ranQ
ranQ
ranQ
DirectoryIndustriesPlacesKnowledgeComparisonsSoon
Sign inCheck visibility
ranQHSG Startup LabelRecognised by the
HSG Startup Label

The leading AI company directory, built to boost AI visibility.

DEENFRIT
Product
  • Pricing
  • Directory
  • Industries
  • Trust Score
Company
  • About
  • Partner program
  • Contact
  • Legal
© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,952 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureInterior fit-outUnterstammheimStefan Keller Holzbau AG
Stefan Keller Holzbau AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Stefan Keller Holzbau AG is a timber construction business carrying out a range of woodwork projects. Its work includes timber structures, stairs, interior finishing, façades, cellulose insulation, forest cabins and boatbuilding.

AI-generated
Presence

Service area

Offering

Products & services

Industry:Interior fit-outTimber construction
LeadhubOutbound Leads by COHAGA

Looking for direct email addresses and phone numbers?

Leadhub delivers verified contact details and decision-makers from over 750,000 Swiss companies — management, procurement, marketing, HR.

Discover Leadhub
3.8/5

Stefan Keller Holzbau AG

✓ Offered8
Timber construction
Timber construction work of all kinds, including timber structures, staircases, interior fit-out, facades and cellulose insulation.
Staircase construction
Staircases in many variations, including complete wooden staircase systems.
Interior fit-out
Interior fit-out in timber construction, as part of carpentry work and general timber construction work.
Facade construction
Facades in timber construction, including wooden facades and related exterior components.
Cellulose insulation
Cellulose insulation as insulation material for timber construction and refurbishment work.
Exhibition stand construction
Exhibition stand construction throughout Switzerland, as mentioned in the company history as an early activity.
Boatbuilding
Boatbuilding as a specialized timber construction area, with documented work in the photo gallery.
Woodland hut construction
Woodland huts in timber construction, as another field of experience of the company.
Trust & reputation

ranQ Trust Score of Stefan Keller Holzbau AG: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of November 2026

Stefan Keller Holzbau 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%
Stefan Keller Holzbau AG scores 83.5 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.55.07%
Stefan Keller Holzbau AG scores 86.7 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).86.722%
Stefan Keller Holzbau AG scores 5.1 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 35.5.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Stefan Keller Holzbau AG reaches a ranQ Trust Score of 3.8 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 November 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

No knowledge articles yet

Once Stefan Keller Holzbau AG has claimed this profile, we'll publish editorial articles and case studies here together.

Get started
Comparisons

Stefan Keller Holzbau AG in comparison

Soon

Industry comparisons are coming soon

We're preparing industry comparisons that rank Stefan Keller Holzbau AG by reviews, experience and specialisations.

Is this your company?

Claim the company profile of Stefan Keller Holzbau AG to make its contact details visible. With a plan we additionally create and publish industry comparisons, articles and much more.

Secure profile

Location

Untergasse 5
8476 Unterstammheim

At a glance

Legal form
Corporation
UID
CHE-318.749.352
Founded
2013 · 13 years
Last commercial register change
June 25, 2025
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • ZHStammheim
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

    Similar companies

    DF
    Dekorationsbau Felix AG
    Embrach
    IG
    ihrzimmermann.ch GmbH
    Mettmenstetten
    MG
    Marbora GmbH
    Winterthur
    SS
    Schreinerei Scharrenberg GmbH
    Mönchaltorf
    SH
    Schreinerei Herter GmbH
    Birmensdorf Zh
    HH
    Hardmeier Holzbau AG
    Zumikon
    SB
    Signia Bauunternehmen GmbH
    Dietlikon
    SB
    Schreinerei Blattmann GmbH
    Rüti Zh