# Top 50 IT services companies in Turkey

Tamtam tracks 99 IT services companies headquartered in Turkey. This list ranks the 50 largest by number of employees on LinkedIn, led by Turkcell Global Bilgi, HAVELSAN and Garanti BBVA Teknoloji. Their median headcount is 628. Half of them were founded in 2004 or later. The most common headquarters are Istanbul (24) and Ankara (3).

This selection of IT services companies in Turkey includes large firms with thousands of employees. Turkcell Global Bilgi provides customer experience solutions, while HAVELSAN specializes in defense and information technology software. Garanti BBVA Teknoloji offers IT infrastructure and software development for financial organizations, and Turkish Technology focuses on aviation industry solutions. NTT DATA Business Solutions Turkey provides digital transformation services, and Innova is a Turkish IT solutions provider.

The companies on this list are predominantly focused on IT services and consulting, with a significant number catering to the financial and banking sectors. Several firms also specialize in telecommunications, defense, and aviation.

🇹🇷 Turkey · 50 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Turkcell Global Bilgi](https://www.tamtam.ai/c/turkcell-global-bilgi) (globalbilgi.com.tr)<br>A leading provider of customer experience solutions across various sectors with expertise in customer service, sales, technical support, and data management | Telecommunications | 🇹🇷 Beyoglu | 7,535 | 1999 |
| 2 | [HAVELSAN](https://www.tamtam.ai/c/havelsan) (havelsan.com)<br>Defense and information technology software integrator specializing in command systems, war management, simulation, autonomous platforms, cyber security, homeland security and e-government technologies. | Defense and Space Manufacturing | 🇹🇷 Çankaya | 3,634 | 1982 |
| 3 | [Garanti BBVA Teknoloji](https://www.tamtam.ai/c/garanti-bbva-teknoloji) (garantibbvateknoloji.com.tr)<br>Provides technology infrastructure, software development, system management, security, and project management services for financial organizations with real-time operations. | IT Services and IT Consulting | 🇹🇷 Pendik | 3,451 |  |
| 4 | [Turkish Technology](https://www.tamtam.ai/c/turkish-technology) (turkishtechnology.com)<br>An innovative and agile technology organization in the aviation industry, focused on driving customer experience through cutting-edge solutions and services | IT Services and IT Consulting | 🇹🇷 Üsküdar | 2,586 | 2021 |
| 5 | [Softtech](https://www.tamtam.ai/c/softtech) (softtech.com.tr)<br>A technology innovator with a focus on creating products that enhance quality of life, fostering in-house entrepreneurship, and supporting startups | IT Services and IT Consulting | 🇹🇷 Istanbul | 2,375 | 2006 |
| 6 | [NTT DATA Business Solutions Turkey](https://www.tamtam.ai/c/ntt-data-business-solutions-turkey) (nttdata-solutions.com)<br>NTT DATA Business Solutions provides technology services worldwide, specializing in digital transformation, innovation, and developing solutions in collaboration with industry leaders | IT Services and IT Consulting | 🇹🇷 Ataşehir | 2,227 |  |
| 7 | [Innova](https://www.tamtam.ai/c/innova-istanbul) (innova.com.tr)<br>Leading Turkish IT solutions provider with 1400 professionals offering platform-independent solutions in various sectors, exporting solutions to 33 countries across 3 continents | IT Services and IT Consulting | 🇹🇷 Istanbul | 2,115 | 1999 |
| 8 | [Architecht](https://www.tamtam.ai/c/architecht) (architecht.com)<br>Specializing in financial technologies, our subsidiary of a leading participation bank offers innovative solutions for banking, security, and software development globally | IT Services and IT Consulting | 🇹🇷 Teknopark İstanbul | 2,012 | 2015 |
| 9 | [Intertech Information Technology and Marketing Inc.](https://www.tamtam.ai/c/intertech-information-technology-and-marketing-inc) (intertech.com.tr)<br>Established in 1987, this tech company provides innovative IT solutions for finance and banking industries globally, offering a wide range of products and services | IT Services and IT Consulting | 🇹🇷 Istanbul | 1,895 | 1987 |
