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.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Sii Polandsii.pl
Provides technology consulting, AI-driven digital transformation, engineering, and business services, supporting clients in testing, software development, infrastructure management, and system integration. |
6,243 | |||
| 2 |
PwC Polskapwc.pl
Providing legal, tax, business, and audit solutions to diverse clients across sectors, supporting both large corporations and local enterprises. |
4,370 | |||
| 3 |
Andersen Labandersenlab.com
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. |
3,703 | |||
| 4 |
Innowiseinnowise.com
International software development company delivering advanced digital solutions using AI, Big Data, IoT, Blockchain, and AR/VR technologies worldwide. |
2,118 | |||
| 5 |
KPMG Polandkpmg.com
Global organization providing professional services in audit, tax, finance, legal, and consulting Improving business results, managing risks, creating strategies, and adding value |
1,989 | |||
| 6 |
Accenture Polandaccenture.com
A global company providing professional services to leading businesses, governments, and NGOs, focusing on digitalization, operational optimization, profitability, and social impact |
1,909 | |||
| 7 |
Billenniumbillennium.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 |
1,381 | |||
| 8 |
Lingarolingarogroup.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. |
1,361 | |||
| 9 |
Deloitte Polanddeloitte.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 |
1,086 | |||
| 10 |
Sollers Consultingsollers.eu
Support financial institutions with business transformations, digital capabilities, and software integration using low-code platforms and global technology partnerships. |
940 | |||
| 11 |
CAGcag.com.pl
Independent investment banking partnership providing high-quality transaction advisory services in Poland and other CEE countries, with €12 billion in completed deals |
779 | |||
| 12 |
BlueSoftbluesoft.com
Providing comprehensive IT services focusing on business value, quality delivery, team collaboration, and vendor independence since 2002. |
728 | |||
| 13 |
Britenetbritenet.eu
A technology firm with over 17 years of outsourcing experience, specializing in software development, cybersecurity, and IT services for various industries worldwide |
700 | |||
| 14 | 519 | ||||
| 15 | 490 | ||||
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 | 450 | ||||
| 17 | 409 | ||||
| 18 |
CBRE Polandcbre.pl
A global leader in commercial real estate advisory and investment services, offering a wide range of integrated services to diverse clients worldwide |
392 | |||
| 19 |
Modsenmodsen-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 |
379 | |||
| 20 |
Axendiaxendi.com
A leading provider of contact center services with 5 operational centers, 1700 agents, and expertise in multichannel customer service solutions |
377 | |||
| 21 |
RÖDL Polandroedl.pl
A global provider of legal, tax, management and IT consulting services with offices in 50 countries and over 5,800 trusted professionals |
358 | |||
| 22 |
Mmdmmdcee.com
Leading consultancy specializing in public affairs and corporate communications across Eurasia, Central, Eastern, and South East Europe with extensive industry expertise. |
356 | |||
| 23 |
Onweloonwelo.com
A fast-growing technology firm in Poland providing modern IT solutions for organizations worldwide, with expertise in software development, testing, analytics, and automation |
294 | |||
| 24 |
PKF Polskapkfpolska.pl
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 |
277 | |||
| 25 |
Nexio Managementnexio.pl
A software development and consulting firm specializing in providing high-quality IT products and services to clients in various industries |
263 | |||
| 26 |
KBJkbj.com.pl
A market leader in SAP services, KBJ provides technology solutions and expertise to help organizations achieve digital transformation and become intelligent enterprises |
239 | |||
| 27 |
Salestubesalestube.tech
A leading e-commerce company offering comprehensive solutions, expertise in marketing, logistics, and consulting, with a focus on work-life balance |
199 | |||
| 28 | 194 | ||||
| 29 |
deepsense.aideepsense.ai
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 |
139 | |||
| 30 | 129 | ||||
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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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