IT companies in France 2026: a fact-based ranking
A ranking of IT services and custom software companies headquartered in France, based only on facts from official sites and public registers. We look at ISO 27001, ISO 9001 and SOC 2, case studies with named clients, vendor partner status, the legal entity with its SIREN or RCS number, published reports, year founded and stated headcount. Large groups publish a universal registration document, so the reports fact favours them, and their certificates often cover only some entities; the card says so where stated. The sites of several large companies are closed to automated checks, so they may be missing from this list. The ranking does not assess engineering quality. Compare Scores only within France. The Score is not for sale; paid placements, if any appear, will be a separate labelled block.
| # | Company | Who it serves | ||||||
|---|---|---|---|---|---|---|---|---|
| 1 | Sopra Steria | 93 | 1968 | 51,000 | Yes | Yes | Yes | ISO 27001 ISO 9001 Case studies Vendor partner Open source Legal entity Reports |
| 2 | Capgemini | 89 | 1967 | 423,400 | Yes | Yes | Yes | ISO 27001 ISO 9001 Case studies Vendor partner Legal entity Reports |
| 3 | Atos | 85 | 1982 | 51,000 | Yes | Yes | Yes | ISO 27001 ISO 9001 Case studies Vendor partner Legal entity Reports |
| 4 | Aubay | 64 | 1998 | 9,049 | Yes | Yes | Not verified | ISO 27001 ISO 9001 Legal entity Reports |
| 5 | NEURONES | 61 | 1985 | 7,500 | Yes | Yes | Not verified | ISO 27001 ISO 9001 Legal entity Reports |
| 6 | Hardis Group | 59 | 1984 | 1,700 | Not verified | Not verified | Yes | Case studies Vendor partner Legal entity |
| 7 | Infotel | 59 | 1979 | 3,100 | Yes | Yes | No | ISO 27001 ISO 9001 Legal entity Reports |
| 8 | Talan | 59 | 2002 | 6,200 | Not verified | Not verified | Yes | Case studies Vendor partner Legal entity |
| 9 | Theodo | 51 | 2009 | 700 | Not verified | Not verified | Yes | Case studies Vendor partner Legal entity |
-
- Year founded
- 1968
- Employees (stated)
- 51,000
- ISO 27001 certificate
- Yes
- ISO 9001 certificate
- Yes
- Case studies with named clients
- Yes
Pros
- Case studies with named clients published
- ISO 27001 certificate stated
- Long on the market
- Large team
Details Visit site ↗ 96% backed by facts
-
- Year founded
- 1967
- Employees (stated)
- 423,400
- ISO 27001 certificate
- Yes
- ISO 9001 certificate
- Yes
- Case studies with named clients
- Yes
Pros
- Case studies with named clients published
- ISO 27001 certificate stated
- Long on the market
- Large team
Details Visit site ↗ 91% backed by facts
-
- Year founded
- 1982
- Employees (stated)
- 51,000
- ISO 27001 certificate
- Yes
- ISO 9001 certificate
- Yes
- Case studies with named clients
- Yes
Pros
- Case studies with named clients published
- ISO 27001 certificate stated
- Long on the market
- Large team
Details Visit site ↗ 88% backed by facts
-
- Year founded
- 1998
- Employees (stated)
- 9,049
- ISO 27001 certificate
- Yes
- ISO 9001 certificate
- Yes
- Case studies with named clients
- Not verified
Pros
- ISO 27001 certificate stated
- Long on the market
- Large team
- Legal entity with registration number given
Details Visit site ↗ 66% backed by facts
-
- Year founded
- 1985
- Employees (stated)
- 7,500
- ISO 27001 certificate
- Yes
- ISO 9001 certificate
- Yes
- Case studies with named clients
- Not verified
Pros
- ISO 27001 certificate stated
- Long on the market
- Large team
- Legal entity with registration number given
Details Visit site ↗ 63% backed by facts
-
- Year founded
- 1984
- Employees (stated)
- 1,700
- ISO 27001 certificate
- Not verified
- ISO 9001 certificate
- Not verified
- Case studies with named clients
- Yes
Pros
- Case studies with named clients published
- Long on the market
- Large team
- Partner status with a vendor stated
Details Visit site ↗ 64% backed by facts
-
- Year founded
- 1979
- Employees (stated)
- 3,100
- ISO 27001 certificate
- Yes
- ISO 9001 certificate
- Yes
- Case studies with named clients
- No
Pros
- ISO 27001 certificate stated
- Long on the market
- Large team
- Legal entity with registration number given
Cons
- Clients in case studies are not named
Details Visit site ↗ 78% backed by facts
-
- Year founded
- 2002
- Employees (stated)
- 6,200
- ISO 27001 certificate
- Not verified
- ISO 9001 certificate
- Not verified
- Case studies with named clients
- Yes
Pros
- Case studies with named clients published
- Long on the market
- Large team
- Partner status with a vendor stated
Details Visit site ↗ 64% backed by facts
-
- Year founded
- 2009
- Employees (stated)
- 700
- ISO 27001 certificate
- Not verified
- ISO 9001 certificate
- Not verified
- Case studies with named clients
- Yes
Pros
- Case studies with named clients published
- Partner status with a vendor stated
- Legal entity with registration number given
- Privacy policy published
Details Visit site ↗ 61% backed by facts
Not ranked yet: not enough verified data
These services are known to us, but we haven't verified enough facts to rank them fairly.
- Zenika (53% backed by facts)
How we calculate the Score
30%
Proof of work
At least three public case studies naming the client, stated partner status with a named vendor, and the company's own open-source code. An anonymous "large bank" does not count as a named client.
25%
Transparency
Whether a legal entity of this country is given with its registration number, annual reports are published, a code of conduct and a privacy policy exist, and how many of four contact channels are listed: phone, email, form or chat, address.
25%
Certificates
Whether current ISO/IEC 27001 and ISO 9001 certificates and a SOC 2 report are stated. "We work to ISO standards" is not a certificate. We do not check the documents with certification bodies.
20%
Experience and scale
Year founded (scale up to 30 years) and stated headcount (logarithmic scale up to 10,000 people). Figures are as stated; for a group they may cover the whole group.
How to choose an IT contractor
Check the legal entity
Find the name and registration number and compare them with the state register. The contract should name the same company, not an intermediary.
Ask for certificate copies
Ask for the certificate number, validity and scope. A certificate may cover only one office or one service.
Talk to clients
Ask for contacts from similar projects. Case studies on a site show only what the company chose to show.
Secure the rights to the code
The contract should cover transfer of code rights, repository access, acceptance and support after delivery.
Frequently asked questions
What does first place mean?
The company in first place has the highest Score under our open method among companies in that country. It is not a judgement of its engineering and not advice to choose it.
Why do big companies score higher?
Experience and scale make up 20% of the Score, and larger companies more often hold certificates and publish reports. For a small project that is not necessarily an advantage: compare the facts that matter to you.
What counts as a case study with a named client?
At least three public examples of work where the client is named. Anonymous descriptions such as "a large retailer" do not count, although some clients may forbid being named.
Why are there no reviews or Clutch scores?
Reviews are hard to verify and places on paid lists are bought. We show only facts from official sites and registers.
Why is data missing for some companies?
If a fact was not found on the official site, or the site is closed to automated checks, we show "Not verified" and award no points. It does not mean the company lacks it.
Can I compare companies from different countries?
No. Registers, certificates and publishing habits differ, so the Score only makes sense within one country.