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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryIndustryManufacture of IT HardwareRümlanggreenteg AG
greenteg AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of greenTEG AG is the development and manufacture of innovative products and solutions in the fields of thermoelectrics, sensor technology and materials science. The company focuses on the research and development of products such as calera, uval, ray and gSKIN, which are used in various application areas such as health, sports, occupational safety, building technology and photonics.

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Offering

Products & services

Industry:Manufacture of IT HardwareMedical Technology Industry
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greenteg AG

✓ Offered7
OEM integration
OEM integration for wearables and medical applications with Calera® sensing, algorithm integration, development support, and connectivity to mobile devices as well as medically certified cloud solutions.
calera® Health
Non-invasive core body temperature measurement solutions for patient monitoring, women's health and baby sleep tracking, with continuous data and sensor integration.
calera® Sports
Wearables for sport and heat training with continuous core temperature measurement, support for thermoregulation and data for performance optimisation.
uval® Building
Measurement solutions for U-values and heat transfer in buildings, for assessing insulation, renovation planning, damage analysis and acceptance testing.
ray® Photonics
Sensor solutions for laser power and beam position with precise, wavelength-independent measurement for laser systems, wattmeters and positioning systems.
gSKIN® R&D
Highly sensitive heat flux sensors for research and industry, for measuring thermal properties in materials research, chemistry, aerospace and other applications.
Calera Research
Research solution for continuous, non-invasive core temperature measurement with sensor, skin temperature sensor, algorithm integration and research support.
Trust & reputation

ranQ Trust Score of greenteg AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 96% · As of October 2026

greenteg AG scores 63.1 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.78.124%
  • 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.35.08%
greenteg 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%
greenteg 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%
greenteg AG scores 100.0 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 35.100.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

greenteg AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 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
5
of 5

Aggregated from 6 reviews across all connected sources

Sources
GGoogle56
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Hier entsteht die Karte
Hofwisenstrasse 50a
8153 Rümlang
Opening hours
Mon
09:00 - 19:00
Tue
09:00 - 19:00
Wed
09:00 - 19:00
Thu
09:00 - 19:00
Fri
09:00 - 19:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-114.960.906
Founded
2009 · 17 years
Last commercial register change
September 6, 2024
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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