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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureCivil EngineeringChâtel-St-DenisAllseas Group SA
Allseas Group SA Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Allseas is a leading company in the offshore energy industry, specializing in the planning, design and execution of complex offshore projects. The company's core activities include: offshore pipelay, platform decommissioning, platform transportation and installation, and polymetallic nodule collection. In addition, the company offers a range of services, including design, engineering, construction, operations and project management, to meet the needs of its customers in the offshore energy industry.

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Allseas Group SA

Industry:Civil Engineering
✓ Offered5
Offshore pipelay
Offshore pipelay for natural gas, oil and carbon capture, including subsea pipeline construction, deepwater installation, tie-ins and shore pull-ins using S-lay vessels.
Platform decommissioning
Single-lift removal of offshore platforms and jackets, including transport to shore for disposal or recycling, supported by motion-compensated heavy-lift vessel capability.
Platform transportation and installation
Transport and single-lift installation of offshore platforms, converter stations and substations, with tailored transport-and-installation solutions for large offshore structures.
Polymetallic nodule collection
Collection of polymetallic nodules from the ocean floor, including subsea recovery, vertical riser transport to surface and offloading for onshore processing.
Nuclear
Advanced nuclear power system development based on small modular reactors for offshore vessels and onshore industrial clusters, including HTGR and TRISO-based design work.
Trust & reputation

ranQ Trust Score of Allseas Group SA: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 96% · As of October 2026

Allseas Group SA scores 42.1 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
x
CriterionValueWeight
  • Review quality: The average rating across all connected sources, smoothed against the industry mean. So 5.0 stars from three reviews do not outrank 4.7 from three hundred.0.024%
  • Review volume: The number of reviews across all sources. The scale is logarithmic: the first reviews count the most, and the maximum is reached at 50 reviews.96.810%
  • Review recency: The age of the most recent review. Two-year-old reviews deliberately sit in the middle, because that is normal for Swiss SMEs. Only after three years without a new voice does the value drop markedly.100.08%
Allseas Group SA scores 89.3 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
x
CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.100.012%
  • Company size: The headcount band, researched by ranQ or stated by the company. It is scored in steps rather than by head count, because the data only provides bands.70.07%
Allseas Group SA scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
x
CriterionValueWeight
  • Verification: Official register entry (commercial register with UID or professional-body record, 55 points), confirmed domain (20 points) and confirmed ranQ profile (up to 25 points, depending on completeness).85.022%
Allseas Group SA scores 100.0 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
x
CriterionValueWeight
  • Website authority: Ahrefs' Domain Rating measures, on a scale of 0 to 100, how strongly a website is linked from other websites. For Swiss SMEs the range up to 40 is typical; the maximum is reached at 35.100.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Allseas Group SA reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 1.4 out of 5 stars from 44 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
1.4
of 5

Aggregated from 44 reviews across all connected sources

Sources
GGoogle1.444
★TrustpilotSoon
PProvenExpertSoon

Further sources are added continuously and factored into the ranQ Rating.

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Location

Route de Pra de Plan 18
1618 Châtel-St-Denis

At a glance

Legal form
Corporation
UID
CHE-102.249.083
Founded
1994 · 32 years
Last commercial register change
June 5, 2025
Employees
11 to 20
Legal form: Graded by liability and disclosure. The weight is kept small: a sole proprietorship is not a dubious company, it is just liable differently.
100.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

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