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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint746,904 companies indexed · Last updated: today
DirectoryConstruction & ArchitectureSpecialist foundation engineeringUznachBolt Erdwärme AG
Bolt Erdwärme AG Logo
Verified· 2 sourcesTrust Score
Summary

About the company

Bolt Erdwärme AG offers the GRD drilling system and performs radial‑angled boreholes for the installation of geothermal probes. The company provides planning and execution of drilling works including building connections, handles permits and funding applications, and advises together with partners on heat pump technology.

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Products & services

Industry:Specialist foundation engineering
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Bolt Erdwärme AG

✓ Offered5
Geothermal probe and GRD drilling
Geothermal probe installation using the GRD system, drilled radially and at an angle, including installations beneath buildings; planning and execution of drilling works with building connection.
Geothermal project planning
Planning of geothermal systems with review of site plans, energy demand and basement plans, plus support already during the planning phase.
Drilling project execution and commissioning
Execution of drilling works, including proper instruction and on-time implementation of the system.
Permit and subsidy support
Support with official permits and with applications for subsidies for geothermal systems.
Heat pump consulting
Consulting on heat pump technology in cooperation with specialist partners in connection with geothermal systems.
Trust & reputation

ranQ Trust Score of Bolt Erdwärme AG

Trust Score

No score yet

x

A published score requires a data basis of at least 50% and data from at least two criteria groups other than identity. Missing evidence: Review quality, Review volume, Review recency, Media authority

Data basis 54% · As of November 2026

Bolt Erdwärme 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%
Bolt Erdwärme AG scores 85.5 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%
Bolt Erdwärme AG scores 86.7 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).86.722%
Bolt Erdwärme AG scores 0.0 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 35.0.04%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%

The data basis is 54%, below the threshold at which ranQ publishes a score. Evidence is missing for: Review quality, Review volume, Review recency, Media authority. As of November 2026.

The Trust Score cannot be bought and is calculated from publicly verifiable data.

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Location

Lindenstrasse 10
8730 Uznach

At a glance

Legal form
Corporation
UID
CHE-114.730.269
Founded
2009 · 17 years
Last commercial register change
March 5, 2009
Employees
1 to 10

Active in 1 of 26 cantons · 1 municipality

  • SGUznach
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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