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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint747,212 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding services engineerWallisellenVoltarra Group AG
Voltarra Group AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Voltarra Group AG is a European design, engineering and construction partner for data centres and other technically complex environments. Its services include design and build, building-services engineering, data-centre fit-outs, infrastructure upgrades, testing, commissioning and handover.

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Service area

Offering

Products & services

Industry:Building services engineerConstruction manager
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Voltarra Group AG

General contractor
✓ Offered9
Data Centre Design & Build
Single-point accountability for design, procurement, construction and commissioning of data centres and complex technical environments through operational handover.
Construction Management
Procurement and coordination of specialist trade packages under one controlled programme for complex, phased and fast-track projects.
M&E Design
Coordinated mechanical, electrical and public-health design focused on capacity, resilience, compliance, buildability, maintainability and commissioning.
White Space Fit-Out
Fit-out of data-hall spaces including rack layouts, containment, power distribution, cooling, structured cabling and supporting systems.
Critical Infrastructure Upgrades
Upgrades of power, cooling and resilience systems, plus asset-replacement and lifecycle projects around live operational requirements.
Professional Services
Feasibility studies, technical due diligence, condition and capacity reviews, cost planning, programme development and delivery advice for complex capital projects.
Facilities Audit
Condition, capacity, resilience and lifecycle assessments of existing technical facilities, turned into prioritised recommendations and investment plans.
Testing & Commissioning
Testing and commissioning strategies with factory testing, system testing, integrated systems testing, load-bank testing and operational handover.
Backbone™ Project Delivery Method
Eight-stage delivery method from feasibility to close-out for controlling cost, programme and risk in complex data centre projects.
Trust & reputation

ranQ Trust Score of Voltarra Group AG

Trust Score

No score yet

x

A published score requires a data basis of at least 50% and data from at least two criteria groups other than identity. Missing evidence: Review quality, Review volume, Review recency, Media authority

Data basis 54% · As of November 2026

Voltarra Group AG has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
x
CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Voltarra Group AG scores 42.7 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.0.012%
  • 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.55.07%
Voltarra Group AG 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%
Voltarra Group AG scores 0.0 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 35.0.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%

The data basis is 54%, below the threshold at which ranQ publishes a score. Evidence is missing for: Review quality, Review volume, Review recency, Media authority. As of November 2026.

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

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Location

Richtistrasse 2
8304 Wallisellen

At a glance

Legal form
Corporation
UID
CHE-377.875.779
Founded
2026 · 0 years
Last commercial register change
June 5, 2026
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • ZHWallisellen
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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