Company lists · Data refreshed September 2026

Top 25 Telecom software developers worldwide

Name: Telecom software developers worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 2,454 companies tracked

RevenueBase identified 2,454 telecom software developers worldwide as of September 2026 and tracks 104,810 professional contacts across them, including 29,746 with verified work emails. India is the largest market and London the largest hub.

This list covers telecom software developers worldwide, 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 29, 2026. Country and city lists for telecom software developers follow the table.

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 29, 2026 86% judged on-target in blind review

2,454Companies

104,810Contacts tracked

29,746Verified emails

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The 25 largest telecom software developers worldwide

Ranked by team size

Top 25 of 2,454 telecom software developers worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to telecom software developers: 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	Amdocs	Indirect evidence	Chesterfield, MO, United StatesHQ checked Sep 29, 2026	10001+	39,863 contacts →
	Indirect evidence “Who are we?” Source: RevenueBase Database · checked Sep 29, 2026
2	CSG	Indirect evidence	Englewood, CO, United StatesHQ checked Sep 29, 2026	5,001-10,000	5,874 contacts →
	Indirect evidence “CSG is a leader in innovative customer engagement, revenue management and payments solutions that make ordinary customer experiences extraordinary.” Source: RevenueBase Database · checked Sep 29, 2026
3	Innova	Indirect evidence	İstanbul, TürkiyeHQ checked Sep 29, 2026	1,001-5,000	1,720 contacts →
	Indirect evidence “İnnova Bilişim Çözümleri A.Ş, farklı teknolojilerde bilgi birikimine sahip 1400 kişilik profesyonel kadrosu ile Türkiye’nin önde gelen bilişim çözümleri firmasıdır.” Source: RevenueBase Database · checked Sep 29, 2026
4	Tecnotree Corporation	Indirect evidence	Espoo, FinlandHQ checked Sep 29, 2026	501-1,000	1,226 contacts →
	Indirect evidence “Headquartered in Finland, Tecnotree Corporation was founded in 1978 and is the leading provider of full-stack Digital BSS for CSPs and DSPs.” Source: RevenueBase Database · checked Sep 29, 2026
5	Huawei Technologies India	Partial evidence	Bengaluru, IndiaHQ checked Sep 29, 2026	1,001-5,000	1,187 contacts →
	Partial evidence “Huawei Technologies India is the largest overseas software development center of Huawei, a leading global information and communications technology (ICT) solutions provider.” Source: RevenueBase Database · checked Sep 29, 2026
6	Circles	Indirect evidence	SingaporeHQ checked Sep 29, 2026	501-1,000	1,003 contacts →
	Indirect evidence “Founded in 2014, Circles is a global technology company reimagining the telco industry with its innovative SaaS platform, empowering telco operators worldwide to effortlessly…” Source: RevenueBase Database · checked Sep 29, 2026
7	Wds-Sicap	Partial evidence	Baar, SwitzerlandHQ checked Sep 29, 2026	n/a	777 contacts →
	Partial evidence “We are leading provider of telecom business intelligence and device management solutions.” Source: RevenueBase Database · checked Sep 29, 2026
8	Qvantel	Strong evidence	Helsinki, FinlandHQ checked Sep 29, 2026	501-1,000	651 contacts →
	Strong evidence “Qvantel, established in 1995, is a leading provider of digital BSS and monetization software to the telecommunications and digital services industries.” Source: RevenueBase Database · checked Sep 29, 2026
9	Advanced Communications & Electronics Systems Company	Indirect evidence	Riyadh, Saudi ArabiaHQ checked Sep 29, 2026	1,001-5,000	513 contacts →
	Indirect evidence “Advanced Communications & Electronic Systems Company is a multi-faceted enterprise with a particular focus on developing and distributing total solutions in the area of…” Source: RevenueBase Database · checked Sep 29, 2026
10	FTS	Partial evidence	Or Yehuda, IsraelHQ checked Sep 29, 2026	51-200	494 contacts →
	Partial evidence “FTS works with telecommunications, content and payment service providers globally to help them manage complex transactions and relationships with greater flexibility and greater…” Source: RevenueBase Database · checked Sep 29, 2026
11	Excelacom Technologies	Partial evidence	Chennai, IndiaHQ checked Sep 29, 2026	201-500	423 contacts →
	Partial evidence “ExcelaCom Technologies is an independent software vendor, offering BSS/OSS solutions and services to Tier 1 to Tier 3 NGN communications players across multiple geographies.” Source: RevenueBase Database · checked Sep 29, 2026
12	Behpardaz Hamrah Samaneh Aval Behsa	Indirect evidence	Tehran, IranHQ checked Sep 29, 2026	501-1,000	423 contacts →
	Indirect evidence “BEHSA (Behpardaz Hamrah Samaneh Aval) Corp.” Source: RevenueBase Database · checked Sep 29, 2026
13	I2i Systems	Indirect evidence	Esenler, TürkiyeHQ checked Sep 29, 2026	201-500	402 contacts →
	Indirect evidence “i2i Systems is an international information technology company that specializes in developing innovative ideas and solutions.” Source: RevenueBase Database · checked Sep 29, 2026
14	Cerillion Technologies	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	201-500	364 contacts →
	Strong evidence “Cerillion is a leading provider of BSS/OSS software for the telecommunications industry, with over 25 years’ experience supporting mobile, fixed, cable and multi-service operators…” Source: RevenueBase Database · checked Sep 29, 2026
15	Eskadenia Software	Partial evidence	Amman, JordanHQ checked Sep 29, 2026	201-500	361 contacts →
	Partial evidence “ESKADENIA Software is committed to continuously enrich its product offerings and create advanced software products according to market demands.” Source: RevenueBase Database · checked Sep 29, 2026
