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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryIndustryElectrical IndustrySeftigenTelma AG
Telma AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

Telma AG is a competence centre for industrial electronics offering custom electronic solutions including consulting, product development, industrialisation, manufacturing and life-cycle management. The company also supplies proprietary products such as leak detectors, optical warning systems, water-disinfection units, level controllers and transducers, and provides EMS/contract manufacturing as well as testing and maintenance services.

AI-generated
Offering

Products & services

Industry:Electrical Industry
✓ Offered12
Customer-specific electronics
Consulting, development, industrialisation, manufacturing, maintenance and life-cycle management for customer-specific electronics; including prototypes, documentation, test systems and series launch.
EMS contract manufacturing
Contract manufacturing for electronic assemblies with AVOR/PPS, procurement, SMD and THT assembly, soldering, assembly, wiring, testing and maintenance.
Analysis and redesign of electronic control
Analysis and redesign of electronic control units, with optimisation of function, application and costs as well as functional extensions, reengineering and replacement of obsolete components.
Initial consultation for electronics projects
Initial consultation for electronics projects, showing technical options, cost-saving potentials, requirements specification, performance definition and cost breakdown.
Product development
Product development with circuit design, PCB layout, software development, prototypes, system tests, field tests and technical documentation.
Industrialisation
Industrialisation for series-ready electronics with component releases, CAM data, manufacturing documents, production aids as well as sample and series release.
Life-cycle management
Life-cycle management with redesign, reengineering, end-of-life management and obsolete management for ongoing product optimisation and safeguarding investment.
Water leak detectors
Water leak detectors for leak detection and water-related applications; listed on the website as a product group with associated applications.
Optical warning systems
Optical warning systems for industrial applications; listed on the website both as a product group and as a specific application.
Water disinfection
Water disinfection as a product group for water-related industrial applications.
Level controllers
Level controllers for level monitoring and control; listed on the website as both product and application group.
Measuring transducers
Measuring transducers for industrial measurement technology; listed as a product group in the product range.
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4.2/5

Telma AG

Trust & reputation

ranQ Trust Score of Telma AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 100% · As of October 2026

Telma AG scores 67.6 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.73.324%
  • 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%
Telma 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%
Telma 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%
Telma AG scores 50.0 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 35.80.04%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.20.04%
Qualifications+0.00

Telma AG reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.8 out of 5 stars from 5 customer reviews. As of October 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

Reviews

Aggregated rating

Aggregated rating
4.8
of 5

Aggregated from 5 reviews across all connected sources

Sources
GGoogle4.85
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

July 27, 2021Media
Telma AG Seftigen - Neuer Standort und neuer Chef
bernerzeitung.ch
July 26, 2021Media
Telma mit Umzug und bevorstehendem Generationenwechsel
technische-rundschau.ch

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Location

Telmaweg 2
3662 Seftigen
Opening hours
Mon
08:00 - 12:00, 13:30 - 17:00
Tue
08:00 - 12:00, 13:30 - 17:00
Wed
08:00 - 12:00, 13:30 - 17:00
Thu
08:00 - 12:00, 13:30 - 17:00
Fri
08:00 - 12:00, 13:30 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-107.809.552
Founded
1975 · 51 years
Last commercial register change
August 6, 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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