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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureCivil EngineeringEinsiedelnZehnder Spezialbau AG
Zehnder Spezialbau AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Zehnder Spezialbau AG is the execution of specialized deep foundation work, particularly in the area of drilling and ramming for the installation of pipelines and other underground infrastructure. This includes, among other things: * Ramming: The installation of pipelines by ramming steel pipes into the ground. * Auger boring: The installation of pipelines by drilling and pressing pipes into the ground. * Long-hole drilling in rock: The execution of drilling for the installation of pipelines in rocky ground. * Guided boring: The installation of pipelines by pressing pipes into the ground using guided boring methods. * Soil displacement with earth rockets: The installation of pipelines by displacing the soil with an earth rocket. * Core drilling: The execution of drilling for the installation of pipelines in various soil types. * Pipe ramming: The installation of steel pipes by ramming them into the ground. The company carries out these works for various clients, including energy network and water supply companies.

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Products & services

Industry:Civil Engineering
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4.0/5

Zehnder Spezialbau AG

✓ Offered8
Impact pipe jacking
Steel pipe jacking for crossing under roads, rail facilities, buildings and rivers; steel pipes up to 4,000 mm diameter and 50 m length, also for underpasses and pipe shells.
Press drilling
Low-emission press drilling method for urban areas; for crossing under roads, motorways and railway tracks, with pipe diameters up to 1,200 mm and lengths up to 80 m.
Long-hole drilling in rock
Vibration-free core drilling up to 580 mm diameter and 50 m length, combinable with impact pipe jacking.
Guided pipe jacking P80
Trenchless, guided long-distance installation of ducts up to 50 m and up to 200 mm diameter in displaceable soils.
Earth-rocket pipe jacking
Pipe jacking with a pneumatically driven earth rocket; pull-in of plastic pipes up to 125 mm diameter, up to 20 m length, for trenchless road crossings and house connections.
Core drilling
Core drilling of any type up to 1,000 mm diameter.
Pipe bursting
Renewal of old pipelines using rope pipe bursting Terra-Extractor X 300 C; DN 34–220 mm, lengths up to 120 m, new pipes with outer diameters of 63–160 mm.
Driving steel beams
Impact driving work for steel beams; listed as a separate service, with documented site examples in the gallery.
Trust & reputation

ranQ Trust Score of Zehnder Spezialbau AG: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

Zehnder Spezialbau AG scores 59.3 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.75.024%
  • 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.40.910%
  • 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%
Zehnder Spezialbau AG scores 87.2 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.70.07%
Zehnder Spezialbau 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%
Zehnder Spezialbau AG scores 4.3 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 35.4.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Zehnder Spezialbau AG reaches a ranQ Trust Score of 4.0 out of 5.0 — rated «High». The rating draws, among other things, on 5.0 out of 5 stars from 4 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 4 reviews across all connected sources

Sources
GGoogle54
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Schnabelsbergstrasse 21
8840 Einsiedeln
Opening hours
Mon
07:00 - 17:00
Tue
07:00 - 17:00
Wed
07:00 - 17:00
Thu
07:00 - 17:00
Fri
07:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-318.061.184
Founded
2013 · 13 years
Last commercial register change
December 27, 2023
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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