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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureCivil Engineering FirmsRomanshornRibi + Blum AG
Ribi + Blum AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Ribi + Blum AG is an engineering and planning firm offering structural engineering as well as civil and traffic planning services. The company provides planning across all project phases including execution, with expertise in special foundations, steel structures, building preservation, technical expert reports and sewerage systems.

AI-generated
Offering

Products & services

Industry:Civil Engineering Firms
✓ Offered9
Structural engineering for buildings
Structural engineering for all types of buildings, including design of excavation pits and special foundations; planning services for all design phases up to and including execution.
Expert reports, preservation and restoration of buildings
Expert reports in structural engineering, condition assessments, measures planning and repairs; also restoration measures, advice and upgrading of existing structures.
Steel construction
Optimised structural engineering, project management, drawings and documents as well as structural calculations; expert reports on damage cases, condition assessments, restoration measures and advice.
BIM
BIM method as part of the digitisation strategy for processes and collaboration in the construction industry.
Urban drainage
Sewer and pipeline construction, dimensioning of pipe systems and special structures, stormwater drainage, retention and infiltration systems, and renovations of existing pipe systems.
Utility networks and site access
Planning, construction, restoration and support for utility networks and site access from the preliminary project stage to complete connection and servicing.
Road construction
Planning and delivery of new road construction and road rehabilitation for private, municipal and cantonal clients.
Harbour facilities and water engineering
Harbour facilities and water engineering as a dedicated area within the civil engineering offering.
Traffic planning
Site access and parking in the transport field; planning solutions for access and parking facilities.
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4.0/5

Ribi + Blum AG

Trust & reputation

ranQ Trust Score of Ribi + Blum AG: 4.0 out of 5.0

Trust Score4.0/ 5.0

High

x

Data basis 96% · As of October 2026

Ribi + Blum AG scores 49.8 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.68.224%
  • 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.17.610%
  • 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.35.08%
Ribi + Blum AG scores 95.0 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.82.07%
Ribi + Blum 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%
Ribi + Blum AG scores 57.1 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 35.57.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Ribi + Blum 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 1 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 1 reviews across all connected sources

Sources
GGoogle51
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Konsumhof 3
8590 Romanshorn
Opening hours
Mon
07:00 - 17:30
Tue
07:00 - 17:30
Wed
07:00 - 17:30
Thu
07:00 - 17:30
Fri
07:00 - 17:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-113.313.609
Founded
2006 · 20 years
Last commercial register change
February 3, 2026
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.
100.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.95.03%
    • Full methodology

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