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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding MaintenanceBiel/BienneAssena S.A.
Assena S.A. Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Assena SA is the remediation and decontamination of buildings, particularly in the area of asbestos, PCB, lead and radon. The company offers innovative and cost-effective solutions for the removal and encapsulation of these pollutants in buildings, in order to protect the health of residents and workers.

AI-generated
Offering

Products & services

Industry:Building Maintenance
✓ Offered4
Asbestos remediation
Asbestos diagnosis, removal of asbestos-containing materials and remediation work with special equipment for buildings, renovations, conversions and demolition projects.
PCB remediation
Remediation or encapsulation of PCB-contaminated joints and seals, as well as replacement of affected sealants in public and private buildings.
Lead remediation
Removal or encapsulation of lead paint in buildings with equipment according to the state of the art, especially in older buildings from before the 1950s.
Radon remediation
Radon remediation systems in buildings, with sustainable and cost-effective solutions to reduce radon levels in indoor areas.
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4.2/5

Assena S.A.

Trust & reputation

ranQ Trust Score of Assena S.A.: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

Assena S.A. scores 63.8 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.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.88.08%
Assena S.A. scores 93.9 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%
Assena S.A. 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%
Assena S.A. scores 34.3 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 35.34.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Assena S.A. reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very 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

Alexander-Moser-Strasse 76
2503 Biel/Bienne
Opening hours
Mon
08:00 - 12:00, 13:00 - 17:00
Tue
08:00 - 12:00, 13:30 - 17:00
Wed
08:00 - 12:00, 13:00 - 17:00
Thu
08:00 - 12:00, 13:00 - 17:00
Fri
08:00 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-115.119.780
Founded
2009 · 17 years
Last commercial register change
November 24, 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.
100.0
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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