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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryRetail & CommerceAutomotive & Vehicle TradeGrüningenSee-Garage Portmann AG
See-Garage Portmann AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of See-Garage Portmann AG is the restoration, maintenance, revision and sale of classic automobiles. The company also offers additional services such as transportation, appraisals and consulting related to historic vehicles.

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Offering

Products & services

Industry:Automotive & Vehicle Trade
✓ Offered8
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See-Garage Portmann AG

Maintenance
Regular maintenance of classic vehicles to preserve value and ensure operational safety, including checks of brakes, shock absorbers and steering as well as an engine check.
Overhaul
Overhauls of engines and gearboxes of any make and age, with opening of the units, damage analysis, and a detailed quote based on labour and materials.
Restoration
Partial and full restorations of classic automobiles according to high quality standards, preferably with original parts, with support in vehicle selection and project supervision.
Motorsport
Preparation and overhaul of race cars, on-site support with support vehicles, as well as advice on acquisition, rebuild and the required licences.
Transport
Transport of vehicles, handling of transport, insurance and customs formalities for purchases from abroad, as well as local registration of the classic.
Expert report
Valuation and condition reports for classic automobiles to provide certainty for buying, selling and insurance-related matters, on request with independent experts.
Advisory
Individual advice regarding classic automobiles, based on many years of experience and the full range of services offered by the company.
Buying and selling of classic automobiles
Searching for, buying, selling and brokering classic automobiles, supported by an international network and a partner company.
Trust & reputation

ranQ Trust Score of See-Garage Portmann AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

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Data basis 58% · As of October 2026

Without public customer reviews the score stays capped.

See-Garage Portmann AG has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
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CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
See-Garage Portmann AG scores 85.5 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.55.07%
See-Garage Portmann AG 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%
See-Garage Portmann AG scores 8.6 out of 100 points in the Visibility area of the ranQ Trust Score. This area carries 8% of the weighting.
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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 35.17.14%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.0.04%
Qualifications+0.00

See-Garage Portmann AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 58%, 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.

Press

Media

August 18, 2024Media
In diesem Hotel in Grüningen checken Oldtimer ein
zo-online.ch

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Location

Industriestrasse 3
8627 Grüningen

At a glance

Legal form
Corporation
UID
CHE-114.719.368
Founded
2009 · 17 years
Last commercial register change
November 8, 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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