Company lists · Data refreshed September 2026

Top 25 Legacy system modernization companies based in Greece

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 95 companies tracked

RevenueBase identified 95 legacy system modernization companies headquartered in Greece as of September 2026 and tracks 2,904 professional contacts across them, including 1,353 with verified work emails. Athens is the largest hub.

This list covers legacy system modernization companies headquartered in Greece, 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

95Companies

2,904Contacts tracked

1,353Verified emails

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The 25 largest legacy system modernization companies based in Greece

Ranked by team size

Top 25 of 95 legacy system modernization companies based in Greece, 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 companies: 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	Accenture Greece	Indirect evidence	Kifisia, GreeceHQ checked Sep 20, 2026	1,001-5,000	1,171 contacts →
	Indirect evidence “Η Accenture είναι ηγέτιδα εταιρεία παροχής συμβουλευτικών υπηρεσιών σε παγκόσμιο επίπεδο, δημιουργώντας απτή αξία με ταχύτητα και σε μεγάλη κλίμακα.” Source: RevenueBase Database · checked Sep 20, 2026
2	Cognity	Indirect evidence	Athens, GreeceHQ checked Sep 20, 2026	201-500	397 contacts →
	Indirect evidence “Cognity is the Digital Enabler of the leading Telecommunications, Financial Services and Retail organisations in Europe, Middle East and South Africa.” Source: RevenueBase Database · checked Sep 20, 2026
3	Performance Technologies S.A	Indirect evidence	Athens, GreeceHQ checked Sep 20, 2026	201-500	227 contacts →
	Indirect evidence “Performance Technologies is a trusted partner for organizations redefining themselves through digital transformation.” Source: RevenueBase Database · checked Sep 20, 2026
4	Inttrust S.A	Indirect evidence	Ag. Paraskevi, GreeceHQ checked Sep 20, 2026	51-200	146 contacts →
	Indirect evidence “Established in 2006, InTTrust is an IT Consulting, Technology and Digital solutions and services provider.” Source: RevenueBase Database · checked Sep 20, 2026
5	Upcominds	Indirect evidence	Dafni, GreeceHQ checked Sep 20, 2026	201-500	145 contacts →
	Indirect evidence “UpcoMinds is a dynamic Information Technology company that provides Managed IT Services, Mobile Apps (IOS, Android), IT Consulting and Support, Software Architecture & Design…” Source: RevenueBase Database · checked Sep 20, 2026
6	Meccanica	Indirect evidence	Thessaloniki, GreeceHQ checked Sep 20, 2026	1,001-5,000	88 contacts →
	Indirect evidence “Η MECCANICA, ως post-tech εταιρεία-ηγέτης στην Ελλάδα, προσφέρει ολοκληρωμένες λύσεις για δημόσιους και ιδιωτικούς φορείς, μέσα από μία συνδυαστική προσέγγιση μελέτης, σχεδιασμού…” Source: RevenueBase Database · checked Sep 20, 2026
7	Syntax IT Group	Indirect evidence	Athens, GreeceHQ checked Sep 20, 2026	51-200	79 contacts →
	Indirect evidence “SYNTAX is a software, consulting, onsite & outsource IT services pioneer, operating from its Athens headquarters in Greece & EU, and in the Arabian Gulf from its affiliates SYNTAX…” Source: RevenueBase Database · checked Sep 20, 2026
8	Office Line SA	Indirect evidence	Ag. Dimitrios, GreeceHQ checked Sep 20, 2026	51-200	69 contacts →
	Indirect evidence “Office Line S.A is an internationally recognized leading Cloud Solutions Provider and Digital Transformation company, empowering customers’ specific business requirements, while…” Source: RevenueBase Database · checked Sep 20, 2026
9	Connect Line	Indirect evidence	Marousi, GreeceHQ checked Sep 20, 2026	51-200	62 contacts →
	Indirect evidence “Η πορείας μας στην επιτυχία: Η Connectline ιδρύθηκε το 1998 και δραστηριοποιείται με επιτυχία στο χώρο της πληροφορικής.” Source: RevenueBase Database · checked Sep 20, 2026
10	Softweb Adaptive I.T. Solutions	Indirect evidence	Thessaloniki, GreeceHQ checked Sep 20, 2026	51-200	59 contacts →
	Indirect evidence “Welcome to Softweb Adaptive I.T.” Source: RevenueBase Database · checked Sep 20, 2026
11	Data Noesis	Indirect evidence	Άγιοι Ανάργυροι, GreeceHQ checked Sep 20, 2026	11-50	35 contacts →
	Indirect evidence “Data Noesis follows a market-oriented approach in order to drive each customer in a digital transformation journey, with innovative solutions and professional services.” Source: RevenueBase Database · checked Sep 20, 2026
12	Pentasoft Consulting M.A.E	Indirect evidence	Thermi, GreeceHQ checked Sep 20, 2026	11-50	21 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
13	Existanze Connectingdots	Indirect evidence	Agía Paraskeví, GreeceHQ checked Sep 20, 2026	11-50	20 contacts →
	Indirect evidence “Existanze #connectingdots is a highly competitive multidisciplinary software company.” Source: RevenueBase Database · checked Sep 20, 2026
14	Accutech S.A	Indirect evidence	Agios Dimitrios, GreeceHQ checked Sep 20, 2026	11-50	16 contacts →
	Indirect evidence “Accutech is a state-of-the-art, customer-centric IT, digital transformation and advanced solutions company based in Athens, Greece, operating in Europe and Greece and…” Source: RevenueBase Database · checked Sep 20, 2026
15	Rocket Path P.C	Indirect evidence	Athens, GreeceHQ checked Sep 20, 2026	11-50	15 contacts →
