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© 2026 cohaga AG · All Rights Reserved · St. Gallen, Switzerland · Imprint745,629 companies indexed · Last updated: today
DirectoryBusiness & Technical ServicesSecurity ServicesZurichMaster-Key AG
Master-Key AG Logo
Verified· 3 sourcesTrust Score
Summary

About the company

Master-Key AG is a locksmith service providing 24-hour emergency response, door openings and lock repairs. The company plans, supplies and installs mechanical and electronic locking systems, handles key and cylinder orders, and offers alarm, fire-detection, video surveillance, safe services, access control, security consultation and post-burglary repairs.

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Offering

Products & services

Industry:Security Services
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4.5/5

Master-Key AG

✓ Offered
8
24h Locksmith Service Zurich
Emergency door opening, lost keys, defective locks and broken keys; opening of home, office, room, garage and safe doors, including on weekends and public holidays.
Key and cylinder ordering
Online ordering of KABA and KESO keys and cylinders with a security card or security certificate; application forms for new security cards for private individuals, companies and administrations.
Door and lock repairs
Repair of worn or defective locks, replacement when needed, as well as immediate measures and repairs after break-in damage to doors and fittings.
Locking system planning
Planning, ordering, delivery and installation of mechanical and electronic locking systems, including advice on systems from KABA, DOM, KESO and other manufacturers.
Mechanical burglary protection
Multi-point locking, window fastenings, safes, security fittings, security locks, as well as immediate measures and repairs after burglaries.
Electronic burglary protection
Alarm systems, fire alarm systems, video surveillance systems and fogging systems; security concepts and consultation as needed.
Access control
Systems for controlled opening and closing of access points, integrated into electronic locking systems and security concepts.
Security consulting
Advice on mechanical and electronic locking systems, window and door security, and other preventive security measures.
Trust & reputation

ranQ Trust Score of Master-Key AG: 4.5 out of 5.0

Trust Score4.5/ 5.0

Excellent

x

Data basis 96% · As of October 2026

Master-Key AG scores 93.9 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.89.324%
  • 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.100.010%
  • 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.100.08%
Master-Key AG scores 76.6 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.79.212%
  • 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%
Master-Key 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%
Master-Key AG scores 71.4 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 35.71.44%
  • Media authority: No data point — the criterion is taken out of the weighting and does not lower the score.—4%
Qualifications+0.00

Master-Key AG reaches a ranQ Trust Score of 4.5 out of 5.0 — rated «Excellent». The rating draws, among other things, on 4.8 out of 5 stars from 355 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
4.8
of 5

Aggregated from 355 reviews across all connected sources

Sources
GGoogle4.8355
★TrustpilotSoon
PProvenExpertSoon

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

Knowledge

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Location

Berninaplatz 1
8057 Zurich
Opening hours
Mon
24h
Tue
24h
Wed
24h
Thu
24h
Fri
24h
Sat
24h
Sun
24h

At a glance

Legal form
Corporation
UID
CHE-355.318.938
Founded
2018 · 8 years
Last commercial register change
October 31, 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

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