Alarm Lock

Alarm Lock is a professional access-control lock brand best known for its Trilogy® line of keyless electronic door locks and related access/egress hardware for commercial buildings. It’s positioned squarely at the “security pro” end of the market: rugged, serviceable, and built for real sites like education, healthcare, retail, mixed-use and commercial facilities where you need controlled access without turning every door into a wiring project. 

The brand sits under Alarm Lock Systems, which is a division of NAPCO Security Technologies. In other words: Alarm Lock is one of NAPCO’s established security product families alongside other access and alarm lines.

They also lean into a trade-channel model: Alarm Lock products are marketed as being built for security professionals and distributed through independent security/lock distributors, rather than being a mass retail “grab one off the shelf next to the scented candles” brand.