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About Bull

Who we are

In the age of AI and Advanced Computing, it’s time to shape a more responsible digital world, driven by sustainability, sovereignty and real-world outcomes. Born in 1931, Bull is a global leader in high-performance computing, artificial intelligence and quantum innovation. 

Built on an open, end-to-end, and trusted foundation, Bull designs, deploys and runs hardware and software, while providing strategic services that unlock enterprise value, accelerate scientific research and drive society forward.​ 

Driven by world-class R&D, manufacturing capabilities and data science expertise, Bull enables nations and industries to fully control their AI and data, advancing progress for the benefit of the planet.​ 

Together with clients, partners and experts, Bull powers the innovation ​of tomorrow through performance and sustainability.​

#1

HPC player in Europe, India and South America

1st, 2nd & 3rd

most energy-efficient supercomputers in the world (November 2025 Green500)

58

systems in the TOP500 (November 2025) 

20,000 servers

1,200+ racks, 160,000+ CPUs delivered per year in Europe, with additional capabilities mirrored in India and Brazil

1,500

patents

#2

in Europe with 137 quantum patents, pioneering since 2016

250+

certified enterprise AI experts

300+

Enterprise AI projects

10+

world-breaking results for enterprise servers SAP benchmarks

x2

in production capacity with the reconstruction of the Angers factory

What we stand for

With a clear sense of purpose, Bull gives you the supercomputing power and the AI knowledge to unlock enterprise value, accelerate scientific research and drive society forward.

Responsibility and sustainability: Energy will be AI’s limit

Committed to greener and more responsible computing and AI technologies, Bull is a leader in energy-efficient systems, building technologies that are sustainable by nature, performant by design.

Open intelligence and transparency: Freedom to choose

By building on open standards, we deliver transparent, reliable solutions free from vendor lock-in. 

Sovereignty and security: Control your AI and data

To ensure the highest level of strategic autonomy, we design, manufacture and integrate critical components in-house and through trusted partnerships, giving back control to our customers with a regionalised supply chain.

They endorse us

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"I am thrilled to see Bull back in the market with its own brand. Increasingly, organizations are looking for trusted vendors that can speak with expertise about the application of AI to scientific or R&D-focused endeavors. Throughout its history, that is what the Bull brand has represented, including BullSequana servers powering the most powerful supercomputers in Europe. Building on a strong technological heritage, the Bull name reflects a legacy of innovation. Today, Bull continues to connect AI to real-world applications with a range of best-of-breed components and a wealth of domain-specific knowledge. Welcome back, Bull!"

addison-snell

Addison Snell

CEO, Intersect360
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"With a renewed and forward-looking identity, Bull draws on its legacy of HPC and technological excellence to align with the market’s shift toward high-performance solutions that scale responsibly. Its energy-efficient, exascale-ready technologies and end-to-end solutions span hardware, software, and services, which positions itto deliver lasting impacts for both research and business users."

 

 

earl joseph

Earl Joseph

CEO, Hyperion Research

Where we come from

For nearly a century, from Bull to Eviden and back to Bull, we have empowered nations and critical industries to fully control their computational and data assets, turning their biggest challenges into reality while ensuring strategic autonomy. 

1931

Birth of Bull, pioneer in computing technologies and the European leader in mecanography equipment

1963

 

Inauguration of Bull’s largest factory in Angers

1982

 

Nationalisation of Bull by the French government, to safeguard France's IT sovereignty

1996

 

Partial privatisation of Bull, with private investors entering the capital and the French state retaining 30.5%.

2004

 

Award of the first supercomputer contract from the CEA

2014

 

Acquisition of Bull by Atos, becoming the Group’s Advanced Computing business

2019

 

Inauguration of a Global Supercomputer Testing Centre in Angers

2022

 

Start of operations under the Eviden brand, as part of the Atos Group

2025

 

Signing of a share purchase agreement between Atos Group and the French state for the sale of the Advanced Computing business, with a closing expected in 2026

2026

 

Rebirth of the Bull brand, operated under the Atos Group and its Eviden branch until completion of the sale to the French State