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September 2026
Top 5 fire alarm and detection companies
Of the 1176 fire alarm and detection companies listed in the OpenFire directory in September 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 firm -
#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 firm -
#3
Zenith Elektro AS
FG-certified Norwegian electrical contractor.
Installer 6–20 people 1 officeFire alarm systemsLangevåg, Vestland View firm -
#4
Extincêndios - Equipamentos de Protecção e Segurança, S.A
ANEPC-registered for 7 SCIE categories, Lisboa.
Installer 21–100 people 1 officeCompartment walls & cavity barriers Emergency lighting Fire alarm systems +7 moreLisboa, Lisboa View firm -
Joint #5
Sperosens
Mining fire protection and telemetry manufacturer, about 300 staff.
Manufacturer 100+ people Est. 1988 4 officesAlarm monitoring Detection equipment manufacture Fire alarm systems +3 moreCenturion, Gauteng · HQ View firm -
Joint #5
Veolia Portugal, S.A
ANEPC-registered for 6 SCIE categories, Lisboa.
Installer 21–100 people 1 officeCompartment walls & cavity barriers Emergency lighting Fire doorset manufacture +6 moreLisboa, Lisboa View firm
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Firms 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. Firms with equal views share a rank.
A firm 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 firms are listed and viewed for it to be meaningful.
A ranking reflects interest in a firm's listing. It is not an endorsement, and it is not a check of a firm's competence, certification or accreditation.