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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding ConstructionSionAndré Sierro SA
André Sierro SA Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of André Sierro SA primarily encompasses the following areas: Masonry and Concrete (building construction, renovations, and conversions), Civil Engineering (construction of infrastructure such as roads, bridges, etc.), and Real Estate (construction and sale of residential and commercial properties). The company thus offers a wide range of services in the construction sector, from planning and execution of construction projects to the sale of real estate properties.

AI-generated
Offering

Products & services

Industry:Building Construction
✓ Offered3
Masonry and concrete
Masonry and reinforced-concrete structures for commercial buildings, villas, apartment blocks, schools, industrial halls, underground garages, covered parking lots; demolition, renovation and conversion.
Civil engineering
Civil engineering structures for cantonal, municipal and private projects; external works, earthworks, pipework, development of watercourses and bisses, road widening, bituminous surfacings, resurfacing and stabilisation of roads.
Real estate
Construction of turnkey individual homes, building residential buildings for sale under PPE, and income-producing properties.
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4.2/5

André Sierro SA

Trust & reputation

ranQ Trust Score of André Sierro SA: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

André Sierro SA scores 62.6 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.65.024%
  • 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.67.110%
  • 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%
André Sierro SA scores 97.5 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.90.07%
André Sierro SA 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%
André Sierro SA scores 13.4 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 35.13.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

André Sierro SA reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.3 out of 5 stars from 13 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
4.3
of 5

Aggregated from 13 reviews across all connected sources

Sources
GGoogle4.313
★TrustpilotSoon
PProvenExpertSoon

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

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Comparisons

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Location

Route de la Drague 33
1950 Sion

At a glance

Legal form
Corporation
UID
CHE-105.907.557
Founded
1994 · 32 years
Last commercial register change
June 30, 2021
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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