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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,765 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureOwner's RepresentativeZugGruner AG
Gruner AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

Gruner AG is an independent engineering and planning consultancy offering comprehensive engineering design and planning services in the areas of building construction, infrastructure and energy. Its services cover all project phases from strategic planning to commissioning and include competencies such as structural design, geotechnical engineering, building services, energy systems, infrastructure engineering and environmental engineering.

AI-generated
Offering

Products & services

Industry:Owner's Representative
✓ Offered12
Client representation
Client representation for building and infrastructure projects, including planning, execution and delivery of projects from Zug.
Infrastructure planning
Infrastructure planning for civil underground works, structural engineering, road construction, water engineering, urban water management, as well as realization and maintenance of infrastructure.
Building design
Building design for projects in the building sector, including project planning, execution and delivery within the regional site network of Central Switzerland.
Road construction
Road construction for infrastructure projects, including rehabilitation, development and structural delivery in public areas.
Bridge construction
Bridge construction for infrastructure projects, from planning to delivery of special structures and bridge works.
Water engineering
Water engineering for infrastructure projects, including planning and delivery in the field of waterways and water engineering facilities.
Urban water management
Urban water management within infrastructure projects, addressing pipework and drainage issues in the built-up area.
Infrastructure realization and maintenance
Realization and maintenance of infrastructure, including planning, delivery and maintenance tasks for existing facilities and projects.
Infrastructure construction
Infrastructure construction for transport, utility network and water-related facilities, as well as other infrastructure projects.
Special structures
Special structures in connection with infrastructure projects, in particular bridges and other special civil engineering structures.
Fire protection
Fire protection as part of the Zug service overview for building and infrastructure projects.
Environment
Environment-related services in connection with building and infrastructure projects, in addition to technical planning and delivery.
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3.9/5

Gruner AG

Trust & reputation

ranQ Trust Score of Gruner AG: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 100% · As of October 2026

Gruner AG scores 65.5 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.60.924%
  • 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.52.910%
  • 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.95.08%
Gruner AG scores 65.7 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.50.012%
  • 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.82.07%
Gruner AG scores 86.7 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).86.722%
Gruner AG scores 50.0 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: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.0.04%
Qualifications+0.00

Gruner AG reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 4.1 out of 5 stars from 7 customer reviews. As of October 2026.

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

Reviews

Aggregated rating

Aggregated rating
4.1
of 5

Aggregated from 7 reviews across all connected sources

Sources
GGoogle4.17
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

June 1, 2023Media
«Es wurde nicht nur eine Strasse gebaut»
affolteranzeiger.ch

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Comparisons

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Location

Chamerstrasse 170
6300 Zug
Opening hours
Mon
08:00 - 12:00, 13:00 - 17:00
Tue
08:00 - 12:00, 13:00 - 17:00
Wed
08:00 - 12:00, 13:00 - 17:00
Thu
08:00 - 12:00, 13:00 - 17:00
Fri
08:00 - 12:00, 13:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Branch
UID
CHE-431.069.716
Founded
2023 · 3 years
Last commercial register change
January 22, 2026
Employees
21 to 50
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.
76.0
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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