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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureCivil EngineeringBronschhofenStemba AG
Stemba AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

The core activity of Stemba AG is trenchless deep construction, particularly earth sounding drilling and controlled flushing drilling technology. This includes: earth sounding drilling, controlled flushing drilling technology (horizontal drilling technology), deep construction, house connections using earth rockets and controlled pressing equipment, pipeline detection, PE pipe transport and welding. The company carries out these activities to enable crossings of roads, tracks, intersections, streams, etc. that cannot be carried out or are not permitted using conventional trenching methods.

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Products & services

Industry:Civil Engineering
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Stemba AG

Horticulture & Landscaping
Site Preparation
✓ Offered7
Horizontal drilling (guided wash boring)
Horizontal drilling for underground utility installation, especially under roads, rail tracks, intersections, streams and cultivated land; including planning, GPS surveying and leak-tightness testing.
Ground-source borehole drilling
Ground-source borehole drilling for heating systems to a depth of 500 metres, including connection pipes and pressure testing.
Building service connections
Trenchless building service connections for water, gas, electricity, district heating and sewerage using ground-penetrating radar, pipe-pressing equipment, earth rockets and guided pipe jacking.
Civil engineering (trenching/utility works)
Conventional earthworks and utility pipeline construction in open-trench method, also combined with guided wash boring technology for turnkey projects.
Landscaping
Landscaping work ranging from reinstatement and hedge trimming to new installations.
Utility line locating
Precise locating of power, gas, water, telecom and district heating lines as well as unknown lines and obstacles to a depth of four metres.
PE pipe transport & welding
Transport, ordering, preparation and welding of PE pipes for pulling-in or laying, with certified PE welding competence.
Trust & reputation

ranQ Trust Score of Stemba AG: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 100% · As of October 2026

Stemba AG scores 86.3 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.87.024%
  • 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.73.510%
  • 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.100.08%
Stemba AG scores 76.6 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.79.212%
  • 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%
Stemba 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%
Stemba AG scores 9.6 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 35.9.14%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.10.04%
Qualifications+0.00

Stemba 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 17 customer reviews. 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 17 reviews across all connected sources

Sources
GGoogle517
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

May 28, 2024Media
Stemba AG: Nachhaltigkeit und Innovation im grabenlosen Tiefbau
leaderdigital.ch

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Location

AMP-Strasse 4
9552 Bronschhofen

At a glance

Legal form
Corporation
UID
CHE-422.784.582
Founded
2018 · 8 years
Last commercial register change
June 10, 2022
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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