# Top 30 professional services firms in Vienna Tamtam tracks 35 professional services firms headquartered in Vienna. This list ranks the 30 largest by number of employees on LinkedIn, led by Talentor International, KPMG Austria and PwC Austria. Their median headcount is 341. Half of them were founded in 1995 or later. The professional services firms in Vienna listed here are mid-sized to large organizations, predominantly in financial services, law, and IT consulting. Companies such as KPMG Austria and PwC Austria provide audit, tax, and advisory services, while Wolf Theiss and Schoenherr Attorneys at Law specialize in legal services. RISE and EBCONT are notable for their IT services and consulting expertise. The companies on this list are generally well-established, with many founded before the year 2000. There is a strong concentration of firms offering financial services and legal counsel, indicating a robust demand for these professional specializations in Vienna. Beyond these core areas, there are also significant players in executive search like Talentor International and IT consulting such as CNT Management Consulting, reflecting a diverse yet mature professional services landscape. πŸ‡¦πŸ‡Ή Vienna Β· 30 companies Β· Updated Nov 11, 2026 | # | Company | Industry | Headquarters | Employees | Founded | |---|---|---|---|---|---| | 1 | [Talentor International](https://www.tamtam.ai/c/talentor-international) (talentor.com)
International executive search firm connecting businesses with top leadership talent globally, leveraging a network of experienced consultants across various industries and regions | Executive Search Services | πŸ‡¦πŸ‡Ή Vienna | 2,091 | 2003 | | 2 | [KPMG Austria](https://www.tamtam.ai/c/kpmg-austria) (kpmg.com)
Largest Austrian audit and consulting firm with over 2,050 employees, strong regional presence, and global project capabilities. | Business Consulting and Services | πŸ‡¦πŸ‡Ή Vienna | 1,226 | 1946 | | 3 | [PwC Austria](https://www.tamtam.ai/c/pwc-austria) (pwc.at)
A global professional services network with offices in 157 countries, offering assurance, tax, and advisory services to organizations and individuals | Financial Services | πŸ‡¦πŸ‡Ή Vienna | 1,075 | 1924 | | 4 | [TPA Group](https://www.tamtam.ai/c/tpa-group) (tpa-group.com)
A leading tax advisory and auditing services company in Central and South Eastern Europe, with over 1,700 staff across 12 countries | Financial Services | πŸ‡¦πŸ‡Ή Vienna | 861 | 1979 | | 5 | [Wolf Theiss](https://www.tamtam.ai/c/wolf-theiss) (wolftheiss.com)
A leading law firm in CEE/SEE region with over 360 lawyers offering services in various legal fields to international clients | Law Practice | πŸ‡¦πŸ‡Ή Vienna | 758 | 1957 | | 6 | [Schoenherr Attorneys at Law](https://www.tamtam.ai/c/schoenherr-attorneys-at-law) (schoenherr.eu)
Leading full-service law firm with a strong presence in Central and Eastern Europe, offering high-end legal services to international clients | Law Practice | πŸ‡¦πŸ‡Ή Vienna | 716 | 1950 | | 7 | [BDO Austria](https://www.tamtam.ai/c/bdo-austria) (bdo.at)
The company offers audit, tax consulting, and corporate finance services. They also provide comprehensive consulting in areas like restructuring, digital services, and people and organization strategies. | Financial Services | πŸ‡¦πŸ‡Ή Vienna | 700 | 1962 | | 8 | [RISE - Research Industrial Systems Engineering](https://www.tamtam.ai/c/rise-research-industrial-systems-engineering) (rise-world.com)
Internationally recognized IT R&D provider offering consultancy, research & development in information technology, specializing in critical environments and large-scale projects | IT Services and IT Consulting | πŸ‡¦πŸ‡Ή Vienna | 516 | | | 9 | [CNT Management Consulting](https://www.tamtam.ai/c/cnt-management-consulting) (cnt-online.com)
CNT Management Consulting is a leading firm specializing in SAP solutions with 450+ consultants across multiple locations, offering expertise in integration, customization, and implementation strategies | IT Services and IT Consulting | πŸ‡¦πŸ‡Ή Vienna | 495 | 1999 | | 10 | [ISG International Service Group](https://www.tamtam.ai/c/isg-international-service-group) (isg.com)
