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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsPregassonaGreenkey SA
Greenkey SA Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Greenkey is the planning, installation and consulting of photovoltaic systems for families, companies and communities, including energy analysis and optimization.

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4.5/5

Greenkey SA

Products & services

Industry:Solar & Photovoltaics
✓ Offered7
Photovoltaic systems
Photovoltaic systems for roofs of any size and configuration, for private individuals and businesses, with design, installation and optimisation of self-consumption.
Energy storage and electric mobility
Battery storage, charging for electric cars and integration with photovoltaic systems to manage and optimise energy in a single solution.
Energy management and energy analyses
Energy management systems, detailed energy analyses of the building and customised solutions to improve efficiency and self-consumption.
System cleaning, after-sales services and assessments
System cleaning, after-sales services and assessments for photovoltaic installations, with technical support and complementary interventions.
Studies and advisory for public bodies
Neutral advisory for photovoltaic systems of municipalities, cantons, associations and communities, with feasibility studies, specifications, review of tenders and project supervision.
Design and support for community PV installations
Site study, calculation of the installable capacity, drafting of tenders, supervision of installation and final verification of existing systems.
Group purchasing for PV systems
Coordination among organisations for collective purchasing of photovoltaic modules, with technical support and more advantageous supply conditions.
Trust & reputation

ranQ Trust Score of Greenkey SA: 4.5 out of 5.0

Trust Score4.5/ 5.0

Excellent

x

Data basis 96% · As of October 2026

Greenkey SA scores 87.9 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.90.024%
  • 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.82.910%
  • 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%
Greenkey SA scores 88.8 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.95.212%
  • 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%
Greenkey 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%
Greenkey SA scores 45.7 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 35.45.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Greenkey SA reaches a ranQ Trust Score of 4.5 out of 5.0 — rated «Excellent». The rating draws, among other things, on 5.0 out of 5 stars from 25 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 25 reviews across all connected sources

Sources
GGoogle525
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Via Ceresio 45
6963 Pregassona
Opening hours
Mon
09:00 - 17:00
Tue
09:00 - 17:00
Wed
09:00 - 17:00
Thu
09:00 - 17:00
Fri
09:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-443.006.674
Founded
2013 · 13 years
Last commercial register change
June 30, 2025
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.85.03%
    • Full methodology

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