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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryEnergy & EnvironmentSustainability SectorBiel/BienneProna AG
Prona AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Prona AG is an engineering services provider offering consulting and planning in environmental protection, occupational safety and building physics. Its practice areas include buildings and settlements, industry and commerce, infrastructure and mobility, nature and landscape, and applied research, and it supports clients in the planning and implementation of new-build, maintenance and renovation projects.

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Products & services

Industry:Sustainability Sector
✓ Offered11
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Prona AG

Environmental Impact Assessment (EIA) and Environmental Construction Monitoring (ECM)
Environmental impact assessments, environmental expert reports and concepts, environmental construction monitoring, protective and replacement measures, water protection for property and transport infrastructure projects.
Building Physics
Expertise and strategy development, net-zero and energy strategies, heat and moisture protection, summer thermal protection, building and room acoustics, measurements and verification.
Applied Ecology
Ecological expert reports, field surveys of flora, fauna and habitats, promotion concepts, revitalisation, replacement and compensation measures, green-space management.
Acoustics / Noise
Advisory and support for outdoor noise, noise at the workplace, indoor noise and room acoustics; expert reports, measurements, sound insulation concepts, construction site monitoring and success checks.
Occupational Safety / Health Protection
Hazardous goods and explosion protection concepts, hazard analyses, support for EKAS guideline 6508, safety concepts, site safety and health plans (SiGe), audits, instructions and training.
Soil Protection
Soil surveys, soil samples and assessment, soil protection and utilisation concepts, on-site soil monitoring during construction, recultivation and final reports.
Evidence Preservation and Construction Site Monitoring
Crack logs, condition surveys, vibration measurements, construction and crack monitoring, dust and noise monitoring, settlement and deformation measurements.
Environmental Consulting
Immission measurements, air hygiene, radon measurements, aerial surveys with drones, industrial accident and disaster protection, water protection for properties and transport routes.
GIS / BIM
Support with the planning process, digital planning workflow, 3D models, use of digital building models, simulations, parameter studies and transfer of digital information.
Applied Research
Participation in technical and research groups, support for research projects, project proposals for funding programmes, standards and guidelines, product and process development.
Ergonomics Consulting
Ergonomic workplace assessments, workplace health management (BGM) support, awareness-raising, advisory and training, action plan catalogues, accompaniment and effectiveness review.
Trust & reputation

ranQ Trust Score of Prona AG: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 96% · As of October 2026

Prona AG scores 69.7 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.78.124%
  • 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.49.510%
  • 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.70.08%
Prona AG scores 90.9 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%
Prona 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%
Prona AG scores 74.3 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 35.74.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Prona AG reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 5.0 out of 5 stars from 6 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 6 reviews across all connected sources

Sources
GGoogle56
★TrustpilotSoon
PProvenExpertSoon

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

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Location

Collègegasse 9
2502 Biel/Bienne
Opening hours
Mon
08:00 - 17:00
Tue
08:00 - 17:00
Wed
08:00 - 17:00
Thu
08:00 - 17:00
Fri
08:00 - 17:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-106.082.729
Founded
1991 · 35 years
Last commercial register change
September 18, 2026
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.85.03%
    • Full methodology

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