Nuki controls compatible-door access; ADT covers alarm zones, cameras, and response. Compare fit, accounts, handoffs, outages, privacy, cost, and recovery.

Nuki controls access at a compatible door; SimpliSafe covers alarm zones, cameras, and response. Compare fit, handoffs, outages, privacy, cost, and recovery.

Nuki controls access at a compatible door; Cove covers alarm zones, cameras, and professional monitoring. Compare fit, response, outages, privacy, cost, and recovery.

Compare Nuki retrofit smart-lock access with Ring DIY alarm and camera coverage across cylinder fit, credentials, zones, subscriptions, outages, 36-month cost, and a 90-minute test.

Compare Nuki retrofit smart locks with Ultraloq replacement deadbolts across door fit, fingerprint and keypad access, smart-home paths, outages, recovery, and full installed cost.