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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSolar & PhotovoltaicsUsterSustech AG
Sustech AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Sustech AG is consulting, planning and measurement in the field of building technology, particularly in the areas of energy, building physics, heating, ventilation, air conditioning, refrigeration and photovoltaics, with the goal of developing and implementing sustainable and energy-efficient solutions for buildings.

AI-generated
Offering

Products & services

Industry:Solar & Photovoltaics
✓ Offered12
Energy consulting
Energy consulting for buildings, including analysis of the current state, assessment of building services and the building envelope, cost estimates, funding and renovation options.
Minergie consulting
Minergie consulting for renovations, replacement new-builds and new builds, with personal advice on benefits, funding and possible implementation according to the Minergie standard.
Initial consultation
Initial consultation before replacing a heating system, including an on-site inspection, advice on renewable heating systems and support in choosing a suitable solution.
Variant comparison
Variant comparison for heating, ventilation and refrigeration systems, with descriptions of the options, cost estimates, profitability calculations as well as advantages and disadvantages.
Monitoring and operating optimisation
Monitoring and operating optimisation of existing systems for early detection of deviations, adjustment of settings and improvement of energy efficiency and cost-effectiveness.
Building services and building envelope planning
Planning of building services and the building envelope for new-build and conversion projects, from strategic planning through tendering and execution planning to specialist construction management.
Heating system planning
Heating system planning for new builds and heating system upgrades with heat pumps, woodchip and pellet boilers, thermal solar installations, district heating and heat distribution systems.
Ventilation planning
Ventilation planning for controlled residential ventilation, exhaust air systems and ventilation systems for office, commercial and industrial buildings, as well as the renovation of existing systems.
Air-conditioning and refrigeration planning
Air-conditioning and refrigeration planning for office air-conditioning, server-room cooling and commercial refrigeration systems, including waste-heat recovery, cold distribution and free cooling.
Photovoltaic planning
Photovoltaic planning for flat-roof, pitched-roof and façade systems, including orientation, shading, profitability calculations, self-consumption optimisation and EVG support.
Building physics and building envelope planning
Building physics and building envelope planning for renovations and new builds, energy performance certification, Minergie certification, acoustic protection compliance, summer heat protection and mould prevention.
Building measurements and analyses
Building measurements and neutral analyses, including temperature logging, air and material moisture, thermal imaging and airtightness testing.
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4.0/5

Sustech AG

Trust & reputation

ranQ Trust Score of Sustech AG: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

Sustech AG scores 55.3 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.59.424%
  • 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.49.510%
  • 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.50.08%
Sustech 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%
Sustech 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%
Sustech AG scores 28.6 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 35.28.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Sustech AG reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 4.0 out of 5 stars from 6 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 6 reviews across all connected sources

Sources
GGoogle46
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Brunnenstrasse 1
8610 Uster
Opening hours
Mon
08:00 - 17:00
Tue
08:00 - 17:00
Wed
08:00 - 17:00
Thu
08:00 - 17:00
Fri
08:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-114.038.251
Founded
2008 · 18 years
Last commercial register change
July 2, 2024
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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