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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringReinach BlKiefer & Studer AG Geotechniker SIA/USIC
Kiefer & Studer AG Geotechniker SIA/USIC Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Kiefer & Studer AG is a service company specializing in the fields of geotechnics, geology, hydrogeology, environment, and contaminated sites. The company's core activities include: * Geotechnics: Consulting and planning for construction projects, particularly in the areas of foundation engineering and special deep foundation construction * Geology and Hydrogeology: Investigations and consulting on geological and hydrogeological issues, including groundwater modeling and heat utilization * Environment and Contaminated Sites: Consulting and remediation of contaminated sites, soil protection, and infiltration * Building Pollutants: Measurement and monitoring of pollutants in buildings * Geothermal Energy: Planning and implementation of geothermal probes and heat utilization The company offers its services in all phases of construction projects, from feasibility studies to planning, execution, and post-completion monitoring.

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Products & services

Industry:Technical Consulting & Engineering
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4.0/5

Kiefer & Studer AG Geotechniker SIA/USIC

✓ Offered6
Geotechnics
Ground investigations, geotechnical advice and modelling, earth stability calculations, excavation and slope stabilisation, special foundations, specialist construction management and geotechnical monitoring.
Geology & Hydrogeology
Geological field surveys, natural hazard assessment, groundwater and infiltration matters, construction dewatering, groundwater monitoring, groundwater models, protection zones and water intakes.
Geothermal energy
Feasibility and permitting checks, geological and hydrogeological forecasts, sizing of geothermal boreholes and thermal use of groundwater, supervision during execution and monitoring.
Environment & contaminated sites
Investigations under the ordinance on contaminated sites, remediation of contaminated sites, shooting ranges, legislation on contaminated sites, material management, soil protection, soil science support during construction and environmental impact reports.
Building pollutants
Building pollutant surveys prior to demolition, renovation or change of use, remediation and disposal requirements, specialist construction management, remediation documentation and asbestos air measurements.
Measurements & monitoring
Monitoring concepts, condition surveys, inclinometer and extensometer measurements, geodetic measurements, vibration measurements and rock monitoring.
Trust & reputation

ranQ Trust Score of Kiefer & Studer AG Geotechniker SIA/USIC: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

Kiefer & Studer AG Geotechniker SIA/USIC scores 56.6 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.63.324%
  • 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.45.610%
  • 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.50.08%
Kiefer & Studer AG Geotechniker SIA/USIC scores 92.3 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%
Kiefer & Studer AG Geotechniker SIA/USIC 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%
Kiefer & Studer AG Geotechniker SIA/USIC scores 31.4 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 35.31.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Kiefer & Studer AG Geotechniker SIA/USIC reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 4.2 out of 5 stars from 5 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
4.2
of 5

Aggregated from 5 reviews across all connected sources

Sources
GGoogle4.25
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Bruggstrasse 12a
4153 Reinach Bl
Opening hours
Mon
08:00 - 12:00, 13:30 - 18:00
Tue
08:00 - 12:00, 13:30 - 18:00
Wed
08:00 - 12:00, 13:30 - 18:00
Thu
08:00 - 12:00, 13:30 - 18:00
Fri
08:00 - 12:00, 13:30 - 18:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-107.968.742
Founded
1980 · 46 years
Last commercial register change
April 30, 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.100.06%
  • 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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