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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureCivil EngineeringJonaJMS RISI AG Tief- und Spezialtiefbau
JMS RISI AG Tief- und Spezialtiefbau Logo
Verified· 3 sourcesTrust Score
Summary

About the company

JMS RISI AG Tief- und Spezialtiefbau carries out civil and specialist deep-foundation works, including pile foundations, excavation retaining systems, groundwater lowering, utility installation, demolition and watercourse works. The company provides complete excavation and site-filling services, recycling or disposal of excavated material, and the planning and execution of specialist foundation solutions.

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Products & services

Industry:Civil Engineering
✓ Offered
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4.3/5

JMS RISI AG Tief- und Spezialtiefbau

12
Civil engineering
Civil engineering for soil, rock and humus, including excavation, large construction pits, utility line construction and sewerage works at the Rapperswil-Jona and Baar sites.
Special deep construction
Special deep construction with pile foundations, excavation shoring, groundwater lowering and overall responsibility for construction pits, even in complex geological conditions.
Dismantling and recycling
Dismantling of structures as well as removal, reuse and proper disposal of excavated material, including land restoration and backfilling.
Utility line construction
Utility line construction as part of construction pits and civil engineering work, with solutions for installation and integration of service lines.
Excavation shoring
Excavation shoring with Rühl walls, sheet-pile walls, struts and anchors, and other special applications for securing construction pits and slopes.
Pile foundations
Pile foundations with bored piles, micropiles and driven piles for deep foundations in challenging ground conditions.
Groundwater lowering
Temporary groundwater lowering with filter wells and suitable protective measures to carry out civil engineering and special deep construction work safely.
Water engineering
Water engineering as well as renaturalisation of streams and rivers, including lake and riverbanks, port and bathing facilities, and flood protection.
Soil nailing
Soil nailing for securing slopes and ground conditions, used together with anchors, struts and other special deep construction methods.
Pre-stressed anchors
Pre-stressed anchors for excavation support and geotechnical applications, including protective measures for groundwater protection.
Micropiles
Micropiles for deep foundations and excavation support in densely built-up areas or in geologically difficult conditions.
Special and heavy transports
Special and heavy transports for deploying machinery, materials and site logistics in connection with civil engineering and special deep construction projects.
Trust & reputation

ranQ Trust Score of JMS RISI AG Tief- und Spezialtiefbau: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

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Data basis 96% · As of October 2026

JMS RISI AG Tief- und Spezialtiefbau scores 68.6 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.65.024%
  • 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.76.210%
  • 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.70.08%
JMS RISI AG Tief- und Spezialtiefbau scores 93.9 out of 100 points in the Substance area of the ranQ Trust Score. This area carries 28% of the weighting.
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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.82.07%
JMS RISI AG Tief- und Spezialtiefbau 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%
JMS RISI AG Tief- und Spezialtiefbau scores 100.0 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 35.100.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

JMS RISI AG Tief- und Spezialtiefbau reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.3 out of 5 stars from 19 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
4.3
of 5

Aggregated from 19 reviews across all connected sources

Sources
GGoogle4.319
★TrustpilotSoon
PProvenExpertSoon

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

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Comparisons

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Location

Engelhölzlistrasse 26
8645 Jona
Opening hours
Mon
07:30 - 12:00, 13:30 - 17:00
Tue
07:30 - 12:00, 13:30 - 17:00
Wed
07:30 - 12:00, 13:30 - 17:00
Thu
07:30 - 12:00, 13:30 - 17:00
Fri
07:30 - 12:00, 13:30 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-112.426.731
Founded
2005 · 21 years
Last commercial register change
June 5, 2025
Employees
21 to 50
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.100.06%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.85.03%
    • Full methodology

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