Company lists · Data refreshed September 2026

Top 25 Software development services companies based in France

Name: Software development services companies based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 3,161 companies tracked

RevenueBase identified 3,161 software development services companies headquartered in France as of September 2026 and tracks 46,717 professional contacts across them, including 15,889 with verified work emails and 1,250 with mobile numbers. Paris is the largest hub.

This list covers software development services companies headquartered in France, 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 6, 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 6, 2026 86% judged on-target in blind review

3,161Companies

46,717Contacts tracked

15,889Verified emails

1,250Mobile numbers

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The 25 largest software development services companies based in France

Ranked by team size

Top 25 of 3,161 software development services companies based in France, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to software development services 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	Groupe SII	Indirect evidence	Paris, FranceHQ checked Sep 6, 2026	10001+	4,928 contacts →
	“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: company website · checked Sep 6, 2026
2	Keyrus	Indirect evidence	Levallois-perret, FranceHQ checked Sep 6, 2026	1,001-5,000	1,964 contacts →
	“At Keyrus, we help organizations move from experimental AI to industrialized AI, from isolated agents to orchestrated systems, and from insight to execution.” Source: company website · checked Sep 6, 2026
3	IGA	Indirect evidence	Malakoff, FranceHQ checked Sep 6, 2026	n/a	1,530 contacts →
	“Métiers - Edition de composants/modules logiciels pour les métiers de l’assurance, du voyage et du négoce- Création de solutions spécifiques pour le compte des clients- Suivi et…” Source: company website · checked Sep 6, 2026
4	Prodware	Indirect evidence	Paris, FranceHQ checked Sep 6, 2026	1,001-5,000	1,394 contacts →
	“At Prodware, we believe that Trust, Audacity, and Passion are the driving forces behind meaningful digital transformation.” Source: company website · checked Sep 6, 2026
5	SMILE	Indirect evidence	Asnières Sur Seine, FranceHQ checked Sep 6, 2026	1,001-5,000	1,352 contacts →
	“We are Technology experts & Business partners.” Source: company website · checked Sep 6, 2026
6	SFEIR	Indirect evidence	Neuilly-sur-seine, FranceHQ checked Sep 6, 2026	501-1,000	904 contacts →
	“SFEIR est une Société d’expertise spécialisée dans le développement d’applications sous toutes leurs formes ( web, mobile, IOT, cloud, data, etc.).” Source: company website · checked Sep 6, 2026
7	Catamania	Indirect evidence	Saint-herblain, FranceHQ checked Sep 6, 2026	1,001-5,000	696 contacts →
	“Depuis plus de 25 ans, Catamania fait partie des Entreprises de Services du Numérique dynamiques et innovantes qui s’appuie sur ses expertises métiers, techniques et…” Source: company website · checked Sep 6, 2026
8	Intalio	Indirect evidence	Fontenay-sous-bois, FranceHQ checked Sep 6, 2026	501-1,000	586 contacts →
	“With more than 30 years of expertise in the industry, Intalio -(previously known as Everteam Global Services) aims at accelerating an organization’s business evolution by offering…” Source: company website · checked Sep 6, 2026
9	Klanik	Indirect evidence	Marseille, FranceHQ checked Sep 6, 2026	501-1,000	585 contacts →
	“KLANIK is a consulting company specialized in IT Engineering which accompanies its partners in their digital and technological projects.” Source: company website · checked Sep 6, 2026
10	CELAD	Partial evidence	Toulouse, FranceHQ checked Sep 6, 2026	1,001-5,000	570 contacts →
	“Consulting and Engineering in innovative technology Celad is a global software engineering company with over 1200 engineers.” Source: company website · checked Sep 6, 2026
11	Sully Group	Indirect evidence	Saint-priest, FranceHQ checked Sep 6, 2026	501-1,000	560 contacts →
	“Sully Group : Working together to create a useful and sustainable digital environment > 1 global digital services offering: Business Applications, Mobile Applications…” Source: company website · checked Sep 6, 2026
12	DCS Easyware	Indirect evidence	Lyon, FranceHQ checked Sep 6, 2026	1,001-5,000	532 contacts →
	“Filiale du Groupe SYNERGIE, DCS SYNERGIE GROUP capitalise sur son histoire pour accompagner chaque jour les enjeux IT de ses clients.” Source: company website · checked Sep 6, 2026
13	Objectware	Indirect evidence	Paris, FranceHQ checked Sep 6, 2026	501-1,000	395 contacts →
	“Objectware Group is an IT Services Company (or ESN: Entreprise de Services du Numérique), founded in and dedicated to consulting and IT system engineering.” Source: company website · checked Sep 6, 2026
14	Ataway	Indirect evidence	Paris, FranceHQ checked Sep 6, 2026	201-500	394 contacts →
	“Ataway is a global consulting company supporting organizations across industries, with over 25 years of experience and presence in more than 23 countries.” Source: company website · checked Sep 6, 2026
15	Noveo Group	Partial evidence	Paris, FranceHQ checked Sep 6, 2026	501-1,000	327 contacts →
	“The Noveo group has specialized in design, development and maintenance of digital solutions since 1998.” Source: company website · checked Sep 6, 2026
