Company lists · Data refreshed September 2026

Top 25 Outsystems developers based in France

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

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 203 companies tracked

RevenueBase identified 203 outsystems developers headquartered in France as of September 2026 and tracks 3,423 professional contacts across them, including 1,316 with verified work emails. Paris is the largest hub.

This list covers outsystems 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 20, 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 20, 2026 86% judged on-target in blind review

203Companies

3,423Contacts tracked

1,316Verified emails

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The 25 largest outsystems developers based in France

Ranked by team size

Top 25 of 203 outsystems developers based in France, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to outsystems 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	SFEIR	Indirect evidence	Neuilly-sur-seine, FranceHQ checked Sep 20, 2026	501-1,000	904 contacts →
	Indirect evidence “SFEIR est une Société d’expertise spécialisée dans le développement d’applications sous toutes leurs formes ( web, mobile, IOT, cloud, data, etc.).” Source: RevenueBase Database · checked Sep 20, 2026
2	Takima	Indirect evidence	Bagneux, FranceHQ checked Sep 20, 2026	51-200	222 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 20, 2026
3	UNIS	Indirect evidence	Villeneuve D'ascq, FranceHQ checked Sep 20, 2026	201-500	181 contacts →
	Indirect evidence “Vous avez envie de prendre part à un projet d'entreprise fort au sein d'une entreprise qui favorise l'expression des talents de chacun?” Source: RevenueBase Database · checked Sep 20, 2026
4	Omnilog	Indirect evidence	Boulogne-billancourt, FranceHQ checked Sep 20, 2026	201-500	139 contacts →
	Indirect evidence “Nos mots-clés :#Médias,#Technos,#Convivialité Plus qu'une SSII, Omnilog est une équipe de 300 ingénieurs spécialisés dans le développement web et mobile et les technologies.NET…” Source: RevenueBase Database · checked Sep 20, 2026
5	Web-Atrio	Indirect evidence	Paris, FranceHQ checked Sep 20, 2026	51-200	111 contacts →
	Indirect evidence “Bienvenue chez WEB-ATRIO, l’#ESN qui change la donne!” Source: RevenueBase Database · checked Sep 20, 2026
6	Apollo Coding Life	Indirect evidence	Lyon, FranceHQ checked Sep 20, 2026	51-200	110 contacts →
	Indirect evidence “Apollo ssc est une SSII Lyonnaise créée en 2004 et composée d’une équipe d’une vingtaine d’ingénieurs.” Source: RevenueBase Database · checked Sep 20, 2026
7	6tm	Indirect evidence	Rennes, FranceHQ checked Sep 20, 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 20, 2026
8	Symolia Technologies	Indirect evidence	Boulogne-billancourt, FranceHQ checked Sep 20, 2026	51-200	69 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
9	Désirade	Indirect evidence	Toulouse, FranceHQ checked Sep 20, 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 20, 2026
10	Ipsosenso	Indirect evidence	Paris, FranceHQ checked Sep 20, 2026	51-200	64 contacts →
	Indirect evidence “Ipsosenso manages from end-to-end (design, development and outsourcing) e-applications projects of large accounts.” Source: RevenueBase Database · checked Sep 20, 2026
11	Oligos	Indirect evidence	Neuilly-sur-seine, FranceHQ checked Sep 20, 2026	51-200	52 contacts →
	Indirect evidence “Oligos devient Magellan!” Source: RevenueBase Database · checked Sep 20, 2026
12	BILOG	Indirect evidence	Versailles, FranceHQ checked Sep 20, 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 20, 2026
13	code.store	Indirect evidence	Paris, FranceHQ checked Sep 20, 2026	51-200	47 contacts →
	Indirect 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 20, 2026
14	PC Soft	Indirect evidence	Montpellier, FranceHQ checked Sep 20, 2026	51-200	46 contacts →
	Indirect evidence “PC SOFT was started in 1984.” Source: RevenueBase Database · checked Sep 20, 2026
15	Oxiane	Indirect evidence	Boulogne Billancourt, FranceHQ checked Sep 20, 2026	51-200	36 contacts →
	Indirect evidence “OXiane est un cabinet d’ingénierie, de conseil et de formation technologique.” Source: RevenueBase Database · checked Sep 20, 2026
16	Iocean	Indirect evidence	Montpellier, FranceHQ checked Sep 20, 2026	11-50	35 contacts →
	Indirect evidence “IOcean is an IT engineering company on a human scale (35 employees, 2 agencies) that supports its clients in all their projects: software engineering, websites, Intranet/Extranet…” Source: RevenueBase Database · checked Sep 20, 2026
17	LA Mobilery	Indirect evidence	Wasquehal, FranceHQ checked Sep 20, 2026	51-200	35 contacts →
