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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,701 companies indexed · Last updated: today
DirectoryIndustryPlastics IndustryRamseiRotaver Composites AG
Rotaver Composites AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

The core activity of Rotaver Composites AG is the manufacture and distribution of glass fiber reinforced plastic (GRP) products for various industries such as food, chemicals, environment, water, agriculture, sports and leisure. This includes, among others: Special containers and silos for the storage of liquids and bulk materials; Process vessels and plants for the chemical and pharmaceutical industries; Bioreactors and filters for environmental technology; Protective housings and structures for machines and plants; Advertising media and carriers for the telecommunications and advertising industries; Sports and leisure facilities such as light domes and other special facilities. The company also offers services such as planning, design, manufacturing and assembly of GRP products.

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Offering

Products & services

Industry:Plastics Industry
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4.3/5

Rotaver Composites AG

✓ Offered12
Wound new silos
New exterior and interior silos made of GFRP using the filament winding process, manufactured to customer specifications for agricultural engineering and silo construction.
Centrifugally cast silos
GFRP exterior silos and GFRP interior silos manufactured by the centrifugal process as standard and grab-loader silos, designed for different silo solutions.
Rainwater harvesting
Complete solutions for rainwater systems for using rainwater and saving drinking water.
Potable and non-potable water reservoirs
Manufacturing and supply of potable and non-potable water reservoirs with the required components according to customer requirements.
Well chambers
Shafts, tanks and connecting pipes for spring intakes and for the construction of well chambers.
Wastewater / faecal / retention tanks and containers
GFRP tanks and containers for wastewater, faecal matter and retention, for underground installation or above-ground placement.
Biological sand filter systems
Biological wastewater treatment plants and small sand filter treatment systems for wastewater treatment in rural areas.
Heating oil tanks (underground storage)
Three-wall, underground oil tanks with interstitial tank space monitoring and a vacuum leak alarm device.
Pellet tanks and silos
Pellet tanks and silos in various designs and sizes for storing pellets.
Storage containers
GFRP storage containers with chemical resistance and mechanical properties for various applications.
Bulk material silos
Silos for bulk or spreading goods for dry storage outdoors, without rust or condensate formation.
Process tanks
Process tanks for continuous and safe processes, including in composite construction with other thermoplastics.
Trust & reputation

ranQ Trust Score of Rotaver Composites AG: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of October 2026

Rotaver Composites AG scores 79.8 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.77.024%
  • 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.70.510%
  • 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.100.08%
Rotaver Composites AG scores 89.3 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.70.07%
Rotaver Composites AG 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%
Rotaver Composites AG scores 11.7 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 35.11.74%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Rotaver Composites AG reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.7 out of 5 stars from 15 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
4.7
of 5

Aggregated from 15 reviews across all connected sources

Sources
GGoogle4.715
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Emmentalstrasse 100
3435 Ramsei
Opening hours
Mon
07:00 - 12:00, 13:00 - 17:15
Tue
07:00 - 12:00, 13:00 - 17:15
Wed
07:00 - 12:00, 13:00 - 17:15
Thu
07:00 - 12:00, 13:00 - 17:15
Fri
07:00 - 12:00, 13:00 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-108.590.847
Founded
1997 · 29 years
Last commercial register change
February 3, 2025
Employees
11 to 20
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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