Company lists · Data refreshed September 2026

Top 25 IT systems integration firms based in Bulgaria

Name: IT systems integration firms based in Bulgaria
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 86 companies tracked

RevenueBase identified 86 IT systems integration firms headquartered in Bulgaria as of September 2026 and tracks 1,292 professional contacts across them, including 381 with verified work emails. Sofia is the largest hub.

This list covers IT systems integration firms headquartered in 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

86Companies

1,292Contacts tracked

381Verified emails

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The 25 largest IT systems integration firms based in Bulgaria

Ranked by team size

Top 25 of 86 IT systems integration firms based in Bulgaria, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to IT systems integration 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	Kontrax	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	201-500	126 contacts →
	Indirect evidence “Kontrax Company was established in 1992 as an international holding of companies in six East European countries and headquarters in Budapest, Hungary.” Source: RevenueBase Database · checked Sep 28, 2026
2	Bright	Partial evidence	Sofia, BulgariaHQ checked Sep 28, 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 28, 2026
3	Cnsys PLC	Strong evidence	Sofia, BulgariaHQ checked Sep 28, 2026	51-200	121 contacts →
	Strong 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
4	IBS Bulgaria	Strong evidence	Sofia, BulgariaHQ checked Sep 28, 2026	51-200	89 contacts →
	Strong evidence “IBS Bulgaria is an IT Consulting, Systems Integrator and Software Development company founded in Bulgaria.” Source: RevenueBase Database · checked Sep 28, 2026
5	Paraflow Communications	Partial evidence	Studentski, BulgariaHQ checked Sep 28, 2026	51-200	85 contacts →
	Partial evidence “Paraflow Communications is a leading Bulgarian IT company with over 30 years of experience.” Source: RevenueBase Database · checked Sep 28, 2026
6	Comsoft	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	11-50	69 contacts →
	Indirect evidence “COMSOFT Ltd is committed to integrity, loyalty and service quality as key issues in its business.” Source: RevenueBase Database · checked Sep 28, 2026
7	Enterprise Communications Group	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	51-200	36 contacts →
	Indirect evidence “Enterprise Communications Group Ltd.(founded in 2006 as Siemens Enterprise Communications Ltd.) is a leading integrator of the latest information and communication technologies.” Source: RevenueBase Database · checked Sep 28, 2026
8	BGS	Partial evidence	Sofia, BulgariaHQ checked Sep 28, 2026	11-50	28 contacts →
	Partial evidence “We are a Business to Business (B2B) IT Services provider.” Source: RevenueBase Database · checked Sep 28, 2026
9	Sirma Insurtech	Partial evidence	Sofia, BulgariaHQ checked Sep 28, 2026	51-200	21 contacts →
	Partial 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
10	Syscom Engineering	Indirect evidence	София, BulgariaHQ checked Sep 28, 2026	51-200	19 contacts →
	Indirect evidence “Сиском Инженеринг е утвърдена българска компания с 16-годишен опит в системната интеграция и внедряването на иновативни технологични решения.” Source: RevenueBase Database · checked Sep 28, 2026
11	IFD Engineering Joint Venture	Partial evidence	Sofia, BulgariaHQ checked Sep 28, 2026	11-50	17 contacts →
	Partial 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
12	Ssarm LTD	Strong evidence	Sofia, BulgariaHQ checked Sep 28, 2026	11-50	14 contacts →
	Strong evidence “Meet SSARM - the fast growing IT, network, and security solutions system integrator focused on turnkey project delivery, professional and managed services.” Source: RevenueBase Database · checked Sep 28, 2026
13	Computer Aided Design Research And Development Centre Progress	Partial evidence	Sofia, BulgariaHQ checked Sep 28, 2026	51-200	13 contacts →
	Partial 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
14	Gluckit LTD	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	11-50	12 contacts →
	Indirect evidence “We at believe we revolutionize business by providing solutions and improving work performance, reducing operating expenses and ensuring a quick reaction to the clients' changing…” Source: RevenueBase Database · checked Sep 28, 2026
15	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
16	Quantum Omega Group	Indirect evidence	Sofia, BulgariaHQ checked Sep 28, 2026	51-200	11 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
17	Rconsulting	Partial evidence	Sofia, BulgariaHQ checked Sep 28, 2026	11-50	11 contacts →
	Partial 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
18	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
19	L E A D V I S I O N	Indirect evidence	Lozenets, BulgariaHQ checked Sep 28, 2026	11-50	9 contacts →
	Indirect evidence “Lead Vision Ltd.” Source: RevenueBase Database · checked Sep 28, 2026
20	IT Services Bulgaria	Partial evidence	Sofia, BulgariaHQ checked Sep 28, 2026	11-50	9 contacts →
	Partial evidence “IT Services Bulgaria specializes in providing reliable and innovative business-oriented IT solutions and services.” Source: RevenueBase Database · checked Sep 28, 2026
21	Risk Electronics LTD	Partial evidence	Sofia, BulgariaHQ checked Sep 28, 2026	11-50	9 contacts →
	Partial evidence “System integrator with partnerships with Lenovo, Huawei, Intel, Supermicro, Philips, Samsung, LG.” Source: RevenueBase Database · checked Sep 28, 2026
22	2 Plus Bulgaria AD	Partial evidence	Burgas, BulgariaHQ checked Sep 28, 2026	11-50	8 contacts →
	Partial evidence “2 PLUS BULGARIA is a SYSTEM INTEGRATOR providing modern high-tech solutions.” Source: RevenueBase Database · checked Sep 28, 2026
23	Enterprise SDS	Strong evidence	Varna, BulgariaHQ checked Sep 28, 2026	1-10	6 contacts →
	Strong evidence “Being an Eastern European IT provider and software developer since 2009, we have experience in creating complex integrated systems.” Source: RevenueBase Database · checked Sep 28, 2026
24	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
25	IT Works	Strong evidence	Sofia City, BulgariaHQ checked Sep 28, 2026	11-50	5 contacts →
	Strong evidence “As a trusted system integrator, IT Works specializes in delivering comprehensive IT solutions that empower organizations to thrive in the digital era.” 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: IT systems integration 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 IT systems integration firms.
Partial evidence: Its own public description names part of IT systems integration firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT systems integration 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 86 IT systems integration firms based in Bulgaria

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IT systems integration firms based in Bulgaria at a glance

As of Sep 28, 2026

29.5%Verified-email coverage

15.0Average contacts per company

11-50Median size (employees)

60.5%Largest-city concentration · Sofia

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured worldwide rather than for Bulgaria, so it is reported there. Company counts and contact totals on this page are exact for Bulgaria, over 86 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 IT systems integration 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 Bulgaria whose own description of what they do matches “IT systems integration 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 IT systems integration 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 IT systems integration firms, and records with no verified work email. Companies headquartered outside Bulgaria 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, 381 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.

IT systems integration firms by metro

IT systems integration firms in Sofia52

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 IT systems integration 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 IT systems integration firms are there based in Bulgaria?

RevenueBase identified 86 IT systems integration firms headquartered in 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?

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

Which city has the most IT systems integration firms?

Sofia leads with 52 headquartered companies, followed by Sofia City (5) and Plovdiv (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 381 verified decision-maker contacts tracked across these 86 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.