	Indirect evidence “Depuis 2010, nous accompagnons nos clients pour créer des applications mobiles & des logiciels web C'est en équipe et avec nos clients que nous co-construisons des dispositifs…” Source: RevenueBase Database · checked Sep 20, 2026
18	rokodo.io	Partial evidence	Issy-les-moulineaux, FranceHQ checked Sep 20, 2026	11-50	33 contacts →
	Partial evidence “Expertise Outsystems & ServiceNow - Multiexperience Development Platforms (MXDP )- Low Code / No Code - Consulting - Technical and Functional Architecture - Digital Transformation…” Source: RevenueBase Database · checked Sep 20, 2026
19	Énéance	Indirect evidence	Paris, FranceHQ checked Sep 20, 2026	11-50	31 contacts →
	Indirect evidence “Nous sommes Énéance, spécialiste de la conception et du développement d’applications web et mobiles sur mesure.” Source: RevenueBase Database · checked Sep 20, 2026
20	PIT	Indirect evidence	Lille, FranceHQ checked Sep 20, 2026	11-50	30 contacts →
	Indirect evidence “Pit est une ESN lilloise, créée en 2015 (anciennement Progress‑IT), composée de développeurs, product managers et Scrum Masters.” Source: RevenueBase Database · checked Sep 20, 2026
21	BEAPP	Indirect evidence	Nantes, FranceHQ checked Sep 20, 2026	11-50	30 contacts →
	Indirect evidence “Be App est une entreprise nantaise spécialisée dans le développement d'applications smartphones pour les petites et moyennes entreprises.” Source: RevenueBase Database · checked Sep 20, 2026
22	Aptineo	Indirect evidence	Paris, FranceHQ checked Sep 20, 2026	51-200	27 contacts →
	Indirect evidence “APTINEO, cabinet de conseil en SI, accompagne avec succès de grands groupes depuis 2008.” Source: RevenueBase Database · checked Sep 20, 2026
23	Siqual Informatique	Indirect evidence	Le Petit-quevilly, FranceHQ checked Sep 20, 2026	11-50	25 contacts →
	Indirect evidence “SIQUAL, société spécialisée dans le développement de solutions web et la gestion des systèmes d'information propose des services pour les TPE/PME allant jusqu'aux grands groupes…” Source: RevenueBase Database · checked Sep 20, 2026
24	Noesio	Indirect evidence	Paris, FranceHQ checked Sep 20, 2026	11-50	24 contacts →
	Indirect evidence “Expert des solutions digitales dédiées au grand public et aux professionnels, Noesio est une communauté d’ingénieurs dont la vocation est de répondre à vos enjeux de croissance de…” Source: RevenueBase Database · checked Sep 20, 2026
25	Believe IT	Indirect evidence	Montpellier, FranceHQ checked Sep 20, 2026	11-50	23 contacts →
	Indirect evidence “BELIEVE IT est une société de service informatique basée à Montpellier, créée par et pour des développeurs.” Source: RevenueBase Database · checked Sep 20, 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: outsystems 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 outsystems developers.
Partial evidence: Its own public description names part of outsystems developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name outsystems 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 203 outsystems developers based in France

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Outsystems developers based in France at a glance

As of Sep 20, 2026

38.4%Verified-email coverage

16.9Average contacts per company

1-10Median size (employees)

24.6%Largest-city concentration · Paris

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

118

11-50

51-200

201-500

501-1,000

Email recency for this list is measured worldwide rather than for France, so it is reported there. Company counts and contact totals on this page are exact for France, over 203 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 outsystems 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 “outsystems 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 outsystems 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 outsystems 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, 1,316 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 20, 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.

Outsystems developers by metro

Outsystems developers in Paris50

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 outsystems 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 outsystems developers are there based in France?

RevenueBase identified 203 outsystems 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?

SFEIR, headquartered in Neuilly-Sur-Seine, tops this list with the largest team on record.

Which city has the most outsystems developers?

Paris leads with 50 headquartered companies, followed by Lyon (11) and Toulouse (7).

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 1,316 verified decision-maker contacts tracked across these 203 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 20, 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.