Company lists · Data refreshed September 2026

Top 25 Custom software development consulting firms based in Nantes, France

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

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 65 companies tracked

RevenueBase identified 65 custom software development consulting firms headquartered in Nantes, France as of September 2026 and tracks 803 professional contacts across them, including 332 with verified work emails. Paris is the largest hub.

This list covers custom software development consulting firms headquartered in Nantes, 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 24, 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 24, 2026 86% judged on-target in blind review

65Companies

803Contacts tracked

332Verified emails

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The 25 largest custom software development consulting firms based in Nantes, France

Ranked by team size

Top 25 of 65 custom software development consulting firms based in Nantes, France, 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	Younup	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	201-500	225 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 24, 2026
2	Thetribe	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	51-200	71 contacts →
	Indirect evidence “En 2025, theTribe célèbre 10 ans d’expertise dans le développement de solutions numériques sur-mesure.” Source: RevenueBase Database · checked Sep 24, 2026
3	Wescale	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	51-200	66 contacts →
	Indirect evidence “WeScale est un cabinet de conseil, de réalisation et d'expertise technique dans les domaines du développement logiciel et des opérations IT, tous deux augmentés par l’IA.” Source: RevenueBase Database · checked Sep 24, 2026
4	Elephant Technologies	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	51-200	64 contacts →
	Indirect evidence “Nous sommes une ESN experte, engagée et résolument humaine.” Source: RevenueBase Database · checked Sep 24, 2026
5	Jehann	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	11-50	45 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 24, 2026
6	Gingerminds	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	51-200	40 contacts →
	Indirect evidence “Bonjour à tous, Architecte d'écosystèmes digitaux, depuis plus de 20 ans nous cadrons, designons, mettons en œuvre et maintenons des écosystèmes digitaux sur mesure, performants…” Source: RevenueBase Database · checked Sep 24, 2026
7	Umanit	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	11-50	25 contacts →
	Indirect evidence “Depuis près de 15 ans, nous sommes spécialisés dans la conception et le développement de solutions techniques sur mesure pour réaliser les ambitions de nos clients.” Source: RevenueBase Database · checked Sep 24, 2026
8	Digital Garden	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	11-50	22 contacts →
	Indirect evidence “Digital Garden (une agence du Groupe Province_) est une agence nantaise d’idées, d’expertises et de développements digitaux recherche de nouveaux talents pour soutenir sa forte…” Source: RevenueBase Database · checked Sep 24, 2026
9	Holenek Ingénierie	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	11-50	15 contacts →
	Indirect evidence “Who are we?” Source: RevenueBase Database · checked Sep 24, 2026
10	Modalb	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	11-50	12 contacts →
	Indirect evidence “ModalB accompagne les entreprises dans leurs projets numériques 🤝 ModalB est une société de conseil et de service en IT qui met son expertise au service de ses clients pour…” Source: RevenueBase Database · checked Sep 24, 2026
11	Aptitude Logiciels	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	11-50	12 contacts →
	Indirect evidence “L'informatique est aujourd'hui au cœur de votre entreprise.” Source: RevenueBase Database · checked Sep 24, 2026
12	Black Blue Bees Studio 3bstudio	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	12 contacts →
	Indirect evidence “Black Blue Bees est un studio de développement spécialisé dans le sur-mesure à l'aide des technologies de l'écosystème Microsoft.” Source: RevenueBase Database · checked Sep 24, 2026
13	Inöweeno	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	9 contacts →
	Indirect evidence “Modèle hybride entre le savoir-faire métier des cabinets de conseil et la maîtrise technologique des ESN, Inöweeno et ses Digital Lovers sont à vos côtés sur tous les aspects de…” Source: RevenueBase Database · checked Sep 24, 2026
14	W-Seils Digital Responsable	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	9 contacts →
	Indirect evidence “Notre structure compacte et notre approche basée sur une démarche qualité pragmatique sont nos principaux atouts pour répondre aux besoins de projets de toute taille.” Source: RevenueBase Database · checked Sep 24, 2026
15	Toolin	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	8 contacts →
	Indirect evidence “Optimisez votre métier à travers les apports du numérique.” Source: RevenueBase Database · checked Sep 24, 2026
16	Fobware SI	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	8 contacts →
	Indirect evidence “Basée à Nantes depuis 2012, FOBware SI est une société de services et de conseils en systèmes d’information à taille humaine.” Source: RevenueBase Database · checked Sep 24, 2026
17	Audensiel Grand Ouest	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	501-1,000	8 contacts →
	Indirect evidence “Audensiel Grand Ouest est le bureau régional d'Audensiel, cabinet de conseil en transformation digitale et conseil métiers IT sur tous les secteurs d'activité.” Source: RevenueBase Database · checked Sep 24, 2026
18	UDW	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	7 contacts →
	Indirect evidence “Up Down Wind Think, Plan and Excute your Performance 20 consultants for U!” Source: RevenueBase Database · checked Sep 24, 2026
19	Squaad	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	6 contacts →
	Indirect evidence “J'ai 2 lignes pour te donner envie de lire la suite.” Source: RevenueBase Database · checked Sep 24, 2026
20	Cidema Group	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	6 contacts →
	Indirect evidence “Nous accompagnons nos clients dans la conception, le développement et la mise en place de projets structurants et novateurs de la phase d’analyse jusqu’à l’installation et la…” Source: RevenueBase Database · checked Sep 24, 2026
21	We Craft Apps	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	11-50	6 contacts →
	Indirect evidence “We Craft Apps est une agence de développement Web et mobile qui a été créé en 2013 afin de proposer une nouvelle offre à mi-chemin entre la société de services et l’agence web.” Source: RevenueBase Database · checked Sep 24, 2026
22	ONITI	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	5 contacts →
	Indirect evidence “Gestion d'image Internet • Mise en oeuvre de solutions Internet : Site web, Boutique en ligne • Déploiement de solution de messagerie électronique collaborative Accompagnement…” Source: RevenueBase Database · checked Sep 24, 2026
23	Digitalskipper	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	5 contacts →
	Indirect evidence “Besoin d échanger sur votre évolution digitale?” Source: RevenueBase Database · checked Sep 24, 2026
24	Stino SAS	Indirect evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	4 contacts →
	Indirect evidence “La société STINO peut vous accompagner dans les domaines suivants:[ Assistance à maîtrise d'ouvrage ]- Recueil du besoin- Rédaction de cahiers des charges- Définition du budget et…” Source: RevenueBase Database · checked Sep 24, 2026
25	RECOG	Strong evidence	Nantes, FranceHQ checked Sep 24, 2026	1-10	3 contacts →
	Strong evidence “RECOG is a software development company based in Nantes FR” 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 65 custom software development consulting firms based in Nantes, France

