Company lists · Data refreshed September 2026

Top 25 Legacy system modernization firms based in Türkiye

Name: Legacy system modernization firms based in Türkiye
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 556 companies tracked

RevenueBase identified 556 legacy system modernization firms headquartered in Türkiye as of September 2026 and tracks 6,095 professional contacts across them, including 1,798 with verified work emails. Istanbul is the largest hub.

This list covers legacy system modernization firms headquartered in Türkiye, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

556Companies

6,095Contacts tracked

1,798Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest legacy system modernization firms based in Türkiye

Ranked by team size

Top 25 of 556 legacy system modernization firms based in Türkiye, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to legacy system modernization firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Innovance Consultancy	Indirect evidence	Maslak, TürkiyeHQ checked Sep 20, 2026	501-1,000	529 contacts →
	Indirect evidence “Innovance provides its clients with technology-based applications and expertise to capitalize on the vast array of opportunities which have arisen with digitization.” Source: RevenueBase Database · checked Sep 20, 2026
2	Solvia Digital Solutions	Indirect evidence	İstanbul, TürkiyeHQ checked Sep 20, 2026	201-500	386 contacts →
	Indirect evidence “At Solvia Digital Solutions, we believe technology should not just support business processes it should elevate them.” Source: RevenueBase Database · checked Sep 20, 2026
3	PIA People In Action	Indirect evidence	Istanbul, TürkiyeHQ checked Sep 20, 2026	201-500	285 contacts →
	Indirect evidence “Welcome to PiA, where we put People in Action to accelerate our client’s technology innovation cycles and help them addressing hyper-competition.” Source: RevenueBase Database · checked Sep 20, 2026
4	Golive Yazılım A.Ş	Indirect evidence	İstanbul, TürkiyeHQ checked Sep 20, 2026	201-500	237 contacts →
	Indirect evidence “We Add Intelligence to Your Future!” Source: RevenueBase Database · checked Sep 20, 2026
5	Destek A.Ş	Indirect evidence	Ankara, TürkiyeHQ checked Sep 20, 2026	501-1,000	217 contacts →
	Indirect evidence “İşletmenizi Geleceğe Taşıyoruz Destek Bilgisayar olarak, iş dünyasının teknoloji ve dijital dönüşüm yolculuğunda yenilikçi, öncü ve güvenilir bir yol arkadaşı olmak için…” Source: RevenueBase Database · checked Sep 20, 2026
6	Eteration	Indirect evidence	Sarıyer, TürkiyeHQ checked Sep 20, 2026	51-200	178 contacts →
	Indirect evidence “Eteration, a leading technology partner empowering businesses in their digital transformation journeys since 2002.” Source: RevenueBase Database · checked Sep 20, 2026
7	Peakup	Indirect evidence	Istanbul, TürkiyeHQ checked Sep 20, 2026	51-200	121 contacts →
	Indirect evidence “For over 14 years, PEAKUP has been driving digital transformation with a vision to shape the future through technology.” Source: RevenueBase Database · checked Sep 20, 2026
8	ENOCA	Indirect evidence	Atasehir, TürkiyeHQ checked Sep 20, 2026	51-200	104 contacts →
	Indirect evidence “2013 yılında kurulan enoca, SAP ekosistemindeki derin uzmanlığıyla öne çıkan bir teknoloji ve danışmanlık şirketidir.” Source: RevenueBase Database · checked Sep 20, 2026
9	Bimsa Uluslararası İş, Bilgi VE Yönetim Sistemleri	Indirect evidence	Istanbul, TürkiyeHQ checked Sep 20, 2026	201-500	102 contacts →
	Indirect evidence “1975 yılında Sabancı Holding bünyesinde kurulan BİMSA, 40 yıllık deneyimi ile Türkiye’nin önde gelen bilgi teknolojisi şirketlerindendir.” Source: RevenueBase Database · checked Sep 20, 2026
10	Medyasoft Bilişim Grubu	Indirect evidence	Istanbul, TürkiyeHQ checked Sep 20, 2026	201-500	80 contacts →
	Indirect evidence “As trusted business partner in digital transformation of enterprises, we deliver creative business solutions since through innovative technologies.” Source: RevenueBase Database · checked Sep 20, 2026
11	KG Teknoloji A.Ş	Indirect evidence	İstanbul, TürkiyeHQ checked Sep 20, 2026	201-500	79 contacts →
	Indirect evidence “KG Teknoloji’s know-how and experience dates back to the year of 2003.” Source: RevenueBase Database · checked Sep 20, 2026
12	TCM Bilisim VE Danismanlik Hizmetleri	Indirect evidence	İstanbul, TürkiyeHQ checked Sep 20, 2026	51-200	77 contacts →
	Indirect evidence “We started our journey in 2010 with the aim of providing consultancy and software development services in the field of information technology.” Source: RevenueBase Database · checked Sep 20, 2026
13	Global IT International	Indirect evidence	İstanbul, TürkiyeHQ checked Sep 20, 2026	51-200	70 contacts →
	Indirect evidence “Global IT is a global technology partner helping businesses modernize their infrastructure and accelerate digital transformation through cloud and AI solutions.” Source: RevenueBase Database · checked Sep 20, 2026
14	TRNET	Indirect evidence	İzmir, TürkiyeHQ checked Sep 20, 2026	51-200	62 contacts →
	Indirect evidence “TRNET A.Ş, bilişim teknolojileri alanında uçtan uca çözümler sunan, dijitalleşme sürecinizde ihtiyaç duyacağınız tüm yenilikçi teknolojik çözümleri tek çatı altında toplayan bir…” Source: RevenueBase Database · checked Sep 20, 2026
15	Softalya Software INC	Indirect evidence	Konyaaltı, TürkiyeHQ checked Sep 20, 2026	11-50	61 contacts →
	Indirect evidence “Welcome to the tech playground of the future.” Source: RevenueBase Database · checked Sep 20, 2026
16	Indisol Bilişim VE Teknoloji	Indirect evidence	İstanbul, TürkiyeHQ checked Sep 20, 2026	51-200	59 contacts →
	Indirect evidence “Indisol, teknoloji ve dijital dönüşümü odağına alıp yeni ve daha büyük başarılara imza atmak üzere OYAK bünyesinde öncelikle OYAK Grup Şirketlerine hizmet etmek amacıyla 2023…” Source: RevenueBase Database · checked Sep 20, 2026
17	ELOGO	Indirect evidence	Gebze, TürkiyeHQ checked Sep 20, 2026	51-200	50 contacts →
	Indirect evidence “Türkiye'nin en çok tercih edilen dijital dönüşüm çözüm ortağı eLogo, tüm yazılımlarla entegre olabilen altyapısı, uzman kadrosu ve müşteri odaklı hizmet yapısıyla şirketinizin ve…” Source: RevenueBase Database · checked Sep 20, 2026
18	Basistek Information Technologies	Indirect evidence	İstanbul, TürkiyeHQ checked Sep 20, 2026	51-200	47 contacts →
	Indirect evidence “Founded in 2009, BASISTEK is certified to ISO 9001, ISO and ISO 27001 standards and delivers AI-powered autonomous IT services, value-driven IT solutions, and ServiceOps…” Source: RevenueBase Database · checked Sep 20, 2026
19	Elsa Bilişim	Indirect evidence	TürkiyeHQ checked Sep 20, 2026	51-200	46 contacts →
	Indirect evidence “ELSA BİLİŞİM A.Ş.” Source: RevenueBase Database · checked Sep 20, 2026
20	NBS Venture	Indirect evidence	Nilüfer, TürkiyeHQ checked Sep 20, 2026	11-50	43 contacts →
	Indirect evidence “Transform your business with NBS Venture, the modern digital transformation and consulting company.” Source: RevenueBase Database · checked Sep 20, 2026
21	ADL	Indirect evidence	Ankara, TürkiyeHQ checked Sep 20, 2026	51-200	43 contacts →
	Indirect evidence “İşinizi yazılıma dönüştürüyoruz.” Source: RevenueBase Database · checked Sep 20, 2026
22	Aksis Dijital Çözümler	Indirect evidence	İstanbul, TürkiyeHQ checked Sep 20, 2026	11-50	42 contacts →
	Indirect evidence “AKSIS has been in the Digital Transformations business since 1994.” Source: RevenueBase Database · checked Sep 20, 2026
23	Pentanom	Indirect evidence	Istanbul, TürkiyeHQ checked Sep 20, 2026	51-200	42 contacts →
	Indirect evidence “Pentanom is an enterprise technology partner focused on AI-driven digital transformation.” Source: RevenueBase Database · checked Sep 20, 2026
24	Conevel Bilgi Teknolojileri A.Ş	Indirect evidence	Istanbul, TürkiyeHQ checked Sep 20, 2026	11-50	40 contacts →
	Indirect evidence “Conevel Bilgi Teknolojileri” Source: RevenueBase Database · checked Sep 20, 2026
25	VNGRS	Indirect evidence	Istanbul, TürkiyeHQ checked Sep 20, 2026	51-200	40 contacts →
	Indirect evidence “VNGRS is an end-to-end solutions partner that helps enterprises and scale-ups build the desired digital experiences.” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: legacy system modernization firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names legacy system modernization firms.
Partial evidence: Its own public description names part of legacy system modernization firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name legacy system modernization firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 556 legacy system modernization firms based in Türkiye

