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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureOwner's RepresentativeZurichGruner AG
Gruner AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

Gruner AG is an independent engineering consultancy providing planning and engineering services in building construction, infrastructure and energy. Its services include structural and geotechnical engineering, building services design, water resource and transport infrastructure engineering, environmental and safety engineering, and digital engineering across project phases.

AI-generated
Offering

Products & services

Industry:Owner's Representative
✓ Offered10
Client representation
Client representation for new-build, renovation and refurbishment projects; coordination of planning and execution, cost, schedule and quality control as well as interface management.
Fire protection
Fire protection consulting and planning for projects of any size; fire protection training on fire alarm systems, fire event control systems, smoke extraction systems, fire department access routes and current regulations.
Building services engineering
Building services engineering for the entire life cycle of buildings; concepts for heating, cooling and electricity, and integrated planning with architecture, structural engineering and use requirements.
Overall planning
Overall planning and lead design for new-build, renovation and refurbishment projects; coordination of specialist disciplines, alignment between client and architecture.
Structural planning
Structural planning for buildings and bridges; load-bearing structure solutions for demanding architecture as well as measures for preserving and increasing the value of existing buildings.
Geotechnics
Geotechnics and fundamentals for foundation engineering; assessment of the subsoil and risk- and cost-efficient solutions for demanding construction projects.
Infrastructure construction
Infrastructure construction for transport and utilities; planning and consulting for roads, rail, electricity, water, district heating and gas networks.
Environment
Environmental investigations, analysis and consulting for buildings, roads, tunnels, landfills and public open space; development of comprehensive solutions for projects.
Security
Security engineering and management for infrastructure, companies and events; risk analyses, hazard assessment and measures for crisis prevention.
Spatial planning
Spatial planning with site developments, special-use zoning plans and master plans; consulting for project owners and support for participatory processes.
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4.0/5

Gruner AG

Trust & reputation

ranQ Trust Score of Gruner AG: 4.0 out of 5.0

Trust Score4.0/ 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 78.2 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.79.212%
  • 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 4.0 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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Location

Thurgauerstrasse 80
8050 Zurich
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-383.721.340
Founded
2018 · 8 years
Last commercial register change
June 4, 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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