ranQ
ranQ
ranQ
DirectoryIndustriesPlacesKnowledgeComparisonsSoon
Sign inCheck visibility
ranQHSG Startup LabelRecognised by the
HSG Startup Label

The leading AI company directory, built to boost AI visibility.

DEENFRIT
Product
  • Pricing
  • Directory
  • Industries
  • Trust Score
Company
  • About
  • Contact
  • Legal
© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryFinance & InsuranceHolding CompaniesBaselErnst Keller & Co. AG
Ernst Keller & Co. AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Ernst Keller & Co. AG manufactures technical glassware for the fine chemical, chemical and pharmaceutical industries, supplying custom OEM glass articles, glass components and complete glass systems such as reactors, evaporators and extraction columns. The company also provides services including glass coatings, silvering, repairs and borosilicate (3.3) glass processing.

AI-generated
Offering

Products & services

Industry:Holding Companies
✓ Offered4
LeadhubOutbound Leads by COHAGA

Looking for direct email addresses and phone numbers?

Leadhub delivers verified contact details and decision-makers from over 750,000 Swiss companies — management, procurement, marketing, HR.

Discover Leadhub
4.1/5

Ernst Keller & Co. AG

OEM glass products
Customised manufacture of prototypes and glass products in small to medium batch sizes; reliable reproducibility from borosilicate glass.
Component
Custom and standard glass components for scientific applications; in-house production with short lead times and coordinated manufacturing.
Systems
Systems for laboratory, development and Kilolab scale; custom-designed and combined for processes using glass and other materials.
Technical glass repair
Repair of technical glass products and glass apparatus; precise glassblowing, custom-made parts and restoration of laboratory glassware.
Trust & reputation

ranQ Trust Score of Ernst Keller & Co. AG: 4.1 out of 5.0

Trust Score4.1/ 5.0

High

x

Data basis 96% · As of October 2026

Ernst Keller & Co. AG scores 61.2 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.60.724%
  • 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.40.910%
  • 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.88.08%
Ernst Keller & Co. 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%
Ernst Keller & Co. 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%
Ernst Keller & Co. AG scores 57.1 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 35.57.14%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Ernst Keller & Co. AG reaches a ranQ Trust Score of 4.1 out of 5.0 — rated «High». The rating draws, among other things, on 4.0 out of 5 stars from 4 customer reviews. The data basis is 96%, 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.

Reviews

Aggregated rating

Aggregated rating
4
of 5

Aggregated from 4 reviews across all connected sources

Sources
GGoogle44
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

No knowledge articles yet

Once Ernst Keller & Co. AG has claimed this profile, we'll publish editorial articles and case studies here together.

Get started
Comparisons

Ernst Keller & Co. AG in comparison

Soon

Industry comparisons are coming soon

We're preparing industry comparisons that rank Ernst Keller & Co. AG by reviews, experience and specialisations.

Is this your company?

Claim the company profile of Ernst Keller & Co. AG to make its contact details visible. With a plan we additionally create and publish industry comparisons, articles and much more.

Secure profile

Location

Im Wasenboden 8
4002 Basel
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 - 16:00
Sat
Closed
Sun
Closed

At a glance

Legal form
Corporation
UID
CHE-105.932.590
Founded
1958 · 68 years
Last commercial register change
July 25, 2025
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.
100.0
6%
  • Branch offices: Branch offices linked in the commercial register. Having none is normal and costs no points.70.03%
    • Full methodology

    Similar companies

    MH
    Microdis Holding AG
    Basel
    IG
    INTERPANE GLASS HOLDING AG
    Basel
    FS
    Fruselva Suisse AG
    Basel
    ZA
    Zeller.media AG
    Basel
    JH
    Jungbunzlauer Holding AG
    Basel
    AA
    Adesse AG
    Riehen
    VH
    Viessmann Holding GmbH
    Basel
    TH
    tonton holding gmbh
    Basel