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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureCivil Engineering FirmsZurichHOLINGER AG
HOLINGER AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

HOLINGER AG is an engineering firm that develops solutions for the water cycle and provides planning and consulting services in wastewater, water supply, hydraulic engineering, construction, energy, industry, digital planning (BIM) and environmental sustainability.

AI-generated
Offering

Products & services

Industry:Civil Engineering Firms
✓ Offered8
Water supply
Planning, project development and delivery of facilities in the water supply sector; facilities and service pipework construction, drinking water treatment, operational support, strategic water supply planning, quality assurance and protection zones.
Wastewater
Conceptual design, planning and construction of wastewater treatment plants and industrial or municipal wastewater facilities; upgrading, operating optimisation, micro-pollutant elimination, sludge recovery and new builds.
Urban drainage
Rainwater management, sponge city and blue-green infrastructure, drainage concepts, sewer systems and special structures, hydraulics, network management and monitoring campaigns.
Construction
Planning of structural measures in water, infrastructure, building and industrial construction; excavation pit planning, special deep foundations, structural engineering design, construction of service lines, preservation of assets, fire protection and earthquake assessment.
Water engineering
Development of fundamentals, flood protection, revitalisation, defining river corridor space, river maintenance, emergency planning, surface runoff analyses and aquatic ecology studies.
Energy
Area supply systems, energy storage, heating centres and cooling plants, power stations as well as special plants for heat, cold, electricity and process energy.
Digital planning
BIM, GIS and CAD services including management, coordination, modelling, integrated data management, 3D modelling, visualisations and network information systems.
Environment & sustainability
Financing models, contaminated site investigations, building pollutants, environmental impact assessment, environmental construction monitoring, sustainability consulting, groundwater development and groundwater protection zones.
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4.0/5

HOLINGER AG

Trust & reputation

ranQ Trust Score of HOLINGER AG: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

HOLINGER AG scores 53.8 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.70.824%
  • 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.27.910%
  • 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.35.08%
HOLINGER AG scores 87.1 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.100.012%
  • 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%
HOLINGER 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%
HOLINGER AG scores 100.0 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: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

HOLINGER AG reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 2 customer reviews. The data basis is 96%, so the score is backed by part of the criteria. As of October 2026.

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

Reviews

Aggregated rating

Aggregated rating
5
of 5

Aggregated from 2 reviews across all connected sources

Sources
GGoogle52
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Neugasse 136
8005 Zurich
Opening hours
Mon
08:00 - 18:00
Tue
08:00 - 18:00
Wed
08:00 - 18:00
Thu
08:00 - 18:00
Fri
08:00 - 18:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Branch
UID
CHE-305.011.136
Founded
2008 · 18 years
Last commercial register change
September 5, 2023
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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