Company lists · Data refreshed September 2026

Top 25 Advisory and outsourcing services based in Sofia, Bulgaria

Name: Advisory and outsourcing services based in Sofia, Bulgaria
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 23, 2026 221 companies tracked

RevenueBase identified 221 advisory and outsourcing services headquartered in Sofia, Bulgaria as of September 2026 and tracks 2,341 professional contacts across them, including 419 with verified work emails and 72 with mobile numbers. Sofia is the largest hub.

This list covers advisory and outsourcing services headquartered in Sofia, Bulgaria, 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 23, 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 23, 2026 86% judged on-target in blind review

221Companies

2,341Contacts tracked

419Verified emails

72Mobile numbers

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The 25 largest advisory and outsourcing services based in Sofia, Bulgaria

Ranked by team size

Top 25 of 221 advisory and outsourcing services based in Sofia, Bulgaria, ranked by team size, largest first. Data refreshed Sep 23, 2026. RevenueBase Smart Search rates how each company's information relates to advisory and outsourcing services: 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	Eastvantage	Partial evidence	Sofia, BulgariaHQ checked Sep 23, 2026	1,001-5,000	452 contacts →
	Partial evidence “Eastvantage is a global managed services and outsourcing partner helping businesses grow with confidence through reliable, scalable, and technology-enabled delivery.” Source: RevenueBase Database · checked Sep 23, 2026
2	Publix LTD	Indirect evidence	Sofia, BulgariaHQ checked Sep 23, 2026	51-200	222 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 23, 2026
3	Energize Global Services Bulgaria	Partial evidence	Sofia, BulgariaHQ checked Sep 23, 2026	51-200	100 contacts →
	Partial evidence “Energize Global Services [EGS] is founded with a vision of adding value and increasing revenues for clients through cost-effective software development and IT outsourcing services.” Source: RevenueBase Database · checked Sep 23, 2026
4	Stemo LTD	Indirect evidence	Sofia, BulgariaHQ checked Sep 23, 2026	201-500	100 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 23, 2026
5	Balkan Services	Indirect evidence	Sofia, BulgariaHQ checked Sep 23, 2026	11-50	61 contacts →
	Indirect evidence “Balkan Services is an IT consulting company that helps businesses implement leading solutions like NetSuite, Qlik, Lucanet, and Softone to work smarter, faster, and more…” Source: RevenueBase Database · checked Sep 23, 2026
6	GMS Bulgaria	Partial evidence	Sofia, BulgariaHQ checked Sep 23, 2026	51-200	59 contacts →
	Partial evidence “GMS Bulgaria is a young progressive company that provides outsourcing services to clients worldwide.” Source: RevenueBase Database · checked Sep 23, 2026
7	Protiviti Bulgaria	Indirect evidence	Sofia, BulgariaHQ checked Sep 23, 2026	n/a	58 contacts →
	Indirect evidence “Protiviti is a leading global consulting firm delivering deep expertise, objective insights, and tailored solutions to help businesses confidently navigate the future.” Source: RevenueBase Database · checked Sep 23, 2026
8	Mercatus Outsourcing	Partial evidence	Sofia, BulgariaHQ checked Sep 23, 2026	51-200	51 contacts →
	Partial evidence “Mercatus is an international BPO and ITO service provider delivering tailored outsourcing solutions that help businesses streamline operations, accelerate growth, and achieve…” Source: RevenueBase Database · checked Sep 23, 2026
9	BL Consulting LTD	Indirect evidence	Sofia, BulgariaHQ checked Sep 23, 2026	n/a	43 contacts →
	Indirect evidence “BL Consulting Ltd is a high-tech consulting company.” Source: RevenueBase Database · checked Sep 23, 2026
10	Baker Tilly Bulgaria	Partial evidence	Sofia, BulgariaHQ checked Sep 23, 2026	501-1,000	34 contacts →
	Partial evidence “Baker Tilly South East Europe is a leading provider of accounting, audit, tax, and advisory services in the region, and a proud member of Baker Tilly International – a global top…” Source: RevenueBase Database · checked Sep 23, 2026
11	BGS	Indirect evidence	Sofia, BulgariaHQ checked Sep 23, 2026	11-50	28 contacts →
	Indirect evidence “We are a Business to Business (B2B) IT Services provider.” Source: RevenueBase Database · checked Sep 23, 2026
12	Devocean Solutions	Indirect evidence	Sofia, BulgariaHQ checked Sep 23, 2026	51-200	24 contacts →
	Indirect evidence “Since 2014, we have helped our partners to.” Source: RevenueBase Database · checked Sep 23, 2026
13	Noser Bulgaria	Indirect evidence	Sofia, BulgariaHQ checked Sep 23, 2026	11-50	21 contacts →
	Indirect evidence “As part of the Noser Group, Noser Bulgaria provides high-quality nearshoring services for the companies of the Noser Group.” Source: RevenueBase Database · checked Sep 23, 2026
14	Relean	Indirect evidence	Sofia, BulgariaHQ checked Sep 23, 2026	11-50	18 contacts →
	Indirect evidence “Unsere Fachexperten helfen Ihnen sich einen Wettbewerbsvorteil in der Branche zu verschaffen.” Source: RevenueBase Database · checked Sep 23, 2026
15	Quantum Omega	Partial evidence	Sofia, BulgariaHQ checked Sep 23, 2026	51-200	18 contacts →
	Partial evidence “Quantum Omega Group – The Future Today; is an international leading Outsourcing, Development, and Consulting Solutions provider with a proven track record of successful Dynamics…” Source: RevenueBase Database · checked Sep 23, 2026
16	Toro Group S LTD	Indirect evidence	Sofia, BulgariaHQ checked Sep 23, 2026	201-500	14 contacts →
	Indirect evidence “Toro Group S (TGS) is a leading HR consulting company operating on the Bulgarian market for more than 20 years.” Source: RevenueBase Database · checked Sep 23, 2026
17	1crew	Indirect evidence	Sofia, BulgariaHQ checked Sep 23, 2026	11-50	14 contacts →
	Indirect evidence “1Crew is a fast-growing digital services company with focus in consulting, automation services and operations.” Source: RevenueBase Database · checked Sep 23, 2026
18	SVH Consult	Indirect evidence	Sofia, BulgariaHQ checked Sep 23, 2026	11-50	11 contacts →
	Indirect evidence “SVH CONSULT LTD is a company with big experience and accumulated know-how in the following fields: accounting and social security sector, tax and management consultancy as well as…” Source: RevenueBase Database · checked Sep 23, 2026
19	Simbula	Indirect evidence	Sofia, BulgariaHQ checked Sep 23, 2026	11-50	10 contacts →
	Indirect evidence “Simbula is your one-stop powerhouse for financial, accounting, human capital, legal and management consulting services.” Source: RevenueBase Database · checked Sep 23, 2026
20	The Bytesmiths	Indirect evidence	Sofia, BulgariaHQ checked Sep 23, 2026	1-10	9 contacts →
	Indirect evidence “We are a team of creative principal professionals in the field of information technology, insurance, finance and project management dedicated to guide you, our clients, and help…” Source: RevenueBase Database · checked Sep 23, 2026
21	Band Consulting & Management LTD	Partial evidence	Sofia, BulgariaHQ checked Sep 23, 2026	11-50	8 contacts →
	Partial evidence “BAND-consulting & management Ltd.(BAND) is a group of Bulgarian of companies for accounting, auditing, advisory and other consulting services incorporated under the Bulgarian…” Source: RevenueBase Database · checked Sep 23, 2026
22	Koleff & Partners	Partial evidence	Sofia, BulgariaHQ checked Sep 23, 2026	1-10	8 contacts →
	Partial evidence “We are a financial advisory firm with focus on- bank debt advisory - investor readiness assessment/preparation - equity and mezzanine capital raising - Selling a business - Buying…” Source: RevenueBase Database · checked Sep 23, 2026
23	TPA Bulgaria	Partial evidence	Sofia, BulgariaHQ checked Sep 23, 2026	11-50	8 contacts →
	Partial evidence “TPA in Bulgaria Our office in Bulgaria, based in Sofia, offers services in the fields of Accounting, Tax Advisory, Business Consulting and Audit.” Source: RevenueBase Database · checked Sep 23, 2026
24	Opsters	Indirect evidence	Sofia, BulgariaHQ checked Sep 23, 2026	11-50	6 contacts →
	Indirect evidence “Opsters is here to futureproof your operations.” Source: RevenueBase Database · checked Sep 23, 2026
25	Velinov & Partners Consulting House	Indirect evidence	Sofia, BulgariaHQ checked Sep 23, 2026	11-50	6 contacts →
	Indirect evidence “Velinov and Partners” Consulting House provides full legal service that might satisfy all needs of legal aid and assistance of its clients.” Source: RevenueBase Database · checked Sep 23, 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: advisory and outsourcing services. 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 advisory and outsourcing services.
Partial evidence: Its own public description names part of advisory and outsourcing services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name advisory and outsourcing services. 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 221 advisory and outsourcing services based in Sofia, Bulgaria