	Indirect evidence “Our mission is to be a trusted partner in our clients' digital transformation journeys, delivering cutting-edge technology solutions that simplify complexities, bridge gaps…” Source: RevenueBase Database · checked Sep 20, 2026
16	Codable	Indirect evidence	Thessaloniki, GreeceHQ checked Sep 20, 2026	11-50	15 contacts →
	Indirect evidence “At Codable, we partner with organizations undergoing digital and operational change.” Source: RevenueBase Database · checked Sep 20, 2026
17	EXIS	Indirect evidence	Athens, GreeceHQ checked Sep 20, 2026	11-50	15 contacts →
	Indirect evidence “EXIS is a dynamic Software, IT Consulting & Web Development company, trusted by a wide and diverse spectrum of companies across industries.” Source: RevenueBase Database · checked Sep 20, 2026
18	Alphacons Intelligent Technology Solutions S.A	Indirect evidence	Iraklio, GreeceHQ checked Sep 20, 2026	11-50	14 contacts →
	Indirect evidence “AlphaCons is a consulting firm focusing on Technology.” Source: RevenueBase Database · checked Sep 20, 2026
19	Protogramma Informatics	Indirect evidence	Thessaloniki, GreeceHQ checked Sep 20, 2026	11-50	13 contacts →
	Indirect evidence “With over 30 years of honing business computerization and processes, Protogramma Informatics stands as a seasoned team, guiding enterprises towards optimal solutions in the…” Source: RevenueBase Database · checked Sep 20, 2026
20	Plushorizon	Indirect evidence	Elliniko - Argyroupoli, GreeceHQ checked Sep 20, 2026	11-50	12 contacts →
	Indirect evidence “Welcome to PlusHorizon, your trusted partner for comprehensive IT Outsourcing Services.” Source: RevenueBase Database · checked Sep 20, 2026
21	NUS Solutions	Indirect evidence	Athens, GreeceHQ checked Sep 20, 2026	11-50	10 contacts →
	Indirect evidence “NUS Solutions is a pioneering player in the field of Business Information Technology.” Source: RevenueBase Database · checked Sep 20, 2026
22	360 Trust Services	Indirect evidence	Maroussi, GreeceHQ checked Sep 20, 2026	1-10	10 contacts →
	Indirect evidence “Enable success.” Source: RevenueBase Database · checked Sep 20, 2026
23	Computing Business Solutions	Indirect evidence	Athens, GreeceHQ checked Sep 20, 2026	11-50	10 contacts →
	Indirect evidence “From the founding of our company until today, our vision and passion, remains one and only: to provide each company with unique and valuable solutions.” Source: RevenueBase Database · checked Sep 20, 2026
24	Aardvark, ISC SA	Indirect evidence	Marousi, GreeceHQ checked Sep 20, 2026	11-50	7 contacts →
	Indirect evidence “AArdVark, isc SA is a Greek ΙΤ company founded in 1996.” Source: RevenueBase Database · checked Sep 20, 2026
25	Easy Systems S.A	Partial evidence	Gerakas, GreeceHQ checked Sep 20, 2026	1-10	5 contacts →
	Partial evidence “EASY SYSTEMS was established at the end of 2008, from an expertise team coming from the banking sector, specializing in Information Systems and Telecoms, with experience in the…” 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 companies. 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 companies.
Partial evidence: Its own public description names part of legacy system modernization companies, 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 companies. 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 95 legacy system modernization companies based in Greece

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Legacy system modernization companies based in Greece at a glance

As of Sep 20, 2026

46.6%Verified-email coverage

30.6Average contacts per company

1-10Median size (employees)

34.7%Largest-city concentration · Athens

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Email recency for this list is measured worldwide rather than for Greece, so it is reported there. Company counts and contact totals on this page are exact for Greece, over 95 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 companies, 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 Greece whose own description of what they do matches “legacy system modernization companies”. 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 companies), 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 companies, and records with no verified work email. Companies headquartered outside Greece 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, 1,353 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 companies by metro

Legacy system modernization companies in Athens33

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 companies, 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 companies are there based in Greece?

RevenueBase identified 95 legacy system modernization companies headquartered in Greece 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?

Accenture Greece, headquartered in Athens, tops this list with the largest team on record.

Which city has the most legacy system modernization companies?

Athens leads with 33 headquartered companies, followed by Piraeus (5) and Thessaloniki (4).

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 1,353 verified decision-maker contacts tracked across these 95 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.

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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.