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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,765 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureBuilding ConstructionSolothurnA & I GmbH
A & I GmbH Logo
Verified· 2 sourcesTrust Score
Summary

About the company

A & I GmbH is a planning and expert consultancy offering planning and engineering services, structural calculations and construction supervision, together with construction quality assurance, energy consulting and issuance of energy performance certificates.

AI-generated
Offering

Products & services

Industry:Building Construction
✓ Offered9
Planning and engineering services
Design, building permit, structural engineering and construction supervision for new builds, conversions and renovations; for residential homes and commercial buildings, including site analysis, detailed planning, tendering and execution.
Energy consultation and energy certificate
Energy consultation for residential buildings, non-residential buildings, monuments and SMEs; energy audit, energy management, retrofit concepts and issuance of energy certificates.
On-site quality assurance and controlling
Quality control and controlling during construction for new builds and renovations; review of execution, risks, defects and deviations as well as early documentation and recommendations for action.
Property purchase advisory
Site walk-through and advisory before purchasing a property; assessment of structural calculations, building physics, building services, defects, need for renovation and purchase price using measuring equipment.
Funding and KfW expert
Advisory on funding from the federal government, states and municipalities; completing and confirming KfW forms as well as guidance on KfW funds and funding programmes.
Expert reports and specialists
Expert reports on defects, damages and market value of buildings; building-diagnostic consulting as well as arbitration and mediation in disputes.
Technical due diligence (TDD)
Technical inspection of real estate prior to purchase; assessment of the plot, building fabric, building services, maintenance and building regulations to evaluate opportunities and risks.
Measurement technology
Use of measurement technology for non-destructive assessment of building fabric and causes of damage; including moisture, sound, thermography, U-value, blower-door and drone measurements.
Seminars
Seminars and in-house trainings on a range of topics; on request also as lecturer directly within companies.
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4.1/5

A & I GmbH

Trust & reputation

ranQ Trust Score of A & I GmbH: 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.

A & I GmbH 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%
A & I GmbH scores 83.0 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.55.07%
A & I GmbH scores 83.3 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).83.322%
A & I GmbH scores 2.9 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 35.2.94%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

A & I GmbH 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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Comparisons

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Location

Weissensteinstrasse 105
4500 Solothurn

At a glance

Legal form
Limited Liability Company
UID
CHE-111.712.499
Founded
2004 · 22 years
Last commercial register change
February 22, 2016
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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