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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringAbtwil SgOst Energie GmbH
Ost Energie GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Ost Energie GmbH is the optimization and efficiency enhancement of buildings and their technical systems, particularly in the area of energy efficiency. This includes planning, consulting and implementing measures to reduce energy costs and emissions, as well as improving comfort and monitoring building performance. In addition, the company also offers services in the field of e-mobility, such as planning charging infrastructure and consulting on the implementation of sustainable mobility solutions.

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Offering

Products & services

Industry:Technical Consulting & Engineering
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3.9/5

Ost Energie GmbH

✓ Offered6
Operational optimisation
Operational optimisation for heating, ventilation and refrigeration systems; tailored to building use, reduction of energy costs and emissions, improved comfort, monitoring of building performance.
Monitoring
Monitoring of building performance and energy costs; tracking via energy bills and heating degree days, transparent control of consumption and savings.
Client advisory
Advisory for clients on energy-efficient building services; support for heating modernisations, replacement of building management systems and development of tailor-made metering concepts.
Energy concepts
Energy concepts for energy-efficient building services; advice on heating modernisations, building management systems and metering concepts as part of construction and renovation projects.
Solar systems
Design of solar systems; cost review in offers, calculation of payback periods and advice on implementation of ZEV or EVG solutions.
E-mobility
Charging infrastructure planning for sustainable mobility; review of quotations, grant applications and advisory for owners and property management companies.
Trust & reputation

ranQ Trust Score of Ost Energie GmbH: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 96% · As of October 2026

Ost Energie GmbH scores 61.2 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.60.724%
  • 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.40.910%
  • 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%
Ost Energie GmbH scores 72.3 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.75.012%
  • 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%
Ost Energie GmbH scores 85.0 out of 100 points in the Identity area of the ranQ Trust Score. This area carries 22% of the weighting.
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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%
Ost Energie GmbH scores 1.4 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 35.1.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Ost Energie GmbH reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 4.0 out of 5 stars from 4 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
4
of 5

Aggregated from 4 reviews across all connected sources

Sources
GGoogle44
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Rossweidstrasse 21b
9030 Abtwil Sg

At a glance

Legal form
Limited Liability Company
UID
CHE-452.767.967
Founded
2019 · 7 years
Last commercial register change
September 19, 2019
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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