Provides full-service HR solutions including executive search, personnel development, employer branding, outplacement, interim management, and temporary staffing across Europe. | Staffing and Recruiting | πŸ‡¦πŸ‡Ή Vienna | 488 | 1999 | | 11 | [Deloitte Γ–sterreich](https://www.tamtam.ai/c/deloitte-osterreich) (deloitte.at)
Leading professional services firm in Austria offering audit, tax, consulting, financial advisory, risk advisory, legal, and digital services with a focus on positive business development | Management Consulting | πŸ‡¦πŸ‡Ή Vienna | 467 | | | 12 | [EBCONT](https://www.tamtam.ai/c/ebcont) (ebcont.com)
An Austrian IT services company with over 650 employees providing IT solutions for 130+ customers, including AI and Data Science specialists | IT Services and IT Consulting | πŸ‡¦πŸ‡Ή Vienna | 421 | 2001 | | 13 | [Γ–SB Gruppe](https://www.tamtam.ai/c/osb-gruppe) (oesb-gruppe.com)
The company develops innovative concepts, pilot projects, counseling programs, and services in response to changing societal and economic challenges | Business Consulting and Services | πŸ‡¦πŸ‡Ή Vienna | 393 | | | 14 | [4Service Group](https://www.tamtam.ai/c/4service-group) (4service.company)
International research Customer Experience company specializing in Mystery Shopping Helps companies improve service quality with extensive network and dedicated professionals | Market Research | πŸ‡¦πŸ‡Ή Vienna | 356 | 2001 | | 15 | [EFS Consulting](https://www.tamtam.ai/c/efs-consulting) (efs.consulting)
Automotive consulting firm specializing in product, market, and production strategies, offering innovative solutions and global services with interdisciplinary expertise | Business Consulting and Services | πŸ‡¦πŸ‡Ή Vienna | 341 | 1992 | | 16 | [TPA Austria](https://www.tamtam.ai/c/tpa-austria) (tpa-group.at)
A leading tax advisory and auditing services company with offices in Austria and Central/South Eastern Europe, employing approximately 1,000 individuals in eleven countries | Financial Services | πŸ‡¦πŸ‡Ή Vienna | 318 | 1979 | | 17 | [FCP Fritsch, Chiari & Partner ZT GmbH](https://www.tamtam.ai/c/fcp-fritsch-chiari-and-partner-zt-gmbh) (fcp.at)
An engineering office with headquarters in Vienna and international presence, offering services with a team of over 350 staff members | Civil Engineering | πŸ‡¦πŸ‡Ή Vienna | 278 | 1960 | | 18 | [NAVAX](https://www.tamtam.ai/c/navax) (navax.com)
This company optimizes business processes by analyzing, streamlining, and implementing them in IT, offering solutions such as ERP, CRM, collaboration, and more | IT Services and IT Consulting | πŸ‡¦πŸ‡Ή Vienna | 190 | 1995 | | 19 | [Grant Thornton Austria](https://www.tamtam.ai/c/grant-thornton-austria) (grantthornton.at)
A leading company in Austria providing auditing, tax consulting, outsourcing, advisory services, with a focus on forensics, cyber security, and compliance technology | Business Consulting and Services | πŸ‡¦πŸ‡Ή Vienna | 187 | | | 20 | [CMS Reich-Rohrwig Hainz](https://www.tamtam.ai/c/cms-reich-rohrwig-hainz) (cms.law)
A global firm with 4,500 experts providing legal and tax advice, focusing on long-term partnerships to help organizations succeed in changing times | Legal Services | πŸ‡¦πŸ‡Ή Vienna | 125 | 1970 | | 21 | [Snap Consulting GmbH](https://www.tamtam.ai/c/snap-consulting-gmbh) (snapconsult.com)
Specialists in implementing SAP Logistics, Healthcare, and Technology solutions to meet business requirements with expertise and precision | Software Development | πŸ‡¦πŸ‡Ή Vienna | 93 | 2000 | | 22 | [RSM Austria](https://www.tamtam.ai/c/rsm-austria) (rsm.global)
An international network of audit, tax, and consulting experts providing a wide range of services, including risk management, restructuring, and financial solutions | Financial Services | πŸ‡¦πŸ‡Ή Vienna | 66 | 1967 | | 23 | [Alltech International, Inc.](https://www.tamtam.ai/c/alltech-international-inc) (alltech.net)
An award-winning IT services provider in the Washington DC area, specializing in Federal Government support and integration services nationwide since 1994 | IT Services and IT Consulting | πŸ‡¦πŸ‡Ή Vienna | 50 | 1994 | | 24 | [Steuer & Service Steuerberatungs GmbH](https://www.tamtam.ai/c/steuer-and-service-steuerberatungs-gmbh) (steuerundservice.at)
