Company lists · Data verified August 2026

Top 11 Customer service outsourcing companies based in Bulgaria

Name: Customer service outsourcing companies based in Bulgaria
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 49 companies tracked

There are 49 customer service outsourcing companies headquartered in Bulgaria (RevenueBase, August 2026). RevenueBase tracks 1,497 professional contacts across them, including 243 with verified work emails and 10 with mobile numbers. Sofia is the largest hub.

This list covers customer service outsourcing companies headquartered in Bulgaria, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

49Companies

1,497Contacts tracked

243Verified emails

10Mobile numbers

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The 11 largest customer service outsourcing companies based in Bulgaria

Ranked by team size

Top 11 of 49 customer service outsourcing companies based in Bulgaria, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Sixty K LTD 60k	Plovdiv	1,001-5,000	396	2
2	Pontica Solutions	Varna	501-1,000	262	149
3	GMS Bulgaria	Sofia	51-200	59	23
4	Telus International Bulgaria	Sofia City	1,001-5,000	51	28
5	CXG Business Process Outsourcing	Sofia	51-200	51	26
6	Global Services Bulgaria JSC	Sofia	51-200	21	2
7	Markam Solutions	Sofia	51-200	15	7
8	An Allnew Tech LTD	Sofia	51-200	14	1
9	Tomi REN	Sofia	11-50	7	2
10	Zephyr Group Eood	Plovdiv	1-10	2	1
11	Bulgcom	Sofia City	1-10	1	1

Showing 11 of 49 customer service outsourcing companies based in Bulgaria

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Customer service outsourcing companies based in Bulgaria at a glance

As of Aug 28, 2026

11-50Median size (employees)

SofiaLargest hub · 26 HQs

10Contacts with mobile numbers

1Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Customer service outsourcing companies by metro

Metro	Companies
Customer service outsourcing companies in Sofia	26
Customer service outsourcing companies in Sofia City	7
Customer service outsourcing companies in Varna	5
Customer service outsourcing companies in Burgas	3
Customer service outsourcing companies in Plovdiv	2
Customer service outsourcing companies in Veliko Tarnovo	1
Customer service outsourcing companies in Petrich	1

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “customer service outsourcing companies”, with match quality audited by blind human judging, and headquartered in Bulgaria.
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: Contact records re-verify on a rolling cadence; 1 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many customer service outsourcing companies are there based in Bulgaria?

There are 49 customer service outsourcing companies headquartered in Bulgaria as of August 2026 (RevenueBase).

What is the largest company on this list?

Sixty K LTD 60k, headquartered in Plovdiv, tops this list with the largest team on record.

Which city has the most customer service outsourcing companies?

Sofia leads with 26 headquartered companies, followed by Sofia City (7) and Varna (5).

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 243 verified decision-maker contacts tracked across these 49 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.