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October 2026
Top 5 passive fire protection companies in the United States
Of the 47 passive fire protection companies in the United States listed in the OpenFire directory in October 2026, these profiles were viewed most by people and AI assistants.
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#1
Academy Fire
Comprehensive fire and life safety services
Contractor 100+ people 2 officesAlarm monitoring Emergency lighting Fire alarm systems +4 moreRockville Centre, New York · HQ View company -
#2
Lynx Systems LLC
fire protection services, intrusion detection, video surveillance, access control, integrated security
Contractor 6–20 people Est. 2001 1 officeAlarm monitoring Emergency lighting Fire & smoke dampers +6 moreSouthington, CT View company -
Joint #3
JD Firestop Pros
Woman-owned UL qualified firestop and fireproofing contractor.
Contractor 6–20 people Est. 2013 1 officeFirestopping Structural fire protectionTracy, California View company -
Joint #3
National Firestopping Solutions
FM 4991 Approved and UL Qualified firestop specialist.
Contractor 21–100 people 3 officesFire door inspection & survey Firestopping PFP survey & inspectionDurham, North Carolina · HQ View company -
Joint #5
Brand Services
FM 4991 certified firestop and life-safety compliance contractor.
Contractor 21–100 people Est. 1994 3 officesFire & smoke dampers Fire door inspection & survey Firestopping +1 moreConnecticut · HQ View company -
Joint #5
California Firestop
Dually UL Qualified and Factory Mutual certified firestop contractor.
Contractor 21–100 people Est. 2013 3 officesCompartment walls & cavity barriers FirestoppingOceanside, California · HQ View company -
Joint #5
Carboline
UL- and FM-certified cementitious and intumescent fireproofing.
Manufacturer 100+ people Est. 1947 1 officePFP product manufacture Structural fire protectionSt. Louis, Missouri View company -
Joint #5
Greenheck Fan Corporation
Smoke control fans, life safety dampers and garage ventilation.
Manufacturer 100+ people Est. 1947 5 officesCar park ventilation Fire & smoke dampers Mechanical smoke extractSchofield, Wisconsin · HQ View company -
Joint #5
Life Safety Solutions
Your Sole-source Firestop Solution
Contractor 21–100 people 1 officeFirestoppingVancouver, Washington View company
Browse all fire safety companies in the United States →
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.