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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,937 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesTechnical Consulting & EngineeringDerendingenSPI Planer und Ingenieure AG
SPI Planer und Ingenieure AG Logo
Verified· 4 sourcesTrust Score
Summary

About the company

The core activity of SPI Planer und Ingenieure AG is the provision of engineering services and consulting in the fields of civil engineering, spatial planning, and energy and communication projects. Specifically, this includes: Building construction: structural planning, renovations, foundation and special civil engineering; Civil engineering: wastewater disposal, sewer TV, road construction, hydraulic engineering, water supply; Spatial planning: local planning, traffic planning, traffic engineering; Energy/Communication: energy and communication supply, working plans. The company offers consulting and planning services for construction projects and supports private and public clients in the realization of their projects.

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Products & services

Industry:Technical Consulting & Engineering
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4.3/5

SPI Planer und Ingenieure AG

✓ Offered8
Structural design
Engineering structures and special structures; static concepts, structural design of load-bearing structures, residential buildings, conversions, service and commercial buildings, industrial facilities, bridges and stream culverts.
Civil engineering
General civil engineering for road construction, traffic engineering, wastewater disposal, water supply and waterway works; including sustainable infrastructure solutions and condition surveys.
Spatial development
Spatial and transport planning for attractive living, residential and working environments; including local planning, traffic planning and traffic engineering.
Wastewater management
Studies and concepts, master drainage planning, design and construction management of wastewater pipelines, special structures, stormwater retention basins, pumping stations, retention and infiltration facilities.
Water supply
Studies and concepts, master water-supply planning, ensuring drinking-water supply in severe shortage scenarios, design and construction management of intake, pumping, reservoir and water-pipeline systems.
Waterway engineering
Maintenance concepts and hazard maps, as well as design and construction management for revitalisation and re-naturalisation measures, river diversions, and works for riverbanks, flood protection and retention.
Transport planning
Access and land-development concepts, traffic reports, mobility concepts, parking concepts, traffic and slow-mobility planning, street-space design, intersection optimisation and safe routes to school.
Traffic engineering
Speed measurements and traffic-volume surveys, including evaluations, recommendations for measures, cost estimates and advice on the next steps.
Trust & reputation

ranQ Trust Score of SPI Planer und Ingenieure AG: 4.3 out of 5.0

Trust Score4.3/ 5.0

Very high

x

Data basis 100% · As of October 2026

SPI Planer und Ingenieure AG scores 77.4 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.85.624%
  • 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.79.710%
  • 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.50.08%
SPI Planer und Ingenieure AG scores 93.9 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.82.07%
SPI Planer und Ingenieure 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%
SPI Planer und Ingenieure AG scores 26.5 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 35.42.94%
  • Media authority: Quality and number of editorial mentions, weighted by the importance of the source, plus the recency of the latest high-quality mention.10.04%
Qualifications+0.00

SPI Planer und Ingenieure AG reaches a ranQ Trust Score of 4.3 out of 5.0 — rated «Very high». The rating draws, among other things, on 4.9 out of 5 stars from 22 customer reviews. As of October 2026.

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

Reviews

Aggregated rating

Aggregated rating
4.9
of 5

Aggregated from 22 reviews across all connected sources

Sources
GGoogle4.922
★TrustpilotSoon
PProvenExpertSoon

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

Press

Media

June 24, 2014Media
Vor 50 Jahren hat die Erfolgsgeschichte der Ingenieursfirma begonnen
solothurnerzeitung.ch

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Location

Luzernstrasse 34
4552 Derendingen

At a glance

Legal form
Corporation
UID
CHE-107.662.562
Founded
1994 · 32 years
Last commercial register change
July 1, 2025
Employees
21 to 50
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.85.03%
    • Full methodology

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