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Advisory and outsourcing services based in Sofia, Bulgaria at a glance

As of Sep 23, 2026

17.9%Verified-email coverage

3.1%Mobile-number coverage

10.6Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · Sofia

Sep 23, 2026Page data refreshed

Companies by employee count

1-10

133

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Freshness & accuracy

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

Email last verified

Median 25.0d

3020–30

10431–60

761–90

290–180

4180+

Company record updated

Median 88.0d

00–30

43631–60

1,08261–90

72990–180

94180+

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 advisory and outsourcing services, 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 Sofia, Bulgaria whose own description of what they do matches “advisory and outsourcing services”. 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 advisory and outsourcing services), 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 advisory and outsourcing services, and records with no verified work email. Companies headquartered outside Sofia 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, 419 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 23, 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.

Advisory and outsourcing services by metro in Bulgaria

Advisory and outsourcing services in Sofia221
Advisory and outsourcing services in Sofia City36

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 advisory and outsourcing services, 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 advisory and outsourcing services are there based in Sofia, Bulgaria?

RevenueBase identified 221 advisory and outsourcing services headquartered in Sofia, Bulgaria 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?

Eastvantage, headquartered in Sofia, tops this list with the largest team on record.

Which city has the most advisory and outsourcing services?

Sofia leads with 221 headquartered companies, followed by Sofia City (36) and Plovdiv (20).

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 419 verified decision-maker contacts tracked across these 221 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 23, 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.