AtoS SE is one of the world leaders in IT services. The group's activity is organized around three sectors:
- outsourcing services and consulting services;
- system integration;
- supply of transaction services: electronic payment transaction processing, remote payment management, development of payment solutions, etc. The group also develops an externalization of operating processes activity.
Net sales break down by market into public sector and defense (21.7%), financial services and insurance (19.2%), manufacturing industry (18.7%), telecoms/media/technology (13.9%), health and life sciences (12%) and other (14.5%).