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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint747,212 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureElectrical design engineerTrimmisControlOpen GmbH
ControlOpen GmbH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

ControlOpen GmbH plans, builds, inspects, and commissions electrical systems for power plants, industry, and critical infrastructure. The company also provides statutory electrical inspections, installation management, and support for projects and commissioning.

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Presence

Service area

Offering

Products & services

Industry:Electrical design engineerElectrician
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ControlOpen GmbH

✓ Offered3
Planning and Engineering
Project planning according to SIA, execution projects, digital equipment and installation plans, tenders, specifications, ESTI applications and approval procedures for electrical projects.
Execution and Installation
Site and assembly management, electrical systems construction, 24-hour support and utility assistance for industry, power plants, data centres and critical installations.
Inspections and Commissioning
Commissioning, grid operation, statutory electrical inspections under NIV and final inspections under EN 60204 for electrical installations and machinery.
Trust & reputation

ranQ Trust Score of ControlOpen GmbH: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of November 2026

Without public customer reviews the score stays capped.

ControlOpen GmbH 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.
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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%
ControlOpen GmbH scores 82.0 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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CriterionValueWeight
  • Establishment: Years since founding or brand launch, logarithmic. The maximum is reached at 15 years.97.712%
  • 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%
ControlOpen GmbH scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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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%
ControlOpen GmbH scores 2.6 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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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 35.2.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

ControlOpen GmbH reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, so the score is backed by part of the criteria. As of November 2026.

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

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Location

Galbutz 23
7203 Trimmis

At a glance

Legal form
Limited Liability Company
UID
CHE-291.316.521
Founded
2012 · 14 years
Last commercial register change
February 9, 2012
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • GRTrimmis
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.
88.0
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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