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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryFinance & InsuranceHolding CompaniesWil SgDemke Holding GmbH
Demke Holding GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Demke Holding GmbH designs and manufactures DC/DC converters and power-electronic modules, providing standard and custom solutions as well as development services. The product range includes non-isolated and isolated buck/boost converters, THT variants and configurable DC/DC modules for applications such as e-mobility, robotics, material handling and rail systems.

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Products & services

Industry:Holding Companies
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3.8/5

Demke Holding GmbH

6
DC/DC converters
Robust, custom DC/DC converters for industrial applications, available for PCB and wall mounting, from 1 to 1000 W, with galvanic isolation, functional isolation or without isolation.
Development services
Consulting, project management, research and development, prototyping and serial production for custom DC/DC converters and power electronics.
DC/DC buck converters
Buck converters from 5 to 1000 W for input voltages from 6 to 170 V and output voltages from 3.3 to 48 V, for wall and PCB mounting.
DC/DC buck-boost converters
Buck-boost converters up to 600 W for input voltages from 6 to 70 V and output voltages from 12 to 29 V, with wall mounting and custom adaptations.
isolated DC/DC buck-boost converters
Isolated buck-boost converters up to 800 W for input voltages from 6 to 160 V and output voltages from 5 to 200 V, for PCB and wall mounting.
Isolated DC/DC THT mount
Isolated DC/DC converters for THT PCB mounting from 3 to 30 W, with input voltages from 8 to 36 V and output voltages from 3.3 to 24 V.
Trust & reputation

ranQ Trust Score of Demke Holding GmbH: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of October 2026

Demke Holding GmbH scores 49.8 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
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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.68.224%
  • 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.17.610%
  • 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.35.08%
Demke Holding GmbH scores 80.9 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.95.212%
  • 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%
Demke Holding GmbH 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%
Demke Holding GmbH scores 22.9 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 35.22.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Demke Holding GmbH reaches a ranQ Trust Score of 3.8 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 1 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 1 reviews across all connected sources

Sources
GGoogle51
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Tonhallestrasse 37
9500 Wil Sg
Opening hours
Mon
08:30 - 16:00
Tue
08:30 - 16:30
Wed
08:30 - 16:00
Thu
08:30 - 16:30
Fri
08:00 - 12:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-286.215.713
Founded
2013 · 13 years
Last commercial register change
October 6, 2021
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.
88.0
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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