Company lists · Data refreshed September 2026

Top 25 Custom SaaS developers based in France

Name: Custom SaaS developers based in France
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 786 companies tracked

RevenueBase identified 786 custom SaaS developers headquartered in France as of September 2026 and tracks 5,937 professional contacts across them, including 2,166 with verified work emails and 179 with mobile numbers. Paris is the largest hub.

This list covers custom SaaS developers 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 29, 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 29, 2026 86% judged on-target in blind review

786Companies

5,937Contacts tracked

2,166Verified emails

179Mobile numbers

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The 25 largest custom SaaS developers based in France

Ranked by team size

Top 25 of 786 custom SaaS developers based in France, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to custom SaaS 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	Avanquest	Indirect evidence	Courbevoie, FranceHQ checked Sep 29, 2026	201-500	315 contacts →
	Indirect evidence “At Avanquest, we develop software that makes digital simpler, smarter and more useful.” Source: RevenueBase Database · checked Sep 29, 2026
2	Kaizen Solutions KZS	Indirect evidence	Montbonnot-saint-martin, FranceHQ checked Sep 29, 2026	201-500	261 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 29, 2026
3	XELYA	Partial evidence	Saint-cloud, FranceHQ checked Sep 29, 2026	201-500	224 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 29, 2026
4	SCUB	Indirect evidence	Angoulême, FranceHQ checked Sep 29, 2026	51-200	127 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 29, 2026
5	IS Technologies	Indirect evidence	Courbevoie Cedex, FranceHQ checked Sep 29, 2026	n/a	127 contacts →
	Indirect evidence “IS Technologies est une société de conseils et de services en informatique basée à La Défense.” Source: RevenueBase Database · checked Sep 29, 2026
6	Spark-It	Indirect evidence	La Défense 5, FranceHQ checked Sep 29, 2026	51-200	105 contacts →
	Indirect evidence “Spark-it is an expert in software architecture.” Source: RevenueBase Database · checked Sep 29, 2026
7	Castelis	Indirect evidence	Ivry Sur Seine, FranceHQ checked Sep 29, 2026	51-200	97 contacts →
	Indirect evidence “Castelis, c'est l'histoire d'une entreprise en croissance continue.” Source: RevenueBase Database · checked Sep 29, 2026
8	6tm	Indirect evidence	Rennes, FranceHQ checked Sep 29, 2026	51-200	91 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 29, 2026
9	4sh	Indirect evidence	Le Haillan, FranceHQ checked Sep 29, 2026	51-200	85 contacts →
	Indirect evidence “4SH est une entreprise de services du numérique.” Source: RevenueBase Database · checked Sep 29, 2026
10	SERLI	Indirect evidence	Chasseneuil-du-poitou, FranceHQ checked Sep 29, 2026	51-200	78 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 29, 2026
11	Ipanova	Indirect evidence	Blagnac, FranceHQ checked Sep 29, 2026	51-200	66 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 29, 2026
12	Désirade	Indirect evidence	Toulouse, FranceHQ checked Sep 29, 2026	51-200	66 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 29, 2026
13	Elephant Technologies	Indirect evidence	Nantes, FranceHQ checked Sep 29, 2026	51-200	64 contacts →
	Indirect evidence “Nous sommes une ESN experte, engagée et résolument humaine.” Source: RevenueBase Database · checked Sep 29, 2026
14	Axopen	Indirect evidence	Lyon, FranceHQ checked Sep 29, 2026	51-200	61 contacts →
	Indirect evidence “L'entreprise Axopen propose toute une gamme de produits et services informatique allant du conseil en système d'informations, développement de solutions sur mesure ou intégration…” Source: RevenueBase Database · checked Sep 29, 2026
15	BILOG	Indirect evidence	Versailles, FranceHQ checked Sep 29, 2026	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 29, 2026
16	Steamulo	Indirect evidence	Paris, FranceHQ checked Sep 29, 2026	11-50	49 contacts →
	Indirect evidence “STEAMULO - Digital & IA Factory STEAMULO est une équipe d’experts techniques apportant des solutions innovantes aux problématiques web, mobile & IA de ses clients.” Source: RevenueBase Database · checked Sep 29, 2026
