [AI companies in Warsaw](https://www.tamtam.ai/l/ai-companies-warsaw) (29)
- [Transportation, Logistics, Supply Chain and Storage companies in Warsaw](https://www.tamtam.ai/l/transportation-logistics-supply-chain-and-storage-companies-warsaw) (29)
- [Consumer goods companies in Warsaw](https://www.tamtam.ai/l/consumer-goods-companies-warsaw) (27)
- [E-commerce companies in Warsaw](https://www.tamtam.ai/l/ecommerce-companies-warsaw) (26)
## The same list elsewhere in Poland
- [Professional services firms in Poland](https://www.tamtam.ai/l/professional-services-firms-poland) (149)
- [Professional services firms in Masovia](https://www.tamtam.ai/l/professional-services-firms-masovia) (76)
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Source: https://www.tamtam.ai/l/professional-services-firms-warsaw