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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureSpecialized Construction ActivitiesSiebnenKoi World Gmbh
Koi World Gmbh Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Koi World GmbH is the planning, consulting, construction and maintenance of swimming ponds, koi ponds, natural ponds and hydrolysis pools, as well as the sale of Japanese koi fish.

AI-generated
Offering

Products & services

Industry:Specialized Construction Activities
✓ Offered6
Pond Construction
Pond systems from planning through implementation, for natural ponds and koi ponds; including pond sealing, pond edging, filtration, pumps and piping.
Swimming Pond and Pool Construction
Swimming ponds, biopools, classic pools and MODAQ systems; with consultation, planning, installation and optional maintenance by service partners.
Repairs and Maintenance
Checks of equipment, water values and filtration systems, plus medical checks; holiday cover with feeding, observation and technical inspections.
Consultation and Planning
On-site consultation, individual project planning and coordination for swimming ponds, biopools and koi ponds; aligned with budget and construction execution.
Koi and Pond Fish
Koi, sterlet and other pond fish; from beginner fish to selected animals, plus mussels and noble crayfish available on request.
Polyurea Coatings
SPU and polyurea coatings for swimming ponds, pools, industry, garages, basements, stables, roofs and terraces; seamless, UV- and weather-resistant.
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4.3/5

Koi World Gmbh

Trust & reputation

ranQ Trust Score of Koi World Gmbh: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of October 2026

Koi World Gmbh scores 81.4 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.81.424%
  • 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.76.210%
  • 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%
Koi World Gmbh scores 83.0 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.55.07%
Koi World Gmbh 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%
Koi World Gmbh scores 10.3 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 35.10.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Koi World Gmbh reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.8 out of 5 stars from 19 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
4.8
of 5

Aggregated from 19 reviews across all connected sources

Sources
GGoogle4.819
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Comparisons

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Location

Fabrikstrasse 28
8854 Siebnen
Opening hours
Mon
17:00 - 19:00
Tue
Closed
Wed
17:00 - 19:00
Thu
Closed
Fri
17:00 - 19:00
Sat
08:30 - 12:00
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-113.774.703
Founded
2007 · 19 years
Last commercial register change
January 6, 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.
88.0
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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