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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsHimmelriedMichel Ostertag GmbH
Michel Ostertag GmbH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

The core activity of Michel Ostertag GmbH is energy consulting, energy planning, photovoltaic systems, building physics and building thermography, particularly in the areas of energetic renovation, energy efficiency and sustainability, heating and solar as well as building physics and building thermography.

AI-generated
Offering

Products & services

Industry:Solar & Photovoltaics
✓ Offered5
Energy consulting
Advisory services for partial and comprehensive energy retrofits, replacement of heating systems, solar installations, GEAK®-Plus, subsidies, and neutral assessment of offers and retrofit proposals.
Energy planning
Energy concepts, energy analyses, feasibility studies and detailed cost-effectiveness assessments for energy retrofits, the building envelope, heating-system replacement and solar installations.
Photovoltaics
Advisory and planning services for photovoltaic systems on roofs or façades, including technical feasibility, yield forecasts, cost-effectiveness considerations and implementation concepts.
Building physics
Building-physics support for new builds and renovations, moisture protection calculations, thermal-bridge calculations, damage assessments, as well as energy and thermal protection documentation.
Building thermography
Building thermography to reveal thermal weak points, locate heating lines, identify building damage and monitor photovoltaic systems.
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4.1/5

Michel Ostertag GmbH

Trust & reputation

ranQ Trust Score of Michel Ostertag GmbH: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

Michel Ostertag GmbH has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
x
CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
Michel Ostertag GmbH scores 83.0 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%
Michel Ostertag GmbH scores 83.3 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).83.322%
Michel Ostertag GmbH 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

Michel Ostertag GmbH reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, 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.

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Location

Burgmattweg 176
4204 Himmelried
Opening hours
Mon
08:00 - 12:00, 13:00 - 17:00
Tue
08:00 - 12:00, 13:00 - 17:00
Wed
08:00 - 12:00, 13:00 - 17:00
Thu
08:00 - 12:00, 13:00 - 17:00
Fri
08:00 - 12:00, 13:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-116.099.482
Founded
2010 · 16 years
Last commercial register change
December 19, 2014
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.
88.0
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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