Company lists · Data refreshed September 2026

Top 25 Business systems integration companies based in Sofia, Bulgaria

Name: Business systems integration companies based in Sofia, Bulgaria
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 71 companies tracked

RevenueBase identified 71 business systems integration companies headquartered in Sofia, Bulgaria as of September 2026 and tracks 830 professional contacts across them, including 276 with verified work emails. Across Bulgaria, Sofia is the largest hub for this category.

This list covers business systems integration companies 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 28, 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 28, 2026 86% judged on-target in blind review

71Companies

830Contacts tracked

276Verified emails

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The 25 largest business systems integration companies based in Sofia, Bulgaria

Ranked by team size

Top 25 of 71 business systems integration companies based in Sofia, Bulgaria, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to business systems integration 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	Bright	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	51-200	126 contacts →
	Indirect 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 28, 2026
2	Cnsys PLC	Partial evidence	Sofia, BulgariaHQ checked Sep 28, 2026	51-200	121 contacts →
	Partial evidence “Founded in 1998 in Sofia as an start-up expert company, nowadays CNSYS PLC is one of Bulgaria’s top five system integrators in terms of revenue, IT experience and successful…” Source: RevenueBase Database · checked Sep 28, 2026
3	Haemimont AD	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	11-50	64 contacts →
	Indirect evidence “Haemimont specializes in the design and development of turnkey enterprise-level custom software applications targeted at company-specific needs.” Source: RevenueBase Database · checked Sep 28, 2026
4	Balkan Services	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 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 28, 2026
5	SM Consulta LTD	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	11-50	49 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
6	BL Consulting LTD	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	n/a	43 contacts →
	Indirect evidence “BL Consulting Ltd is a high-tech consulting company.” Source: RevenueBase Database · checked Sep 28, 2026
7	BGS	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	11-50	28 contacts →
	Indirect evidence “We are a Business to Business (B2B) IT Services provider.” Source: RevenueBase Database · checked Sep 28, 2026
8	Sirma Insurtech	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	51-200	21 contacts →
	Indirect evidence “Еstablished in 2002 as IT consulting firm TBI Info, nowdays Sirma InsurTech is an IT consulting firm – a recognized expert in the development and implementation of business…” Source: RevenueBase Database · checked Sep 28, 2026
9	IFD Engineering Joint Venture	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	11-50	17 contacts →
	Indirect evidence “IFD Engineering LTD – projects for warehouse automation, trade, production and services under one roof – effective and powerful IT solutions that work for you.” Source: RevenueBase Database · checked Sep 28, 2026
10	Computer Aided Design Research And Development Centre Progress	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	51-200	13 contacts →
	Indirect evidence “CAD R&D CENTRE PROGRESS GROUP is a leading Bulgarian company with 40 years of experience in IT sector.” Source: RevenueBase Database · checked Sep 28, 2026
11	erp.bg	Partial evidence	Sofia, BulgariaHQ checked Sep 28, 2026	11-50	13 contacts →
	Partial evidence “ERP.BG is a Bulgarian developer of Business Management Systems with over 25 years of experience in the development, implementation and maintenance of such solutions.” Source: RevenueBase Database · checked Sep 28, 2026
12	Innovasys LTD	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	11-50	12 contacts →
	Indirect evidence “Innovasys Ltd is a software company established in 2005 by highly qualified specialists who made their occupation a lifestyle.” Source: RevenueBase Database · checked Sep 28, 2026
13	Quantum Omega Group	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	51-200	11 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
14	ITC Consult LTD	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	11-50	11 contacts →
	Indirect evidence “ITC Consult is a consulting company with over 18 years of experience in the implementation, support, and development of business software in the ERP, CRM, and BI categories.” Source: RevenueBase Database · checked Sep 28, 2026
15	Rconsulting	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	11-50	11 contacts →
	Indirect evidence “R Consulting is an IT company, established in 1993, which operates officially since 2003 under the trademark of R Consulting Ltd.” Source: RevenueBase Database · checked Sep 28, 2026
16	Data Solutions LTD	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	1-10	10 contacts →
	Indirect evidence “Established in 2002, Data Solutions Ltd.” Source: RevenueBase Database · checked Sep 28, 2026
17	C-Trust	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 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 28, 2026
18	Opsters	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	11-50	6 contacts →
	Indirect evidence “Opsters is here to futureproof your operations.” Source: RevenueBase Database · checked Sep 28, 2026
19	Ibsolution Bulgaria	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 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 28, 2026
20	Simantech	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	11-50	5 contacts →
	Indirect evidence “We are dedicated to assisting organisations in setting up their engineering processes by providing solutions for highly specialised markets and industries as one of our core…” Source: RevenueBase Database · checked Sep 28, 2026
21	Pbcs Group	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 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 28, 2026
22	Auto3p Bulgaria	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	11-50	5 contacts →
	Indirect evidence “Ривокси e фирма, ориентирана към разработването и внедряването на иновационни решения в областта на информационните технологии.” Source: RevenueBase Database · checked Sep 28, 2026
23	Kondevs	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence “Where Services Meet Data and Synergy Sparks Success: EAI and AI- Founded in 2015, KONDEVS Ltd.” Source: RevenueBase Database · checked Sep 28, 2026
24	Network Media Solutions	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence “IT Services and IT Consulting” Source: RevenueBase Database · checked Sep 28, 2026
25	Index-Bulgaria LTD	Strong evidence	Sofia, BulgariaHQ checked Sep 28, 2026	51-200	3 contacts →
	Strong evidence “Main trends of „Index Bulgaria” activities: System integration, delivery, installation and service of computer equipment by world leading manufacturers.” Source: RevenueBase Database · checked Sep 28, 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: business systems integration 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 business systems integration companies.
Partial evidence: Its own public description names part of business systems integration companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name business systems integration 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 71 business systems integration companies based in Sofia, Bulgaria

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Business systems integration companies based in Sofia, Bulgaria at a glance

As of Sep 28, 2026

33.3%Verified-email coverage

11.7Average contacts per company

11-50Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole Bulgaria list rather than for Sofia, so it is reported there. Company counts and contact totals on this page are exact for Sofia, over 71 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 business systems integration 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 Sofia, Bulgaria whose own description of what they do matches “business systems integration 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 business systems integration 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 business systems integration companies, 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, 276 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 28, 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.

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 business systems integration 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 business systems integration companies are there based in Sofia, Bulgaria?

RevenueBase identified 71 business systems integration companies 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?

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

Which city in Bulgaria has the most business systems integration companies?

Sofia leads Bulgaria with 71 headquartered companies, followed by Plovdiv (12) and Sofia City (7).

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 276 verified decision-maker contacts tracked across these 71 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 28, 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.