How to use this directory

Treat each row as a starting point for research, not an endorsement or procurement specification. Product names, interfaces and certifications can change; verify the ordered version with the manufacturer or authorized partner.

Why categories matter

Passive smart cards harvest reader power and fit card infrastructure. Powered authenticators can add screens, buttons, batteries and radios but introduce charging and lifecycle considerations. Similar dimensions or sensors do not make the products equivalent.

Editorial inclusion rule

We include products with an identifiable manufacturer and usable primary documentation. We distinguish published vendor claims from independent evidence and avoid illustrative product images that could mislead readers.

Fields we will expand

Future updates will add confirmed dimensions, sensor family, template capacity, interfaces, certification identifiers, enrollment method, geographic availability and dated source checks when reliable public evidence exists.