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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,544 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureArchitecture FirmsGenevaAlterego Concept SA
Alterego Concept SA Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Alterego Concept SA provides environmental consulting and construction site management, offering tailored technical solutions for building and real-estate projects from design through execution. Services include asbestos diagnostics and removal (DT), deconstruction and demolition, environmental impact and risk studies, site environmental monitoring (waste, water, air, noise), recycling and valorisation, eco-construction and carbon/LCA assessments, pollution diagnostics, remediation concepts and geological/hydrogeological studies.

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Products & services

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4.0/5

Alterego Concept SA

✓ Offered8
Environmental consultancy and works supervision
Environmental consultancy and supervision of works for construction projects, with tailored technical solutions and control of risks, costs and deadlines.
Asbestos diagnostics and asbestos removal
Asbestos diagnostics, DT for asbestos removal, support for deconstruction and demolition within construction projects.
Impact studies and risk studies
Environmental impact study and OPAM risk study to secure projects and address regulatory issues.
Environmental site monitoring
Environmental monitoring of waste, water, air and noise, with recycling and recovery of materials.
Eco-construction and sustainable construction
Eco-construction, choice of materials, carbon footprint, life-cycle assessment, energy concept and support for sustainable construction.
Site contamination assessment and remediation
Site contamination diagnostics, financial estimation of land, remediation concept and DT remediation, sorting of soils and monitoring of earthworks.
Applied geology and hydrogeology
Geology and hydrogeology for site analysis, monitoring of earthworks and remediation projects.
Acquisition and sale of real estate and land
Acquisition and sale of real estate and land within projects, supporting design and execution.
Trust & reputation

ranQ Trust Score of Alterego Concept SA: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

Alterego Concept SA scores 58.5 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.49.510%
  • 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%
Alterego Concept SA scores 85.5 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.55.07%
Alterego Concept 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%
Alterego Concept SA scores 13.7 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 35.13.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Alterego Concept SA reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 4.3 out of 5 stars from 6 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 6 reviews across all connected sources

Sources
GGoogle4.36
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Rue de Lyon 93
1203 Geneva

At a glance

Legal form
Corporation
UID
CHE-116.061.700
Founded
2010 · 16 years
Last commercial register change
October 21, 2024
Employees
1 to 10
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.70.03%
    • Full methodology

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