Sopra Steria vs Atos: which is better? Comparison 2026
By our public methodology Sopra Steria scores 93 out of 100 and Atos scores 85. Below: the factors and facts where they differ, each fact with its source.
Score breakdown
| Sopra Steria | Atos | |
|---|---|---|
| Proof of work | 100 | 83 |
| Transparency | 91 | 78 |
| Certificates | 83 | 83 |
| Experience and scale | 100 | 100 |
Pros and cons
Sopra Steria
- Case studies with named clients published
- ISO 27001 certificate stated
- Long on the market
- Large team
Atos
- Case studies with named clients published
- ISO 27001 certificate stated
- Long on the market
- Large team
Facts side by side
| Fact | Sopra Steria | Atos |
|---|---|---|
| Year founded | 1968 soprasteria.com | 1982 atosgroup.com |
| Employees (stated) | 51,000 soprasteria.com | 51,000 atos.ai |
| ISO 27001 certificate | Yes soprasteria.com | Yes atosgroup.com |
| ISO 9001 certificate | Yes soprasteria.com | Yes atosgroup.com |
| Case studies with named clients | Yes soprasteria.com | Yes atos.ai |
| Partner of a named vendor | Yes soprasteria.com | Yes atosgroup.com |
| Open source | Yes soprasteria.com | Not verified |
| Legal entity with registration number | Yes soprasteria.com | Yes atos.ai |
| Annual reports | Yes soprasteria.com | Yes atosgroup.com |
| Code of conduct | Yes soprasteria.com | Not verified |
| Privacy policy | Yes soprasteria.com | Yes atos.ai |
| Contact channels (of 4) | 1 soprasteria.com | 1 atos.ai |