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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureCivil EngineeringWiggenGrabenlos AG
Grabenlos AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Grabenlos AG is trenchless pipeline construction, particularly the laying of pipelines, HDD drilling, directional drilling and earthworks. The company also offers conventional pipeline construction, tightness testing, house connections, water intakes and consulting services. The activities include the construction of pipelines for supply and disposal purposes, such as water pipes, empty pipes for electricity and communication, sewage pipes, gas pipes, district heating pipes and others.

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Products & services

Industry:Civil Engineering
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3.9/5

Grabenlos AG

✓ Offered11
Trenchless pipeline construction
Trenchless pipeline construction for pipe and cable systems, from planning through implementation; using cable ploughing, jet boring, steered pipe jacking, pipe bursting, house connections, and leak tightness testing.
Jet boring
Trenchless installation of pipelines under buildings, roads, squares, bodies of water and in moorland and wet areas; bores over 200 metres in length and up to 500 millimetres in diameter.
Cable ploughing
Cable ploughing for installing one or more pipes up to 450 millimetres in diameter and 1.5 metres in depth, also in steep or low-obstacle terrain.
Steered pipe jacking
Steerable steered pipe jacking using P20 and P80 units for tight space conditions, for example on pavements, in trenches and in cellar rooms.
Pipe bursting
Pipe bursting lining for renewing pipelines that require rehabilitation, without removing them from the ground; suitable for refurbishing existing pipelines with short construction times and minimal traffic disruption.
Conventional pipeline construction
Open-trench works for start and receiving pits, probing of third-party service lines, pipe connections and short open trenches; with tracked excavators also in confined and steep terrain.
Cable and pipe locating
Locating of cables and pipes, determination of bore paths and calculation of elevations and gradients; in addition, pipe inspection with an all-in-one video pipe inspection camera.
Water intakes
Water intakes and intake construction as well as rehabilitation of intakes to ensure excellent water quality; as a complete solution together with trenchless systems up to the building.
Service connections
Service connections as part of turnkey solutions for pipe and cable systems, supplemented by trenchless systems and pipeline construction.
Leak tightness testing
Pressure tests of pipelines, channels and water and gas supply lines in public and private areas; with protocol printout and testing according to DIN EN 1610 and other standards.
Advisory services
Comprehensive advisory services for trenchless pipeline construction, from planning through implementation.
Trust & reputation

ranQ Trust Score of Grabenlos AG: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 96% · As of October 2026

Grabenlos AG scores 69.8 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.80.024%
  • 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.61.010%
  • 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.50.08%
Grabenlos AG scores 63.4 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.39.612%
  • 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%
Grabenlos 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%
Grabenlos AG scores 28.6 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 35.28.64%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Grabenlos AG reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 4.9 out of 5 stars from 10 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
4.9
of 5

Aggregated from 10 reviews across all connected sources

Sources
GGoogle4.910
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Rotgut 5
6192 Wiggen
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-324.860.791
Founded
2024 · 2 years
Last commercial register change
May 28, 2024
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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