Company lists · Data refreshed September 2026

Top 25 Transformation consulting firms based in Sofia, Bulgaria

Name: Transformation consulting firms based in Sofia, Bulgaria
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 13, 2026 110 companies tracked

RevenueBase identified 110 transformation consulting firms headquartered in Sofia, Bulgaria as of September 2026 and tracks 1,384 professional contacts across them, including 529 with verified work emails and 16 with mobile numbers. Sofia is the largest hub.

This list covers transformation consulting firms 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 13, 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 13, 2026 86% judged on-target in blind review

110Companies

1,384Contacts tracked

529Verified emails

16Mobile numbers

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The 25 largest transformation consulting firms based in Sofia, Bulgaria

Ranked by team size

Top 25 of 110 transformation consulting firms based in Sofia, Bulgaria, ranked by team size, largest first. Data refreshed Sep 13, 2026. RevenueBase Smart Search rates how each company's information relates to transformation consulting 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	Accenture Bulgaria	Partial evidence	Sofia, BulgariaHQ checked Sep 13, 2026	1,001-5,000	448 contacts →
	Partial evidence “Combining unmatched experience and specialized skills across more than 40 industries, we offer Strategy and Consulting, Technology and Operations Services and Accenture Song - all…” Source: RevenueBase Database · checked Sep 13, 2026
2	ITCE	Indirect evidence	Sofia, BulgariaHQ checked Sep 13, 2026	11-50	140 contacts →
	Indirect evidence “ITCE has dedicated the last two decades on helping enterprises transform their IT departments in providing high quality services to the business units and enable them to be more…” Source: RevenueBase Database · checked Sep 13, 2026
3	Bright	Partial evidence	Sofia, BulgariaHQ checked Sep 13, 2026	51-200	126 contacts →
	Partial evidence “BRIGHT (2006–2026) was a leader in IT consulting, helping companies accelerate their digitalization and automation initiatives by delivering solutions designed to meet their…” Source: RevenueBase Database · checked Sep 13, 2026
4	Melon IS NOW KIN Carta	Indirect evidence	Sofia, BulgariaHQ checked Sep 13, 2026	1,001-5,000	83 contacts →
	Indirect evidence “Melon is now Kin + Carta.” Source: RevenueBase Database · checked Sep 13, 2026
5	Protiviti Bulgaria	Partial evidence	Sofia, BulgariaHQ checked Sep 13, 2026	n/a	58 contacts →
	Partial 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 13, 2026
6	BL Consulting LTD	Partial evidence	Sofia, BulgariaHQ checked Sep 13, 2026	n/a	43 contacts →
	Partial evidence “BL Consulting Ltd is a high-tech consulting company.” Source: RevenueBase Database · checked Sep 13, 2026
7	Denshi	Partial evidence	Sofia, BulgariaHQ checked Sep 13, 2026	11-50	42 contacts →
	Partial evidence “DENSHI is a young IT and digital service company offering custom software development and digital transformation services.” Source: RevenueBase Database · checked Sep 13, 2026
8	Concord EU	Indirect evidence	Sofia, BulgariaHQ checked Sep 13, 2026	201-500	37 contacts →
	Indirect evidence “Concord helps big companies untangle their business and technology messes.” Source: RevenueBase Database · checked Sep 13, 2026
9	Onebit Software	Indirect evidence	Sofia, BulgariaHQ checked Sep 13, 2026	11-50	17 contacts →
	Indirect evidence “Established in 2010, OneBit Software is a professional services company delivering collaboration, document management, data and process automation solutions worldwide.” Source: RevenueBase Database · checked Sep 13, 2026
10	Devteambg	Partial evidence	Sofia, BulgariaHQ checked Sep 13, 2026	11-50	16 contacts →
	Partial evidence “We are a digital transformation consultancy and software development company that provides cutting edge engineering solutions.” Source: RevenueBase Database · checked Sep 13, 2026
11	1crew	Partial evidence	Sofia, BulgariaHQ checked Sep 13, 2026	11-50	14 contacts →
	Partial evidence “1Crew is a fast-growing digital services company with focus in consulting, automation services and operations.” Source: RevenueBase Database · checked Sep 13, 2026
12	The Bytesmiths	Indirect evidence	Sofia, BulgariaHQ checked Sep 13, 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 13, 2026
13	Digitech Consult LTD	Partial evidence	Sofia, BulgariaHQ checked Sep 13, 2026	11-50	8 contacts →
	Partial evidence “At DigiTech Consult, digital transformation is made simple.” Source: RevenueBase Database · checked Sep 13, 2026
14	Perspective Unity	Partial evidence	Sofia, BulgariaHQ checked Sep 13, 2026	11-50	8 contacts →
	Partial evidence “At Perspective Unity, we are your strategic partner in navigating the ever-evolving landscape of digital transformation.” Source: RevenueBase Database · checked Sep 13, 2026
15	C-Trust	Indirect evidence	Sofia, BulgariaHQ checked Sep 13, 2026	11-50	6 contacts →
	Indirect evidence “C-TRUST has started as a community of business, IT and innovation experts who have a proven track record of success and extensive experience in the delivery of business…” Source: RevenueBase Database · checked Sep 13, 2026
