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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,887 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringAarauHEFTI. HESS. MARTIGNONI. Aarau AG
HEFTI. HESS. MARTIGNONI. Aarau AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

HEFTI. HESS. MARTIGNONI. Aarau AG provides engineering and building-services planning, including overall building-technology (HLKSE+), MEP and electrical engineering, with competencies in building automation, energy supply, photovoltaics, e-mobility, lighting, safety and fire protection.

AI-generated
Offering

Products & services

Industry:Technical Consulting & Engineering
✓ Offered8
Overall building services engineering (HLKSE+)
Overall building services engineering for building construction and infrastructure projects, with tailored solutions from defining the framework conditions to implementation in different project sizes.
HLKS engineering
HLKS engineering for building construction and infrastructure projects, as part of building services design and in conjunction with energy supply, building automation and fire protection planning.
Electrical engineering
Electrical engineering for building construction and infrastructure projects, with project-specific solutions for technical design and execution within building services.
Building automation
Building automation for the technical control of buildings, integrated into the overall design together with HLKSE+, energy supply, lighting concepts and fire protection planning.
Overall coordination/BIM
Overall coordination and BIM methods for planning and delivering projects, including alignment of costs, schedules and interfaces.
Energy supply
Planning of energy supply for building and infrastructure projects, as part of tailored building services solutions and cross-project technical consulting.
Lighting design
Product-neutral lighting concepts for indoor and outdoor areas, considering design, cost efficiency, sustainability, standards and light pollution.
Fire protection planning
Fire protection planning as part of building services design, integrated into the project-specific overall design and aligned with technical, regulatory and energy-related requirements.
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4.1/5

HEFTI. HESS. MARTIGNONI. Aarau AG

Trust & reputation

ranQ Trust Score of HEFTI. HESS. MARTIGNONI. Aarau AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 54% · As of October 2026

Without public customer reviews the score stays capped.

HEFTI. HESS. MARTIGNONI. Aarau AG has no value in the Reputation area of the ranQ Trust Score because no data is available. The area carries 42% of the weighting and drops out of the calculation for this profile; it does not lower the score, only the reported data basis.
x
CriterionValueWeight
  • Review quality: No data point — the criterion is taken out of the weighting and does not lower the score.—24%
  • Review volume: No data point — the criterion is taken out of the weighting and does not lower the score.—10%
  • Review recency: No data point — the criterion is taken out of the weighting and does not lower the score.—8%
HEFTI. HESS. MARTIGNONI. Aarau AG scores 95.8 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.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.96.07%
HEFTI. HESS. MARTIGNONI. Aarau 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%
HEFTI. HESS. MARTIGNONI. Aarau AG scores 94.3 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 35.94.34%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

HEFTI. HESS. MARTIGNONI. Aarau AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». No public customer reviews are available for this provider; the rating is based on the remaining criteria. The data basis is 54%, 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.

Knowledge

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Location

Neumattstrasse 13
5000 Aarau
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-108.095.594
Founded
1999 · 27 years
Last commercial register change
July 22, 2026
Employees
101 to 500
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.100.06%
  • 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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