| 10 | [Ziraat Teknoloji](https://www.tamtam.ai/c/ziraat-teknoloji) (ziraatteknoloji.com)<br>One of Turkey's leading IT companies providing banking solutions and IT services to public organizations and companies worldwide | IT Services and IT Consulting | 🇹🇷 Esenler | 1,809 | 2001 |
| 11 | [Türksat Uydu Haberleşme Kablo TV ve İşletme A.Ş.](https://www.tamtam.ai/c/turksat-uydu-haberlesme-kablo-tv-ve-isletme-a-s) (turksat.com.tr)<br>A leading satellite operator offering services in satellite communications, cable broadcasting, and IT fields in Turkey and worldwide | Telecommunications | 🇹🇷 Ankara | 1,706 | 2004 |
| 12 | [Etiya](https://www.tamtam.ai/c/etiya) (etiya.com)<br>Etiya specializes in AI-driven digital transformation, offering innovative solutions for various sectors, enhancing customer experience with agile methodologies and microservices. | Software Development | 🇹🇷 Istanbul | 1,570 | 2004 |
| 13 | [KoçSistem](https://www.tamtam.ai/c/kocsistem) (kocsistem.com.tr)<br>Leader in information technologies offering diverse services in IoT, analytics, cloud, security, and more, focusing on client needs and digital transformation | IT Services and IT Consulting | 🇹🇷 Istanbul | 1,554 | 1945 |
| 14 | [CCN Holding](https://www.tamtam.ai/c/ccn-holding) (ccnholding.com)<br>A construction company established through a partnership, known for prestigious projects in Azerbaijan and Turkey, including healthcare and tourism facilities Operations in Azerbaijan, Turkey, K Iraq, Libya | Holding Companies | 🇹🇷 | 1,357 | 2007 |
| 15 | [IBTECH A.S.](https://www.tamtam.ai/c/ibtech-a-s) (ibtech.com.tr)<br>Development and continuous enhancement of modular core banking software, direct banking platforms, CRM, BI, and infrastructure management solutions for financial institutions. | IT Services and IT Consulting | 🇹🇷 Gebze | 1,313 | 2005 |
| 16 | [BGTS](https://www.tamtam.ai/c/bgts) (bilgeadam.com)<br>An international technology consulting firm specializing in software development, IT consulting, business processes, QA & testing, big data, cloud, AI/ML, and cybersecurity services | IT Services and IT Consulting | 🇹🇷 Istanbul | 1,182 | 1997 |
| 17 | [NETAŞ](https://www.tamtam.ai/c/netas) (netas.com.tr)<br>Develops end-to-end IT infrastructure and telecom technologies including cloud computing, 5G equipment, cybersecurity, and smart mobile devices for diverse sectors. | Telecommunications | 🇹🇷 Istanbul | 1,008 | 1967 |
| 18 | [Tempo BPO](https://www.tamtam.ai/c/tempo-bpo) (tempobpo.com)<br>A company specializing in customer and information technology services, offering integrated customer experience, technology operations, and end-to-end digital transformation services | Outsourcing and Offshoring Consulting | 🇹🇷 Istanbul | 1,006 | 2002 |
| 19 | [Deloitte Turkey](https://www.tamtam.ai/c/deloitte-turkey) (deloitte.com.tr)<br>The company provides audit, consulting, financial advisory, risk management, tax services to public and private clients across various industries globally | Management Consulting | 🇹🇷 Istanbul | 978 |  |
| 20 | [OBSS](https://www.tamtam.ai/c/obss) (obss.tech)<br>Leader in technology consulting for a cloud-powered future, with expertise in banking, insurance, e-commerce, retail, and start-ups Strong team with offices in Europe | IT Services and IT Consulting | 🇹🇷 Istanbul | 870 | 2005 |
| 21 | [DIP](https://www.tamtam.ai/c/dip) (dip.com)<br>Specializing in Data & Analytics solutions, creating custom solutions for organizations, providing consulting services in data transformation, analysis, and management processes | IT Services and IT Consulting | 🇹🇷 Istanbul | 702 | 2012 |
| 22 | [BİTES - Defence & Aerospace Technologies](https://www.tamtam.ai/c/bites-defence-and-aerospace-technologies) (bites.com.tr)<br>National high-tech defense industry and information technologies firm developing next-generation solutions for various industries with a focus on cutting-edge technologies and innovative products | Defense and Space Manufacturing | 🇹🇷 Çankaya | 683 | 2005 |
| 23 | [Doğuş Teknoloji](https://www.tamtam.ai/c/dogus-teknoloji) (d-teknoloji.com.tr)<br>A technology company providing customized solutions in various sectors, specializing in RPA, data analytics, AI, cybersecurity, and sustainable practices with a focus on innovation and talent development | IT Services and IT Consulting | 🇹🇷 Maslak | 667 | 2012 |
