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

About the company

Gruner AG is an independent engineering consultancy providing design and planning services across the building, infrastructure and energy sectors throughout all project phases. Its expertise includes structural and geotechnical engineering, building services design, construction management, energy production/transmission/distribution, road and rail works, water management, environmental and safety engineering, and digital engineering solutions.

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Products & services

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Gruner AG

✓ Offered
12
Client representation and project management
Client representation, project management and client advisory services for new builds, renovations and refurbishments; coordination of design, costs, schedules, quality and project stakeholders.
General planning and site management design
General planning and site management design for new-build, conversion and refurbishment projects; alignment of client, architectural and execution requirements, as well as coordination of technical and construction processes.
Infrastructure planning and engineering
Planning and support for infrastructure projects for rail, roads, bridges, water, energy supply and waste management; from strategy studies and design through construction and operation.
Energy planning and engineering
Planning and consulting for energy projects such as hydropower, dams, grids, solar, wind and geothermal plants; from feasibility studies to commissioning and modernization.
Structural engineering
Structural solutions for buildings and bridges, as well as preservation and value-enhancing measures for existing structures; design, assessment and optimization of load-bearing structures.
Geotechnics
Geotechnical design and consulting for foundations and structures; assessment of the ground conditions, risk evaluation and project-specific solutions with high safety and cost efficiency.
Building services engineering
Integrated concepts for heating, cooling, power and building services over the entire life cycle; simulations for lighting, climate and acoustics, as well as solutions using renewable energies.
Digital Engineering Solutions
BIM-, VDC- and Project-Life-Cycle solutions plus expert consulting for digital design and construction processes; digital workflows, visualization and data-driven decisions.
Environmental planning and consulting
Investigations, analyses and consulting for buildings, roads, tunnels, landfills and public open spaces; comprehensive solutions for environmental issues in projects.
Safety and risk management
Risk assessments, safety analyses and safety concepts for infrastructure, companies, events and people; measures to counter hazards and crises.
Fire protection
Consulting and support in fire protection and building physics for small and large projects; fire protection planning, technical fire protection solutions and related documentation.
Geomatics and spatial planning
Collection, processing and maintenance of spatial data, as well as site development, special-use plans, master plans and urban planning throughout the project lifecycle.
Trust & reputation

ranQ Trust Score of Gruner AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very 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 88.6 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.90.07%
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 53.4 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.6.74%
Qualifications+0.00

Gruner AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very 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

November 9, 2023Media
«Die Schweiz muss sich auf ihre Stärken besinnen»
primenews.ch
June 1, 2023Media
«Es wurde nicht nur eine Strasse gebaut»
affolteranzeiger.ch
April 11, 2020Media
Ich bin optimistisch, dass sich die Delle nach der Krise rasch wieder glättet
espazium.ch

Knowledge

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Location

St. Jakobs-Strasse 199
4052 Basel
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
Corporation
UID
CHE-138.421.310
Founded
2018 · 8 years
Last commercial register change
July 13, 2026
Employees
51 to 100
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.100.03%
    • Full methodology

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