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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentEnergy SuppliersZofingenStWZ Erdgas und Fernwärme AG
StWZ Erdgas und Fernwärme AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

StWZ Erdgas und Fernwärme AG offers natural gas products, biogas options and district heating along with related energy services. The company’s services also cover electricity, water and building-technology solutions, solar and storage systems, charging infrastructure and customer services such as an online portal and subsidy advice.

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Products & services

Industry:Energy Suppliers
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4.4/5

StWZ Erdgas und Fernwärme AG

✓ Offered3
Natural gas
Natural gas supply for Zofingen and other municipalities in the region; delivery for heating, cooking, hot water, heat and drying processes as well as for use as a fuel.
Biogas
Biogas supply as a renewable gas product; used for heating and other natural gas applications, fed into the natural gas grid, available as a share in the standard product or as a 100% version.
Natural gas/biogas mobility
Fuel offering for natural gas/biogas vehicles; operation of a CNG filling station in Oftringen with a biogas share and price information for the fuel.
Trust & reputation

ranQ Trust Score of StWZ Erdgas und Fernwärme AG: 4.4 out of 5.0

Trust Score4.4/ 5.0

Very high

x

Data basis 96% · As of October 2026

StWZ Erdgas und Fernwärme AG scores 72.7 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.61.224%
  • 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.88.110%
  • 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%
StWZ Erdgas und Fernwärme AG scores 92.3 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.82.07%
StWZ Erdgas und Fernwärme AG 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%
StWZ Erdgas und Fernwärme AG scores 97.1 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 35.97.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

StWZ Erdgas und Fernwärme AG reaches a ranQ Trust Score of 4.4 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.2 out of 5 stars from 31 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
4.2
of 5

Aggregated from 31 reviews across all connected sources

Sources
GGoogle4.231
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Mühlegasse 7
4800 Zofingen
Opening hours
Mon
07:30 - 12:00, 13:30 - 17:00
Tue
07:30 - 12:00, 13:30 - 17:00
Wed
07:30 - 12:00, 13:30 - 17:00
Thu
07:30 - 12:00, 13:30 - 17:00
Fri
07:30 - 12:00, 13:30 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-109.367.252
Founded
2001 · 25 years
Last commercial register change
April 22, 2025
Employees
21 to 50
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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