16	Avanquest	Partial evidence	Courbevoie, FranceHQ checked Sep 6, 2026	201-500	315 contacts →
	“At Avanquest, we develop software that makes digital simpler, smarter and more useful.” Source: company website · checked Sep 6, 2026
17	Amiltone	Indirect evidence	Villeurbanne, FranceHQ checked Sep 6, 2026	201-500	314 contacts →
	“Bienvenue chez Amiltone.” Source: company website · checked Sep 6, 2026
18	Infogene	Indirect evidence	Neuilly-sur-seine, FranceHQ checked Sep 6, 2026	501-1,000	291 contacts →
	“INFOGENE est une ESN spécialisée dans 3 domaines principaux (en AMOA et MOE): DIGITAL: Notre savoir faire : Conseil, architecture logiciel, conception, développement, maintenance…” Source: company website · checked Sep 6, 2026
19	Kaizen Solutions KZS	Indirect evidence	Montbonnot-saint-martin, FranceHQ checked Sep 6, 2026	201-500	261 contacts →
	“Nous sommes une ESN (entreprise de services numériques) spécialisée dans la conception, le développement et la maintenabilité de solutions informatiques, techniques et…” Source: company website · checked Sep 6, 2026
20	Ouidou	Indirect evidence	Paris, FranceHQ checked Sep 6, 2026	201-500	252 contacts →
	“Fondée en 2017, Ouidou est une entreprise de services du numérique regroupant plus de 250 collaborateurs.” Source: company website · checked Sep 6, 2026
21	Atol CD	Indirect evidence	Gevrey-chambertin, FranceHQ checked Sep 6, 2026	201-500	233 contacts →
	“Misant sur l’innovation numérique pour accompagner ses clients dans le développement de leur compétitivité, ATOL CD conçoit et développe des applications métier au profit…” Source: company website · checked Sep 6, 2026
22	Avisto	Strong evidence	Valbonne, FranceHQ checked Sep 6, 2026	201-500	226 contacts →
	“The software development: your passion, our profession.” Source: company website · checked Sep 6, 2026
23	Younup	Indirect evidence	Nantes, FranceHQ checked Sep 6, 2026	201-500	225 contacts →
	“Bienvenue chez Younup : la néo-ESN, agile, humaine, faite de passionnés, avec une ambition simple et forte : remettre l’humain et l’expertise technique au cœur du service IT.” Source: company website · checked Sep 6, 2026
24	XELYA	Indirect evidence	Saint-cloud, FranceHQ checked Sep 6, 2026	201-500	224 contacts →
	“Editeur de logiciels métiers SaaS, nous fournissons des solutions technologiques innovantes, du conseil et de la formation pour dompter la complexité du métier de nos clients.” Source: company website · checked Sep 6, 2026
25	Cegedim Outsourcing	Indirect evidence	Vélizy-villacoublay, FranceHQ checked Sep 6, 2026	201-500	224 contacts →
	“Cegedim Outsourcing, business unit Cegedim, est spécialisée dans deux domaines d'activité : IT et BPO.” Source: company website · checked Sep 6, 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: software development services 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 software development services companies.
Partial evidence: Its own public description names part of software development services companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name software development services 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 3,161 software development services companies based in France

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Software development services companies based in France at a glance

As of Sep 6, 2026

34.0%Verified-email coverage

2.7%Mobile-number coverage

14.8Average contacts per company

1-10Median size (employees)

20.2%Largest-city concentration · Paris

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

2,172

11-50

708

51-200

193

201-500

501-1,000

1,001-5,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

14,8660–30

96231–60

361–90

290–180

56180+

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 software development services 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 France whose own description of what they do matches “software development services 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 software development services 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 software development services companies, and records with no verified work email. Companies headquartered outside France 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, 15,889 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 6, 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.

Software development services companies by metro

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 software development services 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 software development services companies are there based in France?

RevenueBase identified 3,161 software development services companies headquartered in France 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?

Groupe SII, headquartered in Paris, tops this list with the largest team on record.

Which city has the most software development services companies?

Paris leads with 637 headquartered companies, followed by Lyon (111) and Toulouse (66).

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 15,889 verified decision-maker contacts tracked across these 3,161 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 6, 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.