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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringBaselTomasetti AG
Tomasetti AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Tomasetti AG designs and installs heating and building services systems and provides planning, project management, installation and maintenance. The company offers energy consulting including an Impulsberatung for heating replacement, evaluates technical and economic options, and implements renewable systems (solar, pellets, heat pumps) as well as heat distribution solutions such as underfloor heating and radiators.

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Offering

Products & services

Industry:Technical Consulting & EngineeringPlumbing & Building Services
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4.0/5

Tomasetti AG

✓ Offered5
Heating system refurbishment
Consulting, planning, coordination and execution of heating system refurbishments for new builds and existing properties; including permits, subsidies, dismantling, installation and service.
Service & maintenance of heating systems
Service, maintenance and fault rectification for radiators, heating centres, pumps, valves, thermostats and boiler inspections; including reminders, heat measurements and consumption clarifications.
Energy consulting
Analysis of the building envelope and building services, evaluation of energy flows and consumption, conception of new energy systems, variants with cost estimates and feasibility studies.
Free initial consultation
Neutral, free initial consultation for boiler/heating replacement with an on-site meeting, collection of heating data, cost-benefit analysis and product-neutral system recommendation.
Renovation concept and project coordination for properties
Renovation concepts with comparison of variants, coordination of all trades, on-site organisation, calls for tenders, as well as management and recording of new systems.
Trust & reputation

ranQ Trust Score of Tomasetti AG: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

Tomasetti AG scores 61.9 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.63.324%
  • 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.45.610%
  • 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.78.08%
Tomasetti AG scores 85.5 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%
Tomasetti 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%
Tomasetti AG scores 4.3 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 35.4.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Tomasetti AG reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 4.2 out of 5 stars from 5 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 5 reviews across all connected sources

Sources
GGoogle4.25
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Breisacherstrasse 54
4057 Basel
Opening hours
Mon
07:00 - 12:00, 13:15 - 16:30
Tue
07:00 - 12:00, 13:15 - 16:30
Wed
07:00 - 12:00, 13:15 - 16:30
Thu
07:00 - 12:00, 13:15 - 16:30
Fri
07:00 - 12:00, 13:15 - 16:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-105.952.322
Founded
1983 · 43 years
Last commercial register change
January 22, 2026
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.
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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