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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint747,212 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureArchitectHerisaustco ag
stco ag Logo
Verified· 3 sourcesTrust Score
Summary

About the company

stco ag provides construction management, architectural planning and general contracting services, including client representation, site management and project controlling. Services cover project preparation, feasibility studies, execution planning and construction supervision for building projects.

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Service area

Offering

Products & services

Industry:ArchitectConstruction manager
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3.6/5

stco ag

Owner's representation
✓ Offered5
Client advisory and representation
Project preparation, organisation of architectural competitions, feasibility studies, client support from evaluation to submission, cost calculations and renovation concepts.
Architectural planning
Design concepts, feasibility studies, project planning, building permit submissions and detailed execution planning for new-build projects, conversions and renovations; including land search and site analyses.
General contracting and in-house projects
Delivery of projects on a fixed price and fixed dates; in-house projects from land purchase through construction to sale.
Project and construction management
Site supervision, overall construction management, project and comprehensive management, tenders, scheduling, as well as monitoring and linking planning and implementation.
Controlling
Project monitoring, client fiduciary services, client-side representation, coordination of specialists and ensuring quality, cost and deadline targets.
Trust & reputation

ranQ Trust Score of stco ag: 3.6 out of 5.0

Trust Score3.6/ 5.0

Solid

x

Data basis 96% · As of November 2026

stco ag scores 37.1 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.41.724%
  • 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.27.910%
  • 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.35.08%
stco 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.86.512%
  • 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.70.07%
stco 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%
stco ag scores 7.1 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 35.7.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

stco ag reaches a ranQ Trust Score of 3.6 out of 5.0 — rated «Solid». The rating draws, among other things, on 1.5 out of 5 stars from 2 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
1.5
of 5

Aggregated from 2 reviews across all connected sources

Sources
GGoogle1.52
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Bahnhofstrasse 6
9100 Herisau

At a glance

Legal form
Corporation
UID
CHE-199.327.545
Founded
2016 · 10 years
Last commercial register change
April 14, 2021
Employees
11 to 20

Active in 1 of 26 cantons

  • ARAppenzell Outer Rhodes
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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