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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentEnergy SuppliersRomanshornRegiotherm AG
Regiotherm AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The company is an energy supplier specializing in the provision of natural gas, biogas, and seawater heat. The core activities include gas procurement and distribution, network construction, maintenance and operation, as well as the provision of services such as heating service, heating repair, and safety checks. In addition, the company also offers products such as instantaneous water heaters and gas stoves.

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Products & services

Industry:Energy Suppliers
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Regiotherm AG

Gas supply
Gas procurement and contract management, energy billing and meter reading, finance and accounting, customer service and master data management, printing and mailing service for municipalities and utilities.
Grid construction & maintenance
Consulting for network expansion, construction and maintenance of pipeline networks for natural gas and water, connection of new supply lines, construction and maintenance of DRM stations, network monitoring and 24/7 on-call service.
Plan information & utility line
Surveying of new lines, maintenance of the pipeline cadastre, site coordination, negotiation of transit rights, as well as information and plans for the routing of gas pipelines for construction projects.
Technical services
Construction of service connections, leak-tightness testing of gas pipeline networks and service connections, gas meter inspections, meter readings, installation checks, PSK, flue gas inspections and official combustion inspections.
Renewable heating
Free on-site initial consultation for single- and multi-family houses, condominium ownership, businesses and administrations to choose suitable renewable heating systems.
Heating systems
Advice, planning, installation and maintenance of gas heating systems, hybrid solutions, heat pumps and hot-water solutions for residential and commercial buildings.
Gas heating
Planning, installation and service of gas heating systems for single-family houses, multi-family houses and commercial properties, including systems with a share of biogas.
Hybrid solutions
Heat pumps with gas heating as a combined heating solution, with advice, planning, installation and service for efficient and future-proof heat supply.
Heat pumps
Advice, planning, installation and maintenance of heat pumps as an efficient heating solution for various building types.
Hot-water solutions
Heat-pump boilers and instantaneous water heaters as hot-water solutions within heating systems.
Heating service
Maintenance of gas heating systems and heating systems to ensure efficiency, longer service life and lower energy costs, including online booking.
Boiler cleaning
Professional cleaning of boilers for clean water and regular maintenance of hot-water systems.
Trust & reputation

ranQ Trust Score of Regiotherm AG: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of October 2026

Regiotherm AG scores 72.0 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.65.024%
  • 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.70.510%
  • 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.95.08%
Regiotherm AG 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%
Regiotherm AG 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%
Regiotherm AG scores 48.6 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 35.48.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Regiotherm AG reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.3 out of 5 stars from 15 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
4.3
of 5

Aggregated from 15 reviews across all connected sources

Sources
GGoogle4.315
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Egnacherweg 6b
8590 Romanshorn
Opening hours
Mon
08:00 - 12:00, 13:30 - 16:30
Tue
08:00 - 12:00, 13:30 - 16:30
Wed
08:00 - 12:00, 13:30 - 16:30
Thu
08:00 - 12:00, 13:30 - 16:30
Fri
08:00 - 12:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-109.289.965
Founded
2001 · 25 years
Last commercial register change
May 29, 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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