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October 2026
Top 5 fire alarm and detection companies
Of the 1181 fire alarm and detection companies listed in the OpenFire directory in October 2026, these profiles were viewed most by people and AI assistants.
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#1
A400 - Projetistas e Consultores (Fire & Safety Department)
Green By Default
Consultancy 100+ people Est. 1995 2 officesAlarm monitoring Car park ventilation CFD modelling +29 morePorto, Porto · HQ View company -
#2
Nacional Fire
Fire projects, AVCB licensing and installation across Brazil.
Supplier 1–5 people Est. 2024 1 officeDetection & suppression testing Alarm monitoring Building safety disputes +45 moreSão Paulo, São Paulo View company -
#3
Onyx-Fire Protection Services
National Canadian contractor, 1,200 staff across fifteen branches.
Contractor 100+ people Est. 1988 7 officesAlarm monitoring Emergency lighting Fire alarm systems +3 moreMississauga, Ontario · HQ View company -
Joint #4
Oliver Fire Protection & Security
Saving Lives and Protecting Property Since 1957
Contractor 100+ people Est. 1957 2 officesAlarm monitoring Fire alarm systems Foam suppression +4 moreKing of Prussia, Pennsylvania · HQ View company -
Joint #4
Westside Fire & Backflow
Full-service fire protection
Contractor 1–5 people 1 officeEmergency lighting Fire alarm systems Foam suppression +4 moreBeaverton, Oregon View company
Browse all fire alarm and detection companies →
Companies are ranked by how often their OpenFire directory profile was viewed during the calendar month, by people and by AI assistants. Search-engine crawlers, other automated traffic and link previews are not counted. Companies with equal views share a rank.
A company with offices in several countries, or working across several categories, is ranked in each of them on the same monthly total. A ranking is only published where enough companies are listed and viewed for it to be meaningful.
A ranking reflects interest in a company's listing. It is not an endorsement, and it is not a check of a company's competence, certification or accreditation.