Company lists · Data refreshed September 2026

Top 25 Custom software development firms based in France

Name: Custom software development firms based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 1, 2026 1,394 companies tracked

RevenueBase identified 1,394 custom software development firms headquartered in France as of September 2026 and tracks 8,497 professional contacts across them, including 2,864 with verified work emails and 254 with mobile numbers. Paris is the largest hub.

This list covers custom software development firms 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 1, 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 RevenueBase Smart Search rating on every row Refreshed Sep 1, 2026 86% judged on-target in blind review

1,394Companies

8,497Contacts tracked

2,864Verified emails

254Mobile numbers

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest custom software development firms based in France

Ranked by team size

Top 25 of 1,394 custom software development firms based in France, ranked by team size, largest first. Data refreshed Sep 1, 2026. RevenueBase Smart Search rates how each company's information relates to custom software development 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	Kaizen Solutions KZS	Indirect evidence	Paris, France	201-500	268 contacts →
	Indirect evidence “Nous sommes une ESN (entreprise de services numériques) spécialisée dans la conception, le développement et la maintenabilité de solutions informatiques, techniques et…” Source: RevenueBase Database · checked Sep 1, 2026
2	Takima	Indirect evidence	Bagneux, France	51-200	219 contacts →
	Indirect evidence “Whether dealing with Opensource, B2B, B2C mobile apps, intranets or HA infrastructures, the same approach remains: Understanding the context, qualifying the use case, determining…” Source: RevenueBase Database · checked Sep 1, 2026
3	AXYUS	Indirect evidence	Nantes, France	51-200	172 contacts →
	Indirect evidence “Une SSII avec de vraies valeurs."S'engager au forfait, respecter, les attentes de nos clients, leur budget en favorisant notamment la réutilisation affichée de nos composants…” Source: RevenueBase Database · checked Sep 1, 2026
4	SCUB	Indirect evidence	Bordeaux, France	51-200	125 contacts →
	Indirect evidence “Scub est une société de service en informatique qui a pour but de fournir du conseil et de développer des applications spécifiques afin de résoudre vos problématiques les plus…” Source: RevenueBase Database · checked Sep 1, 2026
5	Spark-It	Partial evidence	Courbevoie, France	51-200	105 contacts →
	Partial evidence “Spark-it is an expert in software architecture.” Source: RevenueBase Database · checked Sep 1, 2026
6	DIROX	Partial evidence	Paris, France	51-200	105 contacts →
	Partial evidence “At Dirox, we don’t just build software, we build relationships.” Source: RevenueBase Database · checked Sep 1, 2026
7	Castelis	Indirect evidence	Ivry Sur Seine, France	51-200	95 contacts →
	Indirect evidence “Castelis, c'est l'histoire d'une entreprise en croissance continue.” Source: RevenueBase Database · checked Sep 1, 2026
8	Toshiba Centre Grand Ouest	Indirect evidence	Orleans, France	51-200	94 contacts →
	Indirect evidence “Toshiba Centre Grand Ouest met sa passion de l'innovation au service de ses clients en proposant des solutions à la pointe de la technologie, utiles à la vie des entreprises…” Source: RevenueBase Database · checked Sep 1, 2026
9	6tm	Indirect evidence	Rennes, France	51-200	92 contacts →
	Indirect evidence “6TM accompagne ses clients vers un monde toujours plus communicant grâce à ses solutions web, mobiles et logiciels.” Source: RevenueBase Database · checked Sep 1, 2026
10	4sh	Indirect evidence	Le Haillan, France	51-200	85 contacts →
	Indirect evidence “4SH est une entreprise de services du numérique.” Source: RevenueBase Database · checked Sep 1, 2026
11	SERLI	Indirect evidence	Niort, France	51-200	80 contacts →
	Indirect evidence “If you’re looking for a team who are up to the challenges of your project, you found it!” Source: RevenueBase Database · checked Sep 1, 2026
12	Thetribe	Indirect evidence	Nantes, France	51-200	79 contacts →
	Indirect evidence “En 2025, theTribe célèbre 10 ans d’expertise dans le développement de solutions numériques sur-mesure.” Source: RevenueBase Database · checked Sep 1, 2026
13	Square1	Strong evidence	Mougins, France	51-200	76 contacts →
	Strong evidence “Square1 is a creative online and mobile software development company.” Source: RevenueBase Database · checked Sep 1, 2026
14	Ipanova	Indirect evidence	Blagnac, France	51-200	70 contacts →
	Indirect evidence “IPANOVA a pour mission de développer des solutions informatiques innovantes et adaptées aux besoins de nos clients, tout en favorisant une approche collaborative et inclusive.” Source: RevenueBase Database · checked Sep 1, 2026
15	Exomind	Indirect evidence	Boulogne-Billancourt, France	51-200	70 contacts →
	Indirect evidence “EXOMIND est une agence de conseil spécialisée dans la conception et le développement d'applications mobiles et plateformes web.” Source: RevenueBase Database · checked Sep 1, 2026
