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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringLenzburgPhoster GmbH
Phoster GmbH Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Phoster GmbH is consulting and implementing biodiversity oases, aquaponics systems, urban gardening and eco-technologies to improve the water quality of water bodies. The company offers products and services to create thriving habitats for humans and nature, including floating islands, raised beds and garden shops.

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Offering

Products & services

Industry:Technical Consulting & EngineeringSustainability Sector
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3.8/5

Phoster GmbH

✓ Offered5
Blue-green infrastructure
Planning of infiltration areas, retention swales and green open spaces for rainwater management, climate adaptation and biodiversity; from analysis through detailed design to implementation.
Water world
Chemical-free improvement of water quality in ponds, lakes and stormwater retention basins with floating islands and eco-technological processes.
Aquaponics
Production of fish and vegetables in a closed water cycle, without soil and without chemicals; from the first system to the greenhouse.
Advisory and project support for rainwater management
Advisory on the sponge city principle, cantonal and national requirements, funding programs, feasibility studies, approval procedures, monitoring and follow-up.
Specialist planning for planning offices
Specialist planning for blue-green infrastructure as input for overall projects, including studies, concepts and support in approval procedures.
Trust & reputation

ranQ Trust Score of Phoster GmbH: 3.8 out of 5.0

Trust Score3.8/ 5.0

High

x

Data basis 96% · As of October 2026

Phoster GmbH scores 49.8 out of 100 points in the Reputation area of the ranQ Trust Score. This area carries 42% of the weighting.
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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%
Phoster GmbH scores 79.8 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.92.512%
  • 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.55.07%
Phoster GmbH 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%
Phoster GmbH scores 37.1 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 35.37.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Phoster GmbH 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 October 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

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Location

Rodungsstrasse 1
5600 Lenzburg
Opening hours
Mon
Closed
Tue
Closed
Wed
Closed
Thu
Closed
Fri
08:00 - 18:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Limited Liability Company
UID
CHE-493.492.302
Founded
2014 · 12 years
Last commercial register change
March 11, 2021
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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