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10 Best Smart Locks Under 100 of 2026

Buying Guide

Door and cylinder compatibility

Measure your existing lock and check whether your door uses a euro profile cylinder, rim lock or multipoint system. Many budget smart locks are designed for standard euro cylinders and may not fit multipoint locks without an adapter or professional modification.

Connectivity and smart features

Decide whether you need Wi‑Fi, Bluetooth or a hub-based system - Bluetooth models are usually cheapest and suit single‑household use, while Wi‑Fi (or hub) gives remote access. Consider which features matter most: app control, keypad, fingerprint, temporary codes or integration with smart home platforms.

Security and certifications

Look for recognised testing or certifications (for example Sold Secure or British Standards where applicable) and strong encryption claims from the manufacturer. Also check the physical robustness: anti‑drill, anti‑bump or anti‑snap features and whether a mechanical key override is provided.

Battery life and fail‑safe options

Budget smart locks usually run on AA batteries or a rechargeable cell - check advertised battery life and how the lock notifies you of low power. A mechanical key override or an external emergency power point is essential so you aren't locked out if the batteries die.

Installation, warranties and ongoing cost

Choose a lock you can fit yourself if you want to save on installation; many under‑£100 models are designed for DIY fitting. Check the warranty, app updates and whether extra accessories (bridge/hub, replacement batteries) will add to the total cost.

Frequently Asked Questions

What is the best smart lock under £100 in 2026?
There isn’t a single best model for everyone, but the best under‑£100 smart locks in 2026 tend to be Bluetooth smart cylinders or keypad locks that combine reliable physical security, a user‑friendly app and a mechanical key override. Prioritise a lock with good battery life, recognised security testing and positive reviews from UK retailers like Amazon UK, Argos or B&Q.
Is a smart lock worth buying in the UK?
Yes, if you value convenience (keyless entry, guest codes) and you choose a model compatible with your door type. For flats or doors with multipoint locking, check compatibility first; for homeowners and renters alike a well‑chosen smart lock can be a worthwhile upgrade.
Which smart lock offers the best value for money under £100?
The best value models are typically Bluetooth‑only smart cylinders or keypad units that include a mechanical override, solid build quality and an easy app. These give the core smart functionality without the additional cost of a Wi‑Fi bridge or hub.
Yale vs Ultraloq - which should I buy?
Yale is a long‑established brand with wide UK support and a broad product range, while Ultraloq often packs advanced features (like fingerprint or multi‑access methods) into budget models. Choose Yale for brand reliability and spares; consider Ultraloq if you want extra features for a similar price - but always check compatibility and reviews for the specific model.
Can I fit a smart lock myself or do I need a locksmith?
Many budget smart locks are designed for DIY installation and fit standard euro cylinders or nightlatch doors with only basic tools. However, if your door has a multipoint lock, unusual cylinder or you’re unsure, a locksmith is recommended to avoid invalidating warranties or compromising security.
Will fitting a smart lock affect my home insurance in the UK?
It can - insurers expect locks to meet certain standards. Check your policy and, where possible, choose a lock with recognised testing or inform your insurer about the upgrade to avoid issues with future claims.
Can smart locks be hacked?
Like any connected device, smart locks can be targeted, but reputable models use encryption and secure pairing to reduce risk. Follow best practice: keep the app updated, use strong account passwords, enable two‑factor authentication if available and choose well‑reviewed models from known sellers.
Do smart locks work with multi‑point locked doors?
Many budget smart cylinders are not compatible with multi‑point locks or may only operate the cylinder rather than the full multipoint mechanism. If your door has multipoint locking, look for a model explicitly listed as compatible or consult a locksmith about suitable retrofit options.
What is the best smart lock for rental properties in 2026 under £100?
For rental use, choose a Bluetooth or keypad smart cylinder that offers temporary guest codes, easy user management and a mechanical key override; these typically give the best balance of security and cost under £100. Prioritise models with straightforward admin via an app and strong battery life (6–12 months) so landlords can manage access without frequent maintenance.
Is a smart lock under £100 worth buying in 2026?
Yes if you want basic keyless convenience: under‑£100 smart locks usually provide Bluetooth connectivity, keypad or basic app control and a mechanical backup, making them good value for single‑household use. Expect to trade off advanced cloud features or remote Wi‑Fi access unless you buy a separate bridge or hub.
Yale budget smart cylinder vs generic Bluetooth smart cylinder - which should I buy?
A Yale budget smart cylinder typically offers broader UK support, clearer spare‑part availability and established brand reliability, while a generic Bluetooth cylinder may be cheaper and offer similar core features. If after‑sales support and recognised branding matter, pick Yale; if you prioritise lowest upfront cost and are comfortable checking reviews, a reputable generic model can be better value.
Which smart lock type is best value for money in the UK under £100?
Bluetooth‑only smart cylinders or stand‑alone keypad locks usually deliver the best value under £100 - they provide reliable keyless entry, low ongoing costs and simple DIY fitting. Look for models with mechanical key override, solid build quality and positive UK retailer reviews to ensure long‑term value.

Our Methodology

Product Selection: Products are sourced via Amazon's Product Advertising API based on relevance, availability, and customer ratings.

Review Analysis: We use AI to analyze customer review trends, identify common themes, and summarize the key strengths and weaknesses of each product.

Scoring Independence: Our rankings and fit scores are generated algorithmically and are not influenced by commission rates or advertising relationships.

Affiliate Disclosure: We earn commissions from qualifying Amazon purchases made through our links at no additional cost to you.

Last updated: June 5, 2026

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