Company lists · Data refreshed September 2026

Top 25 Accounting and outsourcing companies based in Greece

Name: Accounting and outsourcing companies based in Greece
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 337 companies tracked

RevenueBase identified 337 accounting and outsourcing companies headquartered in Greece as of September 2026 and tracks 1,699 professional contacts across them, including 343 with verified work emails and 37 with mobile numbers. Athens is the largest hub.

This list covers accounting and outsourcing 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 22, 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 22, 2026 86% judged on-target in blind review

337Companies

1,699Contacts tracked

343Verified emails

37Mobile numbers

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The 25 largest accounting and outsourcing companies based in Greece

Ranked by team size

Top 25 of 337 accounting and outsourcing companies based in Greece, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to accounting and outsourcing 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	Fovera Prostasia S.A	Partial evidence	Athens, GreeceHQ checked Sep 22, 2026	51-200	116 contacts →
	Partial evidence “Accounting - Taxation - Business Consulting OUR COMPANY Following many years of activity, Fovera Prostasia S.A.” Source: RevenueBase Database · checked Sep 22, 2026
2	Professional Services Solutions	Indirect evidence	Glyfada, GreeceHQ checked Sep 22, 2026	51-200	54 contacts →
	Indirect evidence “Our tailored business solutions enable employers to leverage our professional expertise to gain sufficient time and resources to focus on their core business activities.” Source: RevenueBase Database · checked Sep 22, 2026
3	Atlas Consulting	Partial evidence	Pylaia, GreeceHQ checked Sep 22, 2026	11-50	30 contacts →
	Partial evidence “is a Tax, Accounting, and Consulting Company that has its origin in Greece and is expanded internationally.” Source: RevenueBase Database · checked Sep 22, 2026
4	TGS Hellas	Indirect evidence	Maroussi, GreeceHQ checked Sep 22, 2026	11-50	29 contacts →
	Indirect evidence “tgs (Hellas) is the brand under which experienced professionals collaborate to provide integrated business services, audit, consulting, financial advisory, tax, compliance, legal…” Source: RevenueBase Database · checked Sep 22, 2026
5	Computax S.A	Indirect evidence	Kallithea, GreeceHQ checked Sep 22, 2026	11-50	28 contacts →
	Indirect evidence “Στην Computax, είμαστε αφοσιωμένοι στην παροχή εξαιρετικών λογιστικών υπηρεσιών που ενδυναμώνουν τις επιχειρήσεις να επιτύχουν τους οικονομικούς τους στόχους.” Source: RevenueBase Database · checked Sep 22, 2026
6	Kleopas Alliott Business Consultants SA	Partial evidence	Athens, GreeceHQ checked Sep 22, 2026	11-50	25 contacts →
	Partial evidence “Kleopas Alliott Business Consultants is an independent leading Accounting firm in Greece since 1990, with an innovative international orientation and a unique client focus service…” Source: RevenueBase Database · checked Sep 22, 2026
7	Interlog SA	Partial evidence	Athens, GreeceHQ checked Sep 22, 2026	11-50	21 contacts →
	Partial evidence “INTERLOG SA provides a range of high-quality services, including accounting, tax as well as advisory services to individuals, corporates and other organisations.” Source: RevenueBase Database · checked Sep 22, 2026
8	C&a Certified Public Accountants	Indirect evidence	Kallithea, GreeceHQ checked Sep 22, 2026	11-50	18 contacts →
	Indirect evidence “C&A was established in Athens in 2015.” Source: RevenueBase Database · checked Sep 22, 2026
9	Prooptiki SA	Partial evidence	Athens, GreeceHQ checked Sep 22, 2026	11-50	18 contacts →
	Partial evidence “Prooptiki was established as an accounting firm back in 1984; today, it is one of the most successful companies in the economic sector, providing consultation on accounting-tax…” Source: RevenueBase Database · checked Sep 22, 2026
10	Ambe Accounting Management & Business Enhancement	Partial evidence	Athens, GreeceHQ checked Sep 22, 2026	11-50	17 contacts →
	Partial evidence “AMBE Accounting Management & Business Enhancement has, since founding, been active in the area of tax, accounting and consultancy services aiming at the holistic support of…” Source: RevenueBase Database · checked Sep 22, 2026
11	Orion Certified Auditors SA	Indirect evidence	Irakleio, GreeceHQ checked Sep 22, 2026	11-50	16 contacts →
	Indirect evidence “Orion is a modern company of chartered accountants, with structures adapted to the requirements of today.” Source: RevenueBase Database · checked Sep 22, 2026
12	Taxstore Consulting	Partial evidence	Cholargos, GreeceHQ checked Sep 22, 2026	11-50	15 contacts →
	Partial evidence “Corporate Consulting Services/Accounting Outsourced Services/Payroll Outsourced Services/Tax Planning” Source: RevenueBase Database · checked Sep 22, 2026
13	Analog Group	Indirect evidence	Peiraias, GreeceHQ checked Sep 22, 2026	11-50	15 contacts →
	Indirect evidence “SaaS Consulting & Analog SA in their present form operate since early 2006.” Source: RevenueBase Database · checked Sep 22, 2026
14	Quantum Bits	Partial evidence	Athens, GreeceHQ checked Sep 22, 2026	11-50	14 contacts →
	Partial evidence “Quantum Business & IT Solutions was founded in 2013 with the purpose of providing consulting and training services in the areas of information technology and accounting.” Source: RevenueBase Database · checked Sep 22, 2026
15	Seretis Accounting	Partial evidence	Athens, GreeceHQ checked Sep 22, 2026	11-50	13 contacts →
