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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryIndustryElectrical IndustrySurseeSigmatic Guido Sieger
Sigmatic Guido Sieger Logo
Verified· 4 sourcesTrust Score
Summary

About the company

Sigmatic Guido Sieger provides products and services for heating, cooling, solar and building automation for residential and commercial installations. Offerings include heat pumps, wood heating, solar systems, battery storage, engineering, switchgear construction and maintenance services.

AI-generated
Offering

Products & services

Industry:Electrical Industry
✓ Offered12
Heat pump
Heat pumps for new builds and renovations, using air, ground or water; advice, design and installation for residential and commercial properties.
Wood heating
Wood heating systems with split logs, pellets or wood chips for single-family homes, agricultural businesses and commercial properties.
District heating
District heating systems and transfer stations for local and district-heating networks, for multi-family houses, public buildings and other larger facilities.
Heat storage
Heat storage units for storing surplus heat from heating systems, solar thermal installations or heat pumps and for delivering it as needed.
Water heater
Water heaters for combination with solar thermal, heat pumps or boilers, with storage technology and insulation to reduce energy losses.
Solar installation
Photovoltaic and solar-thermal solutions for electricity and heat, including advice, design, installation, subsidy application and commissioning.
ZEV
Community for self-consumption for multi-family houses and commercial units, including planning, implementation and management.
E-mobility
Intelligent charging solutions for electric vehicles, from private wallboxes to expandable charging infrastructure for company fleets.
Battery storage
Battery storage for storing excess energy for later use, also as an addition to solar installations or as a backup system.
Multi-function façade
Multi-function façade for harnessing solar power directly from the building envelope.
Building automation
Automation solutions for heating, ventilation, air conditioning, lighting and access systems, including advice, system integration, installation, commissioning, training and maintenance.
Switchgear construction
Planning, fabrication, documentation, assembly and commissioning of switchgear with an in-house workshop, including service and maintenance.
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4.2/5

Sigmatic Guido Sieger

Trust & reputation

ranQ Trust Score of Sigmatic Guido Sieger: 4.2 out of 5.0

Trust Score4.2/ 5.0

Very high

x

Data basis 100% · As of October 2026

Sigmatic Guido Sieger scores 79.4 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.75.024%
  • 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.77.410%
  • 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.95.08%
Sigmatic Guido Sieger scores 78.5 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%
Sigmatic Guido Sieger 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%
Sigmatic Guido Sieger scores 44.3 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 35.88.64%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.0.04%
Qualifications+0.00

Sigmatic Guido Sieger reaches a ranQ Trust Score of 4.2 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.6 out of 5 stars from 20 customer reviews. As of October 2026.

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

Reviews

Aggregated rating

Aggregated rating
4.6
of 5

Aggregated from 20 reviews across all connected sources

Sources
GGoogle4.620
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

December 28, 2023Media
Von der Ein-Mann-Firma zum 80 Mitarbeiter-Betrieb – so baute Guido Sieger die Sigmatic auf und aus
surseerwoche.ch

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Location

Infanteriestrasse 2
6210 Sursee
Opening hours
Mon
07:30 - 11:45, 13:15 - 17:00
Tue
07:30 - 11:45, 13:15 - 17:00
Wed
07:30 - 11:45, 13:15 - 17:00
Thu
07:30 - 11:45, 13:15 - 17:00
Fri
07:30 - 11:45, 13:15 - 16:30
Sat
Closed
Sun
Closed

At a glance

Legal form
Sole proprietorship
UID
CHE-114.990.758
Founded
1985 · 41 years
Last commercial register change
September 2, 2011
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.
67.0
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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