17	Wemoov	Indirect evidence	Carquefou, FranceHQ checked Sep 29, 2026	51-200	49 contacts →
	Indirect evidence “QUI SOMMES-NOUS?” Source: RevenueBase Database · checked Sep 29, 2026
18	Pole SUD	Indirect evidence	Marseille, FranceHQ checked Sep 29, 2026	51-200	49 contacts →
	Indirect evidence “Entreprise de services du numérique (ESN), est le partenaire de référence de ses clients depuis plus de 25 ans!” Source: RevenueBase Database · checked Sep 29, 2026
19	code.store	Partial evidence	Paris, FranceHQ checked Sep 29, 2026	51-200	47 contacts →
	Partial evidence “code.store designs and builds custom software with AI at every step, from specs to production: ERPs, CMS and media platforms, insurance and mobile apps.” Source: RevenueBase Database · checked Sep 29, 2026
20	Caplaser	Indirect evidence	Castres, FranceHQ checked Sep 29, 2026	51-200	47 contacts →
	Indirect evidence “Intégrateur local et régional de solutions informatiques innovantes en région Occitanie et Nouvelle Aquitaine.” Source: RevenueBase Database · checked Sep 29, 2026
21	Elipce Solutions, Votre Spécialiste Logiciel & Data	Indirect evidence	Valence, FranceHQ checked Sep 29, 2026	11-50	47 contacts →
	Indirect evidence “Chez Elipce Solutions, nous concevons, déployons et maintenons des solutions logicielles adaptées à vos enjeux spécifiques, qu'il s'agisse d'outils internes dans tous les…” Source: RevenueBase Database · checked Sep 29, 2026
22	Enovea, Votre Partenaire Logiciel	Indirect evidence	Mont-saint-aignan, FranceHQ checked Sep 29, 2026	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 29, 2026
23	Jehann	Indirect evidence	Nantes, FranceHQ checked Sep 29, 2026	11-50	45 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
24	Groupefbo	Indirect evidence	La Roche-sur-yon, FranceHQ checked Sep 29, 2026	11-50	42 contacts →
	Indirect evidence “Le GroupeFBO est l'un des leaders du développement informatique en Vendée.” Source: RevenueBase Database · checked Sep 29, 2026
25	DIJI	Indirect evidence	Levallois-perret, FranceHQ checked Sep 29, 2026	51-200	42 contacts →
	Indirect evidence “We are diji.” 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: custom SaaS 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 custom SaaS developers.
Partial evidence: Its own public description names part of custom SaaS developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name custom SaaS 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 786 custom SaaS developers based in France

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Custom SaaS developers based in France at a glance

As of Sep 29, 2026

36.5%Verified-email coverage

3.0%Mobile-number coverage

7.6Average contacts per company

1-10Median size (employees)

18.8%Largest-city concentration · Paris

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

600

11-50

151

51-200

201-500

1,001-5,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 32.0d

9040–30

1,18331–60

7061–90

190–180

8180+

Company record updated

Median 88.0d

00–30

1,37931–60

1,77361–90

2,42990–180

356180+

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 SaaS 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.
What qualifies: Companies headquartered in France whose own description of what they do matches “custom SaaS 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 custom SaaS 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 custom SaaS developers, 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, 2,166 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.

Custom SaaS developers 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 custom SaaS 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 custom SaaS developers are there based in France?

RevenueBase identified 786 custom SaaS developers 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?

Avanquest, headquartered in Courbevoie, tops this list with the largest team on record.

Which city has the most custom SaaS developers?

Paris leads with 148 headquartered companies, followed by Lyon (30) and Toulouse (25).

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 2,166 verified decision-maker contacts tracked across these 786 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.