	Partial evidence “Seretis Accounting has built a strong reputation as a trusted business and tax consultant over the past 20 years.” Source: RevenueBase Database · checked Sep 22, 2026
16	Metalign	Indirect evidence	Marousi, GreeceHQ checked Sep 22, 2026	51-200	13 contacts →
	Indirect evidence “METALIGN, subsidiary of Viohalco SA, is a finance business service company serving a wide range of clients located in Greece, Bulgaria and the UK.” Source: RevenueBase Database · checked Sep 22, 2026
17	Gnosi TAX & Accounting Experts	Partial evidence	Pylaia - Chortiatis, GreeceHQ checked Sep 22, 2026	11-50	12 contacts →
	Partial evidence “Gnosi Tax & Accounting Experts” is an accounting and tax services provider company for entities of any size and any field of the global economy.” Source: RevenueBase Database · checked Sep 22, 2026
18	KM Services Accounting & Consulting	Indirect evidence	Nea Smirni, GreeceHQ checked Sep 22, 2026	1-10	12 contacts →
	Indirect evidence “Η εταιρία μας στελεχωμένη με κατηρτισμένους συνεργάτες προσφέρει ολοκληρωμένες λογιστικές, φοροτεχνικές και συμβουλευτικές υπηρεσίες σε κάθε ενδιαφερόμενο φυσικό ή νομικό πρόσωπο.” Source: RevenueBase Database · checked Sep 22, 2026
19	Alpha Auditors	Indirect evidence	Thessaloniki, GreeceHQ checked Sep 22, 2026	1-10	11 contacts →
	Indirect evidence “Alpha Auditors" is a fast-growing company specializing in providing audit, consulting and tax services.” Source: RevenueBase Database · checked Sep 22, 2026
20	Spatiotis	Indirect evidence	Chaidari, GreeceHQ checked Sep 22, 2026	11-50	11 contacts →
	Indirect evidence “Λογιστής Λογιστική εταιρεία Σύμβουλος επιχειρήσεων Εφοριακός Αποτιμητής Φοροτεχνικός Chartered accountant Χρηματοποικονομικός σύμβουλος Γραφείο διεκπεραιώσης φορολογικών δηλώσεων…” Source: RevenueBase Database · checked Sep 22, 2026
21	Προβλεψη Α.Ε	Indirect evidence	Thessaloniki, GreeceHQ checked Sep 22, 2026	11-50	11 contacts →
	Indirect evidence “Η Β.Κ.” Source: RevenueBase Database · checked Sep 22, 2026
22	TMS Auditors S.A	Partial evidence	Athens, GreeceHQ checked Sep 22, 2026	11-50	10 contacts →
	Partial evidence “TMS Certified Public Accountants S.A is an independent firm established in Greece, providing a broad range of audit & assurance, tax, business advisory and accounting services.” Source: RevenueBase Database · checked Sep 22, 2026
23	Olympia Certified And Registered Auditors S.A	Indirect evidence	Athens, GreeceHQ checked Sep 22, 2026	11-50	10 contacts →
	Indirect evidence “OLYMPIA AUDITORS S.A.” Source: RevenueBase Database · checked Sep 22, 2026
24	EF Audit Certified Auditors & Business Consultants A.E	Indirect evidence	Elliniko - Argyroupoli, GreeceHQ checked Sep 22, 2026	11-50	9 contacts →
	Indirect evidence “Ef Audit A.E.” Source: RevenueBase Database · checked Sep 22, 2026
25	Fiveb Auditors S.A	Indirect evidence	Néa Ionía, GreeceHQ checked Sep 22, 2026	1-10	8 contacts →
	Indirect evidence “Founded in 2019, with headquarters in Larissa and offices in Athens and Thessaloniki, FiveB is a growing firm of chartered accountants offering bespoke audit, tax, advisory, and…” Source: RevenueBase Database · checked Sep 22, 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: accounting and outsourcing 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 accounting and outsourcing companies.
Partial evidence: Its own public description names part of accounting and outsourcing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name accounting and outsourcing 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 337 accounting and outsourcing companies based in Greece

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Accounting and outsourcing companies based in Greece at a glance

As of Sep 22, 2026

20.2%Verified-email coverage

2.2%Mobile-number coverage

5.0Average contacts per company

1-10Median size (employees)

20.8%Largest-city concentration · Athens

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

209

11-50

116

51-200

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 25.0d

2370–30

10031–60

661–90

090–180

0180+

Company record updated

Median 85.0d

00–30

44631–60

79361–90

39590–180

65180+

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 accounting and outsourcing 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 “accounting and outsourcing 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 accounting and outsourcing 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 accounting and outsourcing 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, 343 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 22, 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.

Accounting and outsourcing companies by metro

Accounting and outsourcing companies in Athens70

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 accounting and outsourcing 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 accounting and outsourcing companies are there based in Greece?

RevenueBase identified 337 accounting and outsourcing 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?

Fovera Prostasia S.A, headquartered in Greece, tops this list with the largest team on record.

Which city has the most accounting and outsourcing companies?

Athens leads with 70 headquartered companies, followed by Thessaloniki (17) and Attica (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 343 verified decision-maker contacts tracked across these 337 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 22, 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.