16	XIUS	Partial evidence	Hyderabad, IndiaHQ checked Sep 29, 2026	201-500	361 contacts →
	Partial evidence “For 25 years, XIUS has been at the forefront of telecom innovation designing intelligent, secure, and future-ready network infrastructure for operators and enterprises across five…” Source: RevenueBase Database · checked Sep 29, 2026
17	Ecosmob Technologies	Partial evidence	Ahmedabad, IndiaHQ checked Sep 29, 2026	201-500	358 contacts →
	Partial evidence “Your preferred partner for custom software development and technology outsourcing.” Source: RevenueBase Database · checked Sep 29, 2026
18	Netxcell Limited	Partial evidence	Hyderabad, IndiaHQ checked Sep 29, 2026	201-500	347 contacts →
	Partial evidence “Netxcell Limited is a pioneer in the telecom sector, with a collective vision: To cater to the global emerging and demanding trends in wireless technology.” Source: RevenueBase Database · checked Sep 29, 2026
19	PCT International, INC	Partial evidence	Tempe, AZ, United StatesHQ checked Sep 29, 2026	201-500	344 contacts →
	Partial evidence “Innovation for the Last Mile® PCT International, Inc is at the forefront of an evolving industry with superior telecom solutions.” Source: RevenueBase Database · checked Sep 29, 2026
20	Reve Systems	Partial evidence	SingaporeHQ checked Sep 29, 2026	201-500	344 contacts →
	Partial evidence “Founded in 2003, today REVE Systems is a global software solutions provider leading in Class 4 & Class 5 Softswitch, Voice, Video & Messaging App, SMS Platform, Cloud Contact…” Source: RevenueBase Database · checked Sep 29, 2026
21	Optiva INC	Strong evidence	Mississauga, ON, CanadaHQ checked Sep 29, 2026	201-500	328 contacts →
	Strong evidence “Optiva, a Qvantel company, is a leading provider of digital BSS and monetization software to the telecommunications and digital services industries.” Source: RevenueBase Database · checked Sep 29, 2026
22	Seavus	Partial evidence	Lund, SwedenHQ checked Sep 29, 2026	1,001-5,000	328 contacts →
	Partial evidence “Seavus®, part of Aricoma Group, is a software development and consulting company with a proven track record in providing successful enterprise-wide business solutions.” Source: RevenueBase Database · checked Sep 29, 2026
23	Nmsworks Software	Strong evidence	Chennai, IndiaHQ checked Sep 29, 2026	201-500	328 contacts →
	Strong evidence “NMSWorks Software delivers OSS and BSS solutions to some of the largest and most demanding telecom service providers, network equipment vendors and enterprises.” Source: RevenueBase Database · checked Sep 29, 2026
24	Informatics	Indirect evidence	Colombo, Sri LankaHQ checked Sep 29, 2026	201-500	307 contacts →
	Indirect evidence “An Information Technology Company with a backing of nearly four decades worth of experience.” Source: RevenueBase Database · checked Sep 29, 2026
25	MADA	Partial evidence	Geneva, SwitzerlandHQ checked Sep 29, 2026	51-200	270 contacts →
	Partial evidence “Mada is a telecoms solutions provider with offices in Europe, the Americas, the Middle East, Africa and Southeast Asia.” Source: RevenueBase Database · checked Sep 29, 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: telecom software developers. 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 telecom software developers.
Partial evidence: Its own public description names part of telecom software developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name telecom software developers. 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 2,454 telecom software developers worldwide

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Telecom software developers worldwide at a glance

As of Sep 29, 2026

28.4%Verified-email coverage

42.7Average contacts per company

11-50Median size (employees)

1.4%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

836

11-50

1,012

51-200

410

201-500

120

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 telecom software developers, 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.
Coverage: Every country. Country and city lists for telecom software developers are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “telecom software developers”. 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 telecom software developers), 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 telecom software developers, and records with no verified work email.
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, 29,746 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 29, 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.

Telecom software developers by location

18 lists · largest first

Every Telecom software developers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Telecom software developers based in London, United Kingdom34

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 telecom software developers, 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 telecom software developers are there worldwide?

RevenueBase identified 2,454 telecom software developers worldwide 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?

Amdocs, headquartered in Chesterfield, tops this list with the largest team on record.

Which country has the most telecom software developers?

India leads with 251 companies, followed by the United States (235) and Brazil (145). Every telecom software developers list by country and city is linked on this page.

Which city has the most telecom software developers?

London leads with 34 headquartered companies, followed by Istanbul (26) and Sao Paulo (26).

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 29,746 verified decision-maker contacts tracked across these 2,454 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 29, 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.