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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringAarauqsi Engineering GmbH
qsi Engineering GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

qsi Engineering GmbH is an engineering firm focused on structural design for residential, industrial and commercial buildings. Its services also include civil engineering planning, excavation and excavation support, earthquake analyses, crack surveys, and structural assessments for mobile communication sites and solar installations.

AI-generated
Offering

Products & services

Industry:Technical Consulting & Engineering
✓ Offered4
Building construction
Engineering services for building construction: advice during the preliminary project, quantities for estimating, cost estimates and preliminary costings, structural calculations for concrete, steel and timber, as well as detailed design and specialist construction management.
Civil engineering
Engineering services for civil engineering: planning of excavations, excavation support, roads and drainage, preliminary project consulting, quantities for estimating, cost estimates and site management.
Mobile communications, photovoltaic and wind power plants
Services for rooftop and greenfield sites: site inspections, consulting and structural reports, structural calculations, assessment of roof load-bearing safety, ballasting, special solutions and specialist construction management.
Special tasks
Additional engineering services: earthquake analyses with priority lists, cost estimates and repair concepts, condition investigations of existing parking garage ceilings, crack surveys of roads and buildings for evidence documentation.
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4.0/5

qsi Engineering GmbH

Trust & reputation

ranQ Trust Score of qsi Engineering GmbH: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

qsi Engineering GmbH scores 56.8 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.73.124%
  • 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.35.310%
  • 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%
qsi Engineering GmbH scores 87.3 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.97.712%
  • 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.70.07%
qsi Engineering GmbH 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%
qsi Engineering GmbH scores 2.3 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 35.2.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

qsi Engineering GmbH 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 3 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 3 reviews across all connected sources

Sources
GGoogle53
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Sengelbachweg 4
5000 Aarau
Opening hours
Mon
08:00 - 17:00
Tue
08:00 - 17:00
Wed
08:00 - 17:00
Thu
08:00 - 17:00
Fri
08:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-133.162.928
Founded
2012 · 14 years
Last commercial register change
June 12, 2025
Employees
11 to 20
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.
88.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.85.03%
    • Full methodology

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