| 24 | [Reklam Ajansı](https://www.tamtam.ai/c/reklam-ajans) (fikirgen.com)<br>Specializing in digital solutions, the agency provides innovative advertising services tailored to meet the unique needs of its clients | Advertising Services | 🇹🇷 Levent | 638 |  |
| 25 | [adesso Turkey](https://www.tamtam.ai/c/adesso-turkey) (adesso.com.tr)<br>A digital transformation company with agile beliefs, employing over 10,000 people worldwide, offering custom software development and IT solutions | IT Services and IT Consulting | 🇹🇷 Istanbul | 628 | 2013 |
| 26 | [AselsanNET Ltd.](https://www.tamtam.ai/c/aselsannet-ltd) (aselsannet.com.tr)<br>providing sales, survey, installation, system setup, and service activities for electronic and communication needs of civilian institutions and users | Telecommunications | 🇹🇷 Ankara | 614 | 2004 |
| 27 | [ATP](https://www.tamtam.ai/c/atp) (atptech.com)<br>A global IT solutions provider specializing in trading software, restaurant management, digital transformation, sustainable energy products, venture capital, and technology investments | Software Development | 🇹🇷 Istanbul | 580 | 1997 |
| 28 | [TÜBİTAK BİLGEM](https://www.tamtam.ai/c/tubitak-bilgem-izmit) (gov.tr)<br>Advanced research center specializing in informatics and information security, dedicated to enhancing knowledge and innovation in the field | Defense and Space Manufacturing | 🇹🇷 Kocaeli | 554 |  |
| 29 | [Mikrolink](https://www.tamtam.ai/c/mikrolink) (mikrolink.com.tr)<br>A global telecom system integrator and supplier offering end-to-end Data Centre solutions, IT Digital Technologies, telecom projects, and fiber optic connectivity components | Telecommunications | 🇹🇷 Istanbul | 553 | 2000 |
| 30 | [Commencis](https://www.tamtam.ai/c/commencis) (commencis.com)<br>A company specializing in experience design, software engineering, and cloud technologies, enabling enterprises to build digital experiences and strengthen customer relationships globally | Software Development | 🇹🇷 Istanbul | 542 | 2000 |
| 31 | [BDH - Bilisim Destek Hizmetleri](https://www.tamtam.ai/c/bdh-bilisim-destek-hizmetleri) (bdh.com.tr)<br>Leading system integrator in Turkey, offering consulting, managed services, and hardware support in information and communication technologies to all industries and organizations | IT Services and IT Consulting | 🇹🇷 Istanbul | 541 | 2006 |
| 32 | [Innovance Consultancy](https://www.tamtam.ai/c/innovance-consultancy) (innovance.com.tr)<br>Innovance provides technology solutions and expertise to help clients capitalize on digitization opportunities, achieve profitability, and scale their businesses globally | IT Services and IT Consulting | 🇹🇷 Maslak | 538 | 2017 |
| 33 | [TEKNOSER](https://www.tamtam.ai/c/teknoser) (teknoserbilisim.com)<br>A leading systems integration and field services provider in the information and communication technology market with expertise in installation, maintenance, and support services | IT Services and IT Consulting | 🇹🇷 Istanbul | 530 | 1998 |
| 34 | [AKGÜN](https://www.tamtam.ai/c/akgun) (akgun.com.tr)<br>A technology-focused organization offering solutions in healthcare, telecommunications, education, and defense sectors, with expertise in software development, system integration, and information security technologies | IT Services and IT Consulting | 🇹🇷 Ankara | 519 | 1986 |
| 35 | [Teknofix](https://www.tamtam.ai/c/teknofix) (teknofix.com.tr)<br>A tech support provider offering end-to-end services for seamless digital experiences, focusing on user security and innovation, with a mobile device repair academy for technicians | Telecommunications | 🇹🇷 Istanbul | 518 | 2011 |
| 36 | [GTech](https://www.tamtam.ai/c/gtech-istanbul) (gtech.com.tr)<br>A pioneering technology enterprise specializing in digital transformation for the financial sector, offering advanced software solutions, banking products, and data management services | IT Services and IT Consulting | 🇹🇷 Istanbul | 512 | 2000 |
