Company lists · Data refreshed September 2026

Top 25 Custom software development consulting firms worldwide

Name: Custom software development consulting firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 86,473 companies tracked

RevenueBase identified 86,473 custom software development consulting firms worldwide as of September 2026 and tracks 1,235,563 professional contacts across them, including 363,176 with verified work emails and 79,110 with mobile numbers. The United States is the largest market and London the largest hub.

This list covers custom software development consulting firms 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 24, 2026. Country and city lists for custom software development consulting firms 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 24, 2026 86% judged on-target in blind review

86,473Companies

1,235,563Contacts tracked

363,176Verified emails

79,110Mobile numbers

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The 25 largest custom software development consulting firms worldwide

Ranked by team size

Top 25 of 86,473 custom software development consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to custom software development 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	Telus Digital	Partial evidence	Vancouver, BC, CanadaHQ checked Sep 24, 2026	10001+	38,300 contacts →
	Partial evidence “TELUS Digital crafts unique and enduring experiences for customers and employees, and creates future-focused digital transformations that stand the test of time.” Source: RevenueBase Database · checked Sep 24, 2026
2	Globallogic	Indirect evidence	Santa Clara, CA, United StatesHQ checked Sep 24, 2026	10001+	30,977 contacts →
	Indirect evidence “GlobalLogic, a Hitachi Group company, is a trusted partner in design, data, and digital engineering for the world’s largest and most innovative companies.” Source: RevenueBase Database · checked Sep 24, 2026
3	Softtek	Strong evidence	Monterrey, MexicoHQ checked Sep 24, 2026	10001+	13,490 contacts →
	Strong evidence “At Softtek, we drive the strategic development of our clients through software engineering.” Source: RevenueBase Database · checked Sep 24, 2026
4	CDW	Indirect evidence	Vernon Hills, IL, United StatesHQ checked Sep 24, 2026	10001+	13,155 contacts →
	Indirect evidence “At CDW, we know how to make technology work so people can do great things.” Source: RevenueBase Database · checked Sep 24, 2026
5	Luxoft	Strong evidence	Zug, SwitzerlandHQ checked Sep 24, 2026	10001+	11,471 contacts →
	Strong evidence “Luxoft, a DXC Technology Company (NYSE: DXC), is a digital strategy and software engineering firm providing bespoke technology solutions that drive business change for customers…” Source: RevenueBase Database · checked Sep 24, 2026
6	Endava	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	10001+	9,653 contacts →
	Indirect evidence “For over two decades, we have been harnessing technology to drive meaningful change.” Source: RevenueBase Database · checked Sep 24, 2026
7	R Systems	Partial evidence	El Dorado Hills, CA, United StatesHQ checked Sep 24, 2026	5,001-10,000	7,360 contacts →
	Partial evidence “RSI is a trusted software engineering and digital transformation services partner to global enterprises navigating technological change.” Source: RevenueBase Database · checked Sep 24, 2026
8	Libera Professione	Indirect evidence	Calenzano, ItalyHQ checked Sep 24, 2026	n/a	5,871 contacts →
	Indirect evidence “Consulenza Informatica, sviluppo applicazioni client-server su piattaforma FileMaker, interfacciamento applicativi SQL, Oracle, DB2, AS400, MySql, MS SQL, MS Access.” Source: RevenueBase Database · checked Sep 24, 2026
9	Epicor	Indirect evidence	Austin, TX, United StatesHQ checked Sep 24, 2026	1,001-5,000	5,802 contacts →
	Indirect evidence “We’re here for the hard-working businesses that keep the world turning.” Source: RevenueBase Database · checked Sep 24, 2026
10	Hitss Brasil	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 24, 2026	5,001-10,000	5,546 contacts →
	Indirect evidence “Somos uma empresa do Grupo América Móvil com mais de 30 anos de experiência na indústria de Tecnologia da Informação e Transformação Digital, contamos com mais de especialistas em…” Source: RevenueBase Database · checked Sep 24, 2026
11	SII Poland	Partial evidence	Warszawa, PolandHQ checked Sep 24, 2026	5,001-10,000	5,519 contacts →
	Partial evidence “With over 7 500 Power People, Sii is Poland’s #1 partner for technology consulting, AI-driven digital transformation, engineering, and business services, empowering companies to…” Source: RevenueBase Database · checked Sep 24, 2026
12	Adesso SE	Indirect evidence	Dortmund, GermanyHQ checked Sep 24, 2026	5,001-10,000	5,332 contacts →
	Indirect evidence “The future belongs to companies that effectively translate agentic AI into value creation.” Source: RevenueBase Database · checked Sep 24, 2026
13	Dataart	Partial evidence	New York, NY, United StatesHQ checked Sep 24, 2026	5,001-10,000	5,249 contacts →
	Partial evidence “DataArt is a global software engineering firm that delivers breakthrough data, analytics, and AI platforms for the world’s most demanding organizations.” Source: RevenueBase Database · checked Sep 24, 2026
14	Groupe SII	Indirect evidence	Paris, FranceHQ checked Sep 24, 2026	10001+	4,928 contacts →
	Indirect evidence “Le groupe SII est une société d’ingénierie et de conseil en technologies (ICT) et une entreprise de services numériques (ESN) créée en 1979 par Bernard HUVÉ, ingénieur de…” Source: RevenueBase Database · checked Sep 24, 2026
15	Amaris Consulting	Partial evidence	Chêne-bourg, SwitzerlandHQ checked Sep 24, 2026	5,001-10,000	4,824 contacts →
	Partial evidence “Amaris Consulting is an independent technology consulting firm providing guidance and solutions to businesses.” Source: RevenueBase Database · checked Sep 24, 2026
16	Software AG	Partial evidence	Darmstadt, GermanyHQ checked Sep 24, 2026	n/a	4,127 contacts →
	Partial evidence “Software AG has been helping enterprises run and evolve their core business applications for over 50 years.” Source: RevenueBase Database · checked Sep 24, 2026
17	Presidio	Indirect evidence	New York, NY, United StatesHQ checked Sep 24, 2026	1,001-5,000	3,798 contacts →
	Indirect evidence “At Presidio, speed and quality meet technology and innovation.” Source: RevenueBase Database · checked Sep 24, 2026
18	Andersen LAB	Strong evidence	Warsaw, PolandHQ checked Sep 24, 2026	1,001-5,000	3,628 contacts →
	Strong evidence “Andersen – your global software development partner Andersen is a global software development company with over 18 years of experience supporting businesses worldwide in their…” Source: RevenueBase Database · checked Sep 24, 2026
19	Iris Software INC	Partial evidence	Edison, NJ, United StatesHQ checked Sep 24, 2026	1,001-5,000	3,421 contacts →
	Partial evidence “Iris Software has been a trusted software engineering partner to several Fortune 500 companies for over three decades.” Source: RevenueBase Database · checked Sep 24, 2026
20	META	Indirect evidence	São Paulo, BrazilHQ checked Sep 24, 2026	1,001-5,000	2,952 contacts →
	Indirect evidence “Meta is now Insi!” Source: RevenueBase Database · checked Sep 24, 2026
21	Chetu, INC	Partial evidence	Sunrise, FL, United StatesHQ checked Sep 24, 2026	1,001-5,000	2,943 contacts →
	Partial evidence “Chetu is your seamless backend technology partner, helping startups, SMBs, and Fortune companies accelerate development of desktop, mobile, and web apps with on-demand developers…” Source: RevenueBase Database · checked Sep 24, 2026
22	Praxis	Strong evidence	MexicoHQ checked Sep 24, 2026	1,001-5,000	2,763 contacts →
	Strong evidence “Praxis is a company devoted to integration, consulting, nearshoring and software development.” Source: RevenueBase Database · checked Sep 24, 2026
23	Computer Futures	Indirect evidence	London, United KingdomHQ checked Sep 24, 2026	501-1,000	2,673 contacts →
	Indirect evidence “Building tomorrow’s tech landscape together Computer Futures is a Technology specialist, part of SThree, the global STEM workforce consultancy.” Source: RevenueBase Database · checked Sep 24, 2026
24	HSO	Indirect evidence	Amsterdam, JapanHQ checked Sep 24, 2026	1,001-5,000	2,600 contacts →
	Indirect evidence “We help companies modernize business operations, adopt intelligent automation, deliver real-time performance insights and connect the enterprise – accelerating the impact of…” Source: RevenueBase Database · checked Sep 24, 2026
25	People Tech Group INC	Indirect evidence	Redmond, WA, United StatesHQ checked Sep 24, 2026	1,001-5,000	2,434 contacts →
	Indirect evidence “People Tech Group is a leading Enterprise Solutions, Digital Transformation, Data Intelligence, and Modern Operation services provider.” Source: RevenueBase Database · checked Sep 24, 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: custom software development 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 custom software development consulting firms.
Partial evidence: Its own public description names part of custom software development consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name custom software development 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 86,473 custom software development consulting firms worldwide

