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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,904 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureArchitectBaselon3 AG
on3 AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

on3 AG is an architecture firm providing concept and design work as well as comprehensive planning services for residential, commercial and public buildings. The firm handles all project phases — study and design, cost estimation, execution planning, construction management and handover — and also undertakes renovations, conversions and interior projects; a related company serves as a general contractor for housing developments.

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Service area

Offering

Products & services

Industry:ArchitectGeneral contractor
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3.9/5

on3 AG

✓ Offered3
Architectural planning
Studies, design, cost estimates, detailed planning, implementation and site management for single-family homes, residential and commercial buildings, as well as public structures.
Renovations, conversions and interior fit-out
Renovations, conversions and interior fit-out for residential and commercial buildings, including construction-technical planning and execution.
Housing estate construction as general contracting
General contracting for housing estate construction, developing attractive residential concepts in town and country, and relieving the client.
Trust & reputation

ranQ Trust Score of on3 AG: 3.9 out of 5.0

Trust Score3.9/ 5.0

High

x

Data basis 96% · As of November 2026

on3 AG scores 55.8 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.45.024%
  • 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.55.910%
  • 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.88.08%
on3 AG scores 85.5 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.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%
on3 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%
on3 AG scores 4.3 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 35.4.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

on3 AG reaches a ranQ Trust Score of 3.9 out of 5.0 — rated «High». The rating draws, among other things, on 3.4 out of 5 stars from 8 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
3.4
of 5

Aggregated from 8 reviews across all connected sources

Sources
GGoogle3.48
★TrustpilotSoon
PProvenExpertSoon

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

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Location

St.Johanns-Vorstadt 15
4056 Basel

At a glance

Legal form
Corporation
UID
CHE-313.000.838
Founded
2011 · 15 years
Last commercial register change
May 25, 2020
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • BSBasel
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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