| 37 | [Testinium](https://www.tamtam.ai/c/testinium) (testinium.com)<br>Innovative team providing software consulting, test outsourcing, and training services with expertise in various testing approaches and frameworks | IT Services and IT Consulting | 🇹🇷 Istanbul | 492 | 2010 |
| 38 | [Kontrolmatik Technologies](https://www.tamtam.ai/c/kontrolmatik-technologies) (kontrolmatik.com)<br>Provider of comprehensive solutions and services in LV/MV/HV, SCADA, automation, cybersecurity, and IoT for the energy, transportation, industrial, and mining sectors | Technology, Information and Internet | 🇹🇷 Sariyer | 492 | 2008 |
| 39 | [TAV Technologies](https://www.tamtam.ai/c/tav-technologies) (tavtechnologies.aero)<br>A trusted partner in airport technology, offering tailored solutions, round-the-clock support, and a proven international track record for seamless operations | IT Services and IT Consulting | 🇹🇷 Istanbul | 481 | 2005 |
| 40 | [İSBAK](https://www.tamtam.ai/c/isbak) (isbak.istanbul)<br>Technology provider for İBB, enhancing the municipality's services and operations through innovative solutions and digital advancements | Technology, Information and Internet | 🇹🇷 Istanbul | 476 | 1986 |
| 41 | [Artı ve Artı Teknoloji Hizmetleri](https://www.tamtam.ai/c/art-ve-art-teknoloji-hizmetleri) (artivearti.com)<br>A domestic technology services provider partnering with leading global tech companies, offering diverse solutions with a customer-focused approach and modern management practices | IT Services and IT Consulting | 🇹🇷 Istanbul | 463 | 1998 |
| 42 | [Detaysoft](https://www.tamtam.ai/c/detaysoft) (detaysoft.com)<br>Leader in SAP solutions, driving digital transformation through R&D, expert consultants, and global partnerships Trusted by 300+ clients with 1000+ successful projects worldwide | Software Development | 🇹🇷 Istanbul | 444 | 1999 |
| 43 | [DİAS Teknoloji](https://www.tamtam.ai/c/dias-teknoloji) (diasteknoloji.com)<br>The company provides innovative solutions in product tracking and management, focusing on product safety, public health, and tax revenue protection | IT System Custom Software Development | 🇹🇷 Ataşehir | 439 | 2021 |
| 44 | [SFS Software & Consultancy CO.](https://www.tamtam.ai/c/sfs-software-and-consultancy-co) (sfs.com.tr)<br>Specializing in providing software solutions and consulting services for the insurance industry, including a wide range of management systems for different insurance branches | Software Development | 🇹🇷 Maslak | 435 | 1992 |
| 45 | [Atmosware](https://www.tamtam.ai/c/atmosware) (atmosware.com.tr)<br>An organization focused on developing high-quality software and training skilled developers to meet the increasing demand in the digitalization era | IT Services and IT Consulting | 🇹🇷 Maltepe | 435 | 2021 |
| 46 | [SabancıDx](https://www.tamtam.ai/c/sabanc-dx) (sabancidx.com)<br>Specializing in cybersecurity, advanced data analytics, digital marketing technologies, cloud services, and digital transformation products to offer innovative solutions to customers | IT Services and IT Consulting | 🇹🇷 Üsküdar | 412 |  |
| 47 | [DefineX](https://www.tamtam.ai/c/definex) (teamdefinex.com)<br>A forward-thinking consulting house and venture builder focused on digital acceleration, innovation, and cultivating talent for the success of tomorrow | Business Consulting and Services | 🇹🇷 Istanbul | 405 | 2019 |
| 48 | [ETB Group](https://www.tamtam.ai/c/etb-group) (etb-group.com)<br>A leading service provider offering omni-channel customer experience management services across Europe, specializing in customer care, technical support, and tailored solutions | Outsourcing and Offshoring Consulting | 🇹🇷 Istanbul | 393 | 2003 |
| 49 | [i2i Systems](https://www.tamtam.ai/c/i2i-systems) (i2i-systems.com)<br>An innovative international IT specialist in telecommunications, offering 5G solutions and converged revenue management for CSPs with scalable, cloud-native, and modular systems | Telecommunications | 🇹🇷 Esenler | 393 | 2007 |
| 50 | [BTC Bilişim Hizmetleri](https://www.tamtam.ai/c/btc-bilisim-hizmetleri) (btc-ag.com.tr)<br>Specializing in IT-focused business consulting, we optimize processes, provide analysis, management support, and design personalized IT environments for clients' long-term development | IT Services and IT Consulting | 🇹🇷 İçerenköy | 383 | 1995 |