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,798 reachable decision-makers.

Free signup · no credit card

View the full list →

Legacy system modernization firms based in Türkiye at a glance

As of Sep 20, 2026

29.5%Verified-email coverage

11.0Average contacts per company

1-10Median size (employees)

37.6%Largest-city concentration · Istanbul

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

351

11-50

150

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for Türkiye, so it is reported there. Company counts and contact totals on this page are exact for Türkiye, over 556 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among legacy system modernization firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Türkiye whose own description of what they do matches “legacy system modernization firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names legacy system modernization firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among legacy system modernization firms, and records with no verified work email. Companies headquartered outside Türkiye are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 1,798 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Legacy system modernization firms by metro

Legacy system modernization firms in Istanbul209
Legacy system modernization firms in Ankara41

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names legacy system modernization firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many legacy system modernization firms are there based in Türkiye?

RevenueBase identified 556 legacy system modernization firms headquartered in Türkiye as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Innovance Consultancy, headquartered in Istanbul, tops this list with the largest team on record.

Which city has the most legacy system modernization firms?

Istanbul leads with 209 headquartered companies, followed by Ankara (41) and Izmir (19).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,798 verified decision-maker contacts tracked across these 556 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

Ready to reach these companies? Verified emails and direct dials for all 556 legacy system modernization firms based in Türkiye. Start with a free account, no credit card.

Download this list →

Related lists

Legacy system modernization firms by geography

Browse the directory

About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.