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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryFinance & InsuranceExternal Asset ManagementDuillierGamma Partners SA
Gamma Partners SA Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Gamma Partners SA provides services for real estate and construction projects, including owner representation, delegated project management, preparation of tender dossiers, project planning and coordination, cost control, architecture and site supervision.

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Products & services

Industry:External Asset Management
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Gamma Partners SA

7
Delegated project ownership (DMO)
Delegated project ownership, representation of the client/contracting authority, preparation of tender dossiers, organisation of architecture competitions and public tenders.
Architecture
Architecture from development to execution, with concept definition, feasibility studies, client specifications, detailed descriptions and project optimisation.
Construction management
Construction management, site leadership, overall coordination of the parties involved, technical monitoring, management and quality control until the project is completed.
Project steering and management
Steering, management and project management, planning and overall coordination, control of budgets and schedules, analysis and optimisation of results.
Feasibility studies and investment optimisation
Feasibility studies, technical analysis, upstream advisory, investment optimisation and real-estate value enhancement for construction projects.
Tenders and architecture competitions
Preparation of tender dossiers for general or total contractors, organisation of competitions according to SIA 142 and tenders for public contracts.
Development and delivery of real-estate projects
Development and delivery of real-estate projects, from design to execution, with coordination of the appointed parties and search for technical and financial partners.
Trust & reputation

ranQ Trust Score of Gamma Partners SA: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 96% · As of October 2026

Gamma Partners SA scores 49.8 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.68.224%
  • 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.17.610%
  • 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.35.08%
Gamma Partners 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%
Gamma Partners 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%
Gamma Partners SA scores 22.9 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 35.22.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Gamma Partners SA reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 1 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 1 reviews across all connected sources

Sources
GGoogle51
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Chemin de Panlièvre 7
1266 Duillier
Opening hours
Mon
08:00 - 17:30
Tue
08:00 - 17:30
Wed
08:00 - 17:30
Thu
08:00 - 17:30
Fri
08:00 - 15:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-114.964.726
Founded
2009 · 17 years
Last commercial register change
May 31, 2023
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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