Best Biometric Smart Lock Under 100
Browse all smart locks guidesBiometric smart locks combine the convenience of keyless entry with the security of fingerprint authentication, and many great options are available for under $100. This guide helps you understand why these locks matter and what to look for before you buy.
Quick Comparison
| Product | Price | Rating | |
|---|---|---|---|
 Smart Lock - Fingerprint Door Lock with Handle, Keyless Entry Door Kno... | $79.99 | ★★★★★5 | View |
 Fingerprint Door Lock, Keyless Entry Door Lock, Electronic Keypad Dead... | $99.99 | ★★★★★4.7 | View |
 Lockzo Smart Lock with Palm Vein, Keyless Entry Door Lock for Front Do... | $66.49 | ★★★★★4.6 | View |
 SMONET Smart Lock, Fingerprint Keyless Entry Door Lock Digital Electro... | $82.99 | ★★★★★4.6 | View |
 Foxgard Fingerprint Door Lock – 5-in-1 Biometric Smart Lock with Keypa... | $93.49 | ★★★★4.3 | View |
Smart Lock - Fingerprint Door Lock with Handle, Keyless Entry Door Knob with APP/Fingerprint/IC Card/Digital Code/Key, Electronic Keypad Deadbolt Lock for Home Hotel Bedroom Security, Auto Locks
Fingerprint Door Lock, Keyless Entry Door Lock, Electronic Keypad Deadbolt, Biometric Smart Locks for Front Door, Auto Lock, Anti-Peeking Password, Easy Install, (Bronze)
Lockzo Smart Lock with Palm Vein, Keyless Entry Door Lock for Front Door, WiFi Electronic Door Lock with Keypad Deadbolt, Auto Lock, Voice Control, Compatible with Alexa & Google Assistant
SMONET Smart Lock, Fingerprint Keyless Entry Door Lock Digital Electronic Bluetooth Auto Locks with Touchscreen Keypad, Biometrics Smart Deadbolt Lock, App Control for House and Apartment
Foxgard Fingerprint Door Lock – 5-in-1 Biometric Smart Lock with Keypad, App Control, Key, Auto-Lock, Electronic Anti-Lock – Keyless Entry for Bedroom, Office, Indoor Use – Gold
Why this product type matters
Traditional mechanical locks can be picked, lost, or duplicated. A biometric smart lock uses a unique fingerprint or other biometric data to grant access, making unauthorized entry far more difficult. In addition, most models offer multiple entry methods—such as a keypad, RFID card, or smartphone app—so you never get locked out. For renters, hotel guests, or anyone who wants a quick, key‑free way to secure a door, a biometric lock provides both peace of mind and modern convenience.
How to choose
When picking a biometric smart lock under $100, focus on:
- Fingerprint reliability – Look for a lock with a high‑resolution sensor and a quick recognition time (under 1 second). A lock with at least 5‑10 stored fingerprints is ideal for families.
- Backup access methods – Ensure the lock also supports a keypad, RFID card, or mechanical key so you have a fallback.
- Installation type – Decide whether you need a deadbolt replacement, a surface‑mount lock, or a built‑in knob; most budget models are surface‑mount and easy DIY.
- Power source & battery life – Most units run on AA or CR123 batteries; pick a lock with low‑power consumption and a battery‑low alert.
- Smart features – While optional, Wi‑Fi, Bluetooth, and voice‑assistant integration add convenience for remote locking/unlocking and activity logs.
- Build quality & rating – Choose a lock with at least a 4‑star rating and positive reviews that mention durability and accurate fingerprint reads.
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Frequently Asked Questions
Can I still use a traditional key with a biometric smart lock?
Yes. Most biometric locks include a mechanical key slot as a backup in case the battery dies or the fingerprint sensor malfunctions.
How many fingerprints can a $100 lock store?
Budget models typically store between 5 and 20 fingerprints. Check the specifications if you need more.
Will a fingerprint lock work in extreme temperatures?
Quality sensors operate in a wide temperature range, but very cold or hot environments can affect read speed. Look for a lock that advertises a -10°C to 50°C operating range for best reliability.
Do I need a professional to install a biometric lock?
Most under‑$100 models are designed for DIY installation with a simple screwdriver and clear instructions. If you have a complex door or want to integrate with a home automation system, a professional may be helpful.
What happens if the battery runs out?
The lock will usually alert you via an LED or app notification. You can still gain entry using the mechanical key or an RFID card, and battery replacement is typically a quick DIY task.