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Custom software development consulting firms worldwide at a glance

As of Sep 24, 2026

29.4%Verified-email coverage

6.4%Mobile-number coverage

14.3Average contacts per company

1-10Median size (employees)

3.6%Largest-city concentration · London

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

55,941

11-50

27,685

51-200

8,380

201-500

1,720

501-1,000

564

1,001-5,000

328

5,001-10,000

10001+

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 custom software development 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.
Coverage: 47 countries, largest first: the United States, the United Kingdom, Brazil, Germany, Canada, France, Italy, Australia, Spain, the Netherlands and 37 more. Country and city lists for custom software development consulting firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “custom software development 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 custom software development 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 custom software development consulting firms, 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, 363,176 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 24, 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.

Custom software development consulting firms by location

451 lists · largest first

Every Custom software development consulting firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 custom software development 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 custom software development consulting firms are there worldwide?

RevenueBase identified 86,473 custom software development consulting firms 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?

Telus Digital, headquartered in Vancouver, tops this list with the largest team on record.

Which country has the most custom software development consulting firms?

The United States leads with 19,358 companies, followed by the United Kingdom (8,253) and Brazil (7,044). Every custom software development consulting firms list by country and city is linked on this page.

Which city has the most custom software development consulting firms?

London leads with 3154 headquartered companies, followed by Sao Paulo (1602) and New York (1174).

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 363,176 verified decision-maker contacts tracked across these 86,473 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 24, 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.