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Custom software development consulting firms based in Nantes, France at a glance

As of Sep 24, 2026

41.3%Verified-email coverage

12.4Average contacts per company

1-10Median size (employees)

1652.3%Largest-city concentration · Paris

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole France list rather than for Nantes, so it is reported there. Company counts and contact totals on this page are exact for Nantes, over 65 companies.

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.
What qualifies: Companies headquartered in Nantes, France 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. Companies headquartered outside Nantes 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, 332 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 metro in France

Custom software development consulting firms in Paris1074
Custom software development consulting firms in Lyon177
Custom software development consulting firms in Toulouse94
Custom software development consulting firms in Bordeaux86
Custom software development consulting firms in Nantes65
Custom software development consulting firms in Marseille63
Custom software development consulting firms in Lille52
Custom software development consulting firms in Montpellier50
Custom software development consulting firms in Rennes40
Custom software development consulting firms in Strasbourg38
Custom software development consulting firms in Neuilly-Sur-Seine33
Custom software development consulting firms in Boulogne-Billancourt31
Custom software development consulting firms in Courbevoie30
Custom software development consulting firms in Nice30
Custom software development consulting firms in Grenoble26

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 based in Nantes, France?

RevenueBase identified 65 custom software development consulting firms headquartered in Nantes, 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?

Younup, headquartered in Nantes, tops this list with the largest team on record.

Which city has the most custom software development consulting firms?

Paris leads with 1074 headquartered companies, followed by Lyon (177) and Toulouse (94).

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 332 verified decision-maker contacts tracked across these 65 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.