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

About the company

DIAM SA is an architecture practice that develops and delivers projects of varying scales and programs, including social housing, housing cooperatives and assisted living for seniors. The practice integrates sustainability considerations from the project outset and emphasises design quality, execution details and cost control in collaboration with clients.

AI-generated
Offering

Products & services

Industry:Architecture Firms
✓ Offered6
Architecture project studies and implementation
Development and implementation of architecture projects of varying scope and programme, with attention to design, build details and cost control.
Promotion of social housing and cooperatives
Promotion of social housing and cooperatives, with resident participation, public interest and conviviality as cornerstones of the projects.
Renovation of buildings
Renovation of the existing real-estate portfolio, including complete renovations of residential buildings and existing structures.
Construction of new housing
Construction of new housing, in particular for residential buildings, cooperatives and housing estates.
Assisted living for seniors
Creation of assisted-living housing that enables seniors to live independently in a pleasant, easily accessible setting.
Participation in architecture competitions
Participation in architecture competitions and juries to examine the relationship with the built environment and contribute to architectural culture.
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3.9/5

DIAM SA

Trust & reputation

ranQ Trust Score of DIAM SA: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 96% · As of October 2026

DIAM SA scores 56.5 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.58.124%
  • 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.78.08%
DIAM SA scores 83.5 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.86.512%
  • 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%
DIAM 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%
DIAM SA scores 28.6 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 35.28.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

DIAM SA reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 3.7 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
3.7
of 5

Aggregated from 3 reviews across all connected sources

Sources
GGoogle3.73
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Rue de Genève 77
1004 Lausanne
Opening hours
Mon
08:30 - 17:30
Tue
08:30 - 17:30
Wed
08:30 - 17:30
Thu
08:30 - 17:30
Fri
08:30 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-328.697.142
Founded
2016 · 10 years
Last commercial register change
July 16, 2024
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.
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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