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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentEnergy SuppliersLausanneSI-REN SA
SI-REN SA Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of SI-REN SA is the development and production of renewable energy, particularly through the use of solar energy, wind energy, biomass and geothermal energy, with the aim of ensuring the energy supply of the Lausanne region and promoting environmental protection.

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Offering

Products & services

Industry:Energy SuppliersSolar & Photovoltaics
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4.0/5

SI-REN SA

✓ Offered4
Solar
Solar contracting, financing, construction and operation of photovoltaic power plants on buildings owned by third parties; resale of the electricity produced to the building’s users and injection of the surplus into the grid.
Wind
Project development of EolJorat Sud and participation in wind farms in Switzerland and abroad, including RhôneEole and Montéole SAS.
Biomass
Participation in Palézieux Bio-énergies SA, installation of biogas with combined heat and power generating electricity and heat for the farm, residents and the nearby school.
Geothermal energy
Participation in AGEPP SA and project for operating heat from a deep aquifer to produce thermal and electrical energy via combined heat and power.
Trust & reputation

ranQ Trust Score of SI-REN SA: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

SI-REN 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%
SI-REN SA scores 89.3 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.70.07%
SI-REN 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%
SI-REN SA scores 80.0 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 35.80.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

SI-REN SA reaches a ranQ Trust Score of 4.0 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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Comparisons

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Location

Place Chauderon 27
1003 Lausanne
Opening hours
Mon
08:30 - 17:00
Tue
08:30 - 17:00
Wed
08:30 - 17:00
Thu
08:30 - 17:00
Fri
08:30 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-115.284.717
Founded
2009 · 17 years
Last commercial register change
June 5, 2026
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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