Who we are

star

Freedom to thrive

We give each other the freedom to thrive. To develop ourselves, to have fun and be proud of what we achieve together.

Sail our own course

We dare to take risks and invest in ideas we believe in. To deliver sustainable solutions for people and the environment we work in.

improve

Continue to improve

We build on our successes and continue to improve, refine and develop new applications.

promises

Deliver on promises

We maintain our reputation by doing what we say and delivering what we promise.

Our fleet

Our vessels are designed in-house and equipped with cutting-edge technology that allows us to push the boundaries of heavy lift, pipelay and subsea installation even further.

Pioneering Spirit

The world’s largest and most versatile construction vessel, represents a step change in offshore engineering.

Solitaire

One of the world’s most advance pipelay vessels, consistently setting new standards in pipeline installation.

Audacia

Our most versatile pipelay vessel, optimised for a wide range of installation scopes in all water depths.

Lorelay

The world’s first DP pipelay vessel, delivering unmatched performance and reliability over 4 decades at sea.

Sandpiper

Fully automated anchor-positioned pipelay barge for high-performance shallow water construction operations.

Hidden Gem

The world’s first deep-sea mineral production vessel with seabed-to-surface nodule collection and transport systems.

Fortitude

Advanced offshore support vessel enhanced for complex deep-water installation and construction operations.

Oceanic

State-of-the-art offshore construction support vessel, excelling in jumper, umbilical and subsea structure installations.

Barges

Purpose-built barges to support our record-breaking platform removal and installation operations.

Pipe supply vessels

Dynamic positioned offshore supply vessels, providing a seamless, continuous flow of line pipe and project materials.

blue

carousel

Our equipment

Our vessels are designed in-house and equipped with cutting-edge technology that allows us to push the boundaries of heavy lift, pipelay and subsea installation even further.

Heavy lift equipment

Our industry-defining, motion-compensated lift system provides unmatched capacity and capability in the installation and removal of new and disused offshore platform facilities.

Welding equipment

Our fully automated welding, line-up, and inspection systems set a new benchmark in pipeline production, delivering superior performance, safety, and efficiency.

Coating equipment

Our next-generation field joint coating systems offer unparalleled flexibility and advanced corrosion protection with every application.

Subsea equipment

Our customised state-of-the-art construction, inspection and intervention tools ensure superior workability in even the most challenging subsea environments worldwide.

columns-4x

Pioneer Together

Passionate, innovative and reliable. That’s how we shift the boundaries of offshore technology.

Oceanic kicked off offshore works for the Porthos project

27 March 2025

Sandpiper completes Darwin Pipeline Duplication scope

Sandpiper completes Santos' Darwin Pipeline Duplication scope

27 March 2025

Allseas expands in Brazil with Búzios-10

21 February 2025

Offices and yards

Allseas is a family-owned offshore contractor established in 1985, specialising in pipelay, heavy lift and subsea construction. The company employs approximately 4000 people worldwide.

All offices and yards

Our history

Allseas, founded in January 1985, has developed cutting-edge technology and has moved boundaries. By continuously growing our know-how and expertise, we have developed into a world-leading offshore contractor.

Our history

The beginning

Allseas was founded in January 1985, opening offices in Châtel Saint-Denis, Switzerland, and The Hague, the Netherlands.

Launched a year later (1986), the vessel quickly set a new standard in offshore pipelay, as Allseas gained a strong foothold in the North Sea market specialising in the installation of small-to-medium diameter pipelines.

The company also unveiled its idea for the single-lift installation of large integrated platform topsides with motion compensation (1987).