A proactive consultancy firm providing expert services in tax, finance, payroll, and HR, with a focus on personalized advice, high competence, clear communication, and quick responsiveness | Accounting | πŸ‡¦πŸ‡Ή Vienna | 43 | 2002 | | 25 | [PwC Legal Austria](https://www.tamtam.ai/c/pwc-legal-austria) (pwclegal.at)
Global professional services leader with a legal network of over 3,700 professionals in 95 countries providing business and legal solutions worldwide | Legal Services | πŸ‡¦πŸ‡Ή Vienna | 35 | 2016 | | 26 | [Risk Experts Risiko Engineering GmbH](https://www.tamtam.ai/c/risk-experts-risiko-engineering-gmbh) (riskexperts.at)
Specialized consulting firm helping businesses identify and mitigate risks through expert analysis, offering comprehensive solutions and services for effective risk management and damage prevention | Business Consulting and Services | πŸ‡¦πŸ‡Ή Vienna | 30 | 2005 | | 27 | [Venionaire Capital AG](https://www.tamtam.ai/c/venionaire-capital-ag) (venionaire.com)
Ventionaire Capital specializes in venture capital and private equity, advising startups, making early-stage investments, and managing a portfolio with a focus on tech-related sectors | Financial Services | πŸ‡¦πŸ‡Ή Vienna | 24 | 2012 | | 28 | [FALCON \| Tax \| Audit \| Advisory \| virtual Services](https://www.tamtam.ai/c/falcon-tax-audit-advisory-virtual-services) (fal-con.eu)
Provider of tax, accounting, payroll, financial advisory, and audit services with a focus on personal commitment, integration, communication, and integrity | Law Practice | πŸ‡¦πŸ‡Ή Vienna | 23 | 2002 | | 29 | [CQ Investment Group](https://www.tamtam.ai/c/cq-investment-group) (c-quadrat.com)
Specializes in quantitative and discretionary absolute and total return strategies aiming for sustainable growth for institutional and private investors. | Financial Services | πŸ‡¦πŸ‡Ή Vienna | 19 | 1991 | | 30 | [Finnoconsult](https://www.tamtam.ai/c/finnoconsult) (finnoconsult.at)
An innovation consultancy specializing in digital solutions for financial and insurance companies, offering end-to-end implementation, user-centric design, and a digital competence comparison tool | Business Consulting and Services | πŸ‡¦πŸ‡Ή Vienna | 17 | 2015 | ## 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 Vienna - [The largest companies in Vienna](https://www.tamtam.ai/l/largest-companies-vienna) (580) - [Multinational companies in Vienna](https://www.tamtam.ai/l/multinational-companies-vienna) (228) - [Critical infrastructure operators in Vienna](https://www.tamtam.ai/l/critical-infrastructure-operators-vienna) (73) - [Financial services firms in Vienna](https://www.tamtam.ai/l/financial-services-firms-vienna) (71) - [IT Services and IT Consulting companies in Vienna](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-vienna) (61) - [Companies with in-house R&D in Vienna](https://www.tamtam.ai/l/r-and-d-companies-vienna) (60) - [SaaS companies in Vienna](https://www.tamtam.ai/l/saas-companies-vienna) (51) - [Software Development companies in Vienna](https://www.tamtam.ai/l/software-development-companies-vienna) (49) - [Companies with a mobile app in Vienna](https://www.tamtam.ai/l/companies-with-mobile-app-vienna) (48) - [Public sector organisations in Vienna](https://www.tamtam.ai/l/public-sector-organisations-vienna) (48) - [Manufacturers in Vienna](https://www.tamtam.ai/l/manufacturers-vienna) (48) - [Financial Services companies in Vienna](https://www.tamtam.ai/l/financial-services-companies-vienna) (47) - [Corporate groups and holding companies in Vienna](https://www.tamtam.ai/l/holding-companies-vienna) (47) - [Retail chains in Vienna](https://www.tamtam.ai/l/retail-chains-vienna) (41) - [IT services companies in Vienna](https://www.tamtam.ai/l/it-services-companies-vienna) (37) - [Education providers in Vienna](https://www.tamtam.ai/l/education-companies-vienna) (36) - [Publicly traded companies in Vienna](https://www.tamtam.ai/l/publicly-traded-companies-vienna) (29) - [Hardware manufacturers in Vienna](https://www.tamtam.ai/l/hardware-companies-vienna) (27) - [Consulting firms in Vienna](https://www.tamtam.ai/l/consulting-firms-vienna) (25) - [Banking companies in Vienna](https://www.tamtam.ai/l/banking-companies-vienna) (25) ## The same list elsewhere in Austria - [Professional services firms in Austria](https://www.tamtam.ai/l/professional-services-firms-austria) (58) --- Source: https://www.tamtam.ai/l/professional-services-firms-vienna