## 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 Turkey

- [The largest companies in Turkey](https://www.tamtam.ai/l/largest-companies-turkey) (3,556)
- [Multinational companies in Turkey](https://www.tamtam.ai/l/multinational-companies-turkey) (790)
- [Manufacturers in Turkey](https://www.tamtam.ai/l/manufacturers-turkey) (762)
- [Companies with in-house R&D in Turkey](https://www.tamtam.ai/l/r-and-d-companies-turkey) (512)
- [Retail chains in Turkey](https://www.tamtam.ai/l/retail-chains-turkey) (376)
- [Companies with a mobile app in Turkey](https://www.tamtam.ai/l/companies-with-mobile-app-turkey) (312)
- [Corporate groups and holding companies in Turkey](https://www.tamtam.ai/l/holding-companies-turkey) (304)
- [Critical infrastructure operators in Turkey](https://www.tamtam.ai/l/critical-infrastructure-operators-turkey) (282)
- [Public sector organisations in Turkey](https://www.tamtam.ai/l/public-sector-organisations-turkey) (227)
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- [Energy companies in Turkey](https://www.tamtam.ai/l/energy-companies-turkey) (197)
- [Food and beverage companies in Turkey](https://www.tamtam.ai/l/food-and-beverage-companies-turkey) (197)
- [Consumer goods companies in Turkey](https://www.tamtam.ai/l/consumer-goods-companies-turkey) (193)
- [Food and Beverage Manufacturing companies in Turkey](https://www.tamtam.ai/l/food-and-beverage-manufacturing-companies-turkey) (184)
- [Hotel and hospitality groups in Turkey](https://www.tamtam.ai/l/hospitality-groups-turkey) (176)
- [E-commerce companies in Turkey](https://www.tamtam.ai/l/ecommerce-companies-turkey) (172)
- [Higher Education companies in Turkey](https://www.tamtam.ai/l/higher-education-companies-turkey) (158)
- [Food and Beverage Services companies in Turkey](https://www.tamtam.ai/l/food-and-beverage-services-companies-turkey) (149)
- [Family-owned companies in Turkey](https://www.tamtam.ai/l/family-owned-companies-turkey) (137)
- [Financial services firms in Turkey](https://www.tamtam.ai/l/financial-services-firms-turkey) (134)
- [Motor Vehicle Manufacturing companies in Turkey](https://www.tamtam.ai/l/motor-vehicle-manufacturing-companies-turkey) (134)
- [Publicly traded companies in Turkey](https://www.tamtam.ai/l/publicly-traded-companies-turkey) (131)
- [Construction companies in Turkey](https://www.tamtam.ai/l/construction-companies-turkey) (129)
- [Automotive manufacturers and suppliers in Turkey](https://www.tamtam.ai/l/automotive-companies-turkey) (128)

## The same list elsewhere in Turkey

- [IT services companies in Istanbul](https://www.tamtam.ai/l/it-services-companies-istanbul) (50)

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Source: https://www.tamtam.ai/l/it-services-companies-turkey