16	Désirade	Indirect evidence	Lyon, France	51-200	69 contacts →
	Indirect evidence “Désirade est une entreprise de services du numérique spécialisée dans les petites applications depuis 27 ans à Toulouse et Lyon.” Source: RevenueBase Database · checked Sep 1, 2026
17	Elephant Technologies	Indirect evidence	Nantes, France	51-200	65 contacts →
	Indirect evidence “Nous sommes une ESN experte, engagée et résolument humaine.” Source: RevenueBase Database · checked Sep 1, 2026
18	Ipsosenso	Partial evidence	Paris, France	51-200	64 contacts →
	Partial evidence “Ipsosenso manages from end-to-end (design, development and outsourcing) e-applications projects of large accounts.” Source: RevenueBase Database · checked Sep 1, 2026
19	Kreactive	Indirect evidence	Paris, France	51-200	53 contacts →
	Indirect evidence “Notre métier : Digital Transformers Notre mission : Augmenter votre Valeur!” Source: RevenueBase Database · checked Sep 1, 2026
20	Repply	Indirect evidence	La Rochelle, France	11-50	52 contacts →
	Indirect evidence “repply est une société basée à La Rochelle, spécialisée dans le développement d'applications métiers sur les technologies web et mobiles.” Source: RevenueBase Database · checked Sep 1, 2026
21	BILOG	Indirect evidence	Versailles, France	51-200	51 contacts →
	Indirect evidence “Bilog SAS est une ESN basée à Versailles qui, forte de ses plus de 530 projets réalisés (à l'été 2016), propose aux éditeurs de logiciels et aux ETI, des compétences dans la…” Source: RevenueBase Database · checked Sep 1, 2026
22	Ibisdev	Partial evidence	Paris, France	51-200	49 contacts →
	Partial evidence “We are a high performance software factory with headquarters in Paris,Barcelona and Buenos Aires.” Source: RevenueBase Database · checked Sep 1, 2026
23	Wemoov	Indirect evidence	Carquefou, France	51-200	48 contacts →
	Indirect evidence “QUI SOMMES-NOUS?” Source: RevenueBase Database · checked Sep 1, 2026
24	Enovea, Votre Partenaire Logiciel	Indirect evidence	Paris, France	11-50	46 contacts →
	Indirect evidence “Fort de ses 4 valeurs : l’excellence, la liberté, la confiance et la créativité, Enovea propose 2 lignes d’expertise depuis sa création à Rouen en 2008 : 1.” Source: RevenueBase Database · checked Sep 1, 2026
25	Vigicorp	Indirect evidence	Saint-Herblain, France	11-50	45 contacts →
	Indirect evidence “Créée en 2007, Vigicorp est une agence nantaise spécialisée dans le développement web et mobile dont la mission est d’accompagner les organisations dans leurs projets de création…” Source: RevenueBase Database · checked Sep 1, 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 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 firms.
Partial evidence: Its own public description names part of custom software development 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 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 1,394 custom software development firms based in France

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 2,864 reachable decision-makers.

Free signup · no credit card

View the full list →

Custom software development firms based in France at a glance

As of Sep 1, 2026

33.7%Verified-email coverage

3.0%Mobile-number coverage

6.1Average contacts per company

1-10Median size (employees)

18.7%Largest-city concentration · Paris

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

1,104

11-50

228

51-200

201-500

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 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 France whose own description of what they do matches “custom software development 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 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 firms, 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, 2,864 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 1, 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 firms by metro

Custom software development firms in Paris260
Custom software development firms in Lyon58
Custom software development firms in Toulouse36
Custom software development firms in Bordeaux33

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 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 firms are there based in France?

RevenueBase identified 1,394 custom software development firms 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?

Kaizen Solutions KZS, headquartered in Paris, tops this list with the largest team on record.

Which city has the most custom software development firms?

Paris leads with 260 headquartered companies, followed by Lyon (58) and Toulouse (36).

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 2,864 verified decision-maker contacts tracked across these 1,394 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 1, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,394 custom software development firms based in France. Start with a free account, no credit card.

Download this list →

Related lists

Custom software development firms by geography

Browse the directory

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.