16	Ninety Nine	Indirect evidence	Sofia, BulgariaHQ checked Sep 13, 2026	1-10	6 contacts →
	Indirect evidence “We are Ninety Nine - а consultancy for development of people and organizations.” Source: RevenueBase Database · checked Sep 13, 2026
17	Opsters	Indirect evidence	Sofia, BulgariaHQ checked Sep 13, 2026	11-50	6 contacts →
	Indirect evidence “Opsters is here to futureproof your operations.” Source: RevenueBase Database · checked Sep 13, 2026
18	Ibsolution Bulgaria	Indirect evidence	Sofia, BulgariaHQ checked Sep 13, 2026	11-50	5 contacts →
	Indirect evidence “As a memeber of the IBsolution group we Simplify Your Work Life with Process Innovations Based on the Latest Technologies.” Source: RevenueBase Database · checked Sep 13, 2026
19	Pbcs Group	Indirect evidence	Sofia, BulgariaHQ checked Sep 13, 2026	11-50	5 contacts →
	Indirect evidence “At PBCS Group, we believe that innovation has the power to unlock new opportunities for people and our planet.” Source: RevenueBase Database · checked Sep 13, 2026
20	Infomera LTD	Indirect evidence	Sofia, BulgariaHQ checked Sep 13, 2026	1-10	5 contacts →
	Indirect evidence “Infomera is a young enterprise, established to serve a growing market demand for quality expertise in the field of IT management and optimization.” Source: RevenueBase Database · checked Sep 13, 2026
21	NEW ERA	Indirect evidence	Sofia, BulgariaHQ checked Sep 13, 2026	1-10	5 contacts →
	Indirect evidence “Услугите на New Era са изцяло съобразени с нуждите на модерния бизнес и високо конкурентната бизнес среда в дигиталния свят.” Source: RevenueBase Database · checked Sep 13, 2026
22	Business Effect	Indirect evidence	Sofia, BulgariaHQ checked Sep 13, 2026	1-10	5 contacts →
	Indirect evidence “Ние, „Бизнес Ефект”, предоставяме услуги, насочени към организационно развитие и повишаване ефективността на бизнеса на нашите клиенти чрез консултиране и обучение.” Source: RevenueBase Database · checked Sep 13, 2026
23	Cotransition	Indirect evidence	Sofia, BulgariaHQ checked Sep 13, 2026	1-10	4 contacts →
	Indirect evidence “In other words, change is situational.” Source: RevenueBase Database · checked Sep 13, 2026
24	Business Adviser LTD	Indirect evidence	Sofia, BulgariaHQ checked Sep 13, 2026	1-10	4 contacts →
	Indirect evidence “Помагаме на бизнеса да подреди хаоса и се подготви за успеха.” Source: RevenueBase Database · checked Sep 13, 2026
25	Hedex Consulting	Partial evidence	Sofia, BulgariaHQ checked Sep 13, 2026	1-10	3 contacts →
	Partial evidence “Hedex Consulting is a team of professionals with 15+ years' experience in Microsoft Dynamics 365 consulting.” Source: RevenueBase Database · checked Sep 13, 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: transformation consulting 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 transformation consulting firms.
Partial evidence: Its own public description names part of transformation consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name transformation consulting 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 110 transformation consulting firms based in Sofia, Bulgaria

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Transformation consulting firms based in Sofia, Bulgaria at a glance

As of Sep 13, 2026

38.2%Verified-email coverage

1.2%Mobile-number coverage

12.6Average contacts per company

1-10Median size (employees)

109.1%Largest-city concentration · Sofia

Sep 13, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

10001+

Freshness & accuracy

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

Email last verified

Median 15.0d

4100–30

11231–60

161–90

090–180

6180+

Company record updated

Median 66.0d

00–30

65931–60

51061–90

14890–180

67180+

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 transformation consulting 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 Sofia, Bulgaria whose own description of what they do matches “transformation consulting 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 transformation consulting 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 transformation consulting firms, 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, 529 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 13, 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.

Transformation consulting firms by metro in Bulgaria

Transformation consulting firms in Sofia120

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 transformation consulting 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 transformation consulting firms are there based in Sofia, Bulgaria?

RevenueBase identified 110 transformation consulting firms 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?

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

Which city has the most transformation consulting firms?

Sofia leads with 120 headquartered companies, followed by Sofia City (11) and Plovdiv (8).

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 529 verified decision-maker contacts tracked across these 110 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 13, 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.