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

About the company

HEFTI. HESS. MARTIGNONI. St. Gallen AG is a building-services engineering firm providing electrical and multidisciplinary building-technology planning (HLKSE+), offering services such as energy supply, HVAC/PL engineering, building automation, lighting design, photovoltaics and fire protection for building and infrastructure projects.

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Products & services

Industry:Technical Consulting & Engineering
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HEFTI. HESS. MARTIGNONI. St. Gallen AG

Integrated Building Services (HLKSE+)
Integrated building services planning for building and infrastructure projects, including HLKSE+, energy supply, lighting concepts, building automation and fire protection planning.
HVAC Engineering
HVAC engineering for building and infrastructure projects, with project-specific solutions for heating, ventilation, air conditioning and sanitary services.
Electrical Engineering
Electrical engineering for building and infrastructure projects, as part of building services planning and in coordination with other technical disciplines.
Building Automation
Design of building automation as part of integrated building services solutions for new-build and infrastructure projects.
Overall Coordination/BIM
Overall coordination and BIM methods for planning, coordination and implementation of technical building and infrastructure projects.
Energy Supply
Planning of energy supply solutions for buildings and infrastructure, aligned with project requirements and technical boundary conditions.
Photovoltaics
Planning of photovoltaic systems as part of energy-oriented building services and infrastructure projects.
E-Mobility
Planning of e-mobility solutions, in particular in connection with electrical infrastructure and building services.
Lighting Concepts
Planning of lighting concepts for buildings and facilities, including topics related to light and light pollution.
Security/Door Engineering
Planning of security and door engineering solutions as part of technical building equipment.
Fire Protection Planning
Fire protection planning for building and infrastructure projects as part of integrated building services.
Infrastructure Engineering
Technical engineering for infrastructure projects, including rail, airports, data centres and power plants.
Trust & reputation

ranQ Trust Score of HEFTI. HESS. MARTIGNONI. St. Gallen 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. St. Gallen 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. St. Gallen 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. St. Gallen 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. St. Gallen 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. St. Gallen 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

Ikarusstrasse 9
9015 St. Gallen
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-295.431.730
Founded
2011 · 15 years
Last commercial register change
August 13, 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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