Average score
Product 1: SwitchBot Lock Ultra
4.2
Product 2: eufy Video Smart Lock S330
4.1
Access logs
Product 1: SwitchBot Lock Ultra
4.3

Access logs are frequently mentioned, including local history tracking and identifying who unlocked when credentials are tied to users. Several sources indicate logs can be retained for months, which is useful for monitoring and troubleshooting.

Product 2: eufy Video Smart Lock S330
4.7

Access/activity logging is a practical strength in real use: reviewers mention seeing who unlocked/locked and, in some cases, which fingerprint/user performed the action.

Alarm/siren loudness (if included)
Product 1: SwitchBot Lock Ultra
4.2

Alerts are typically configurable beeps/chirps for states like door left open/unlocked and can often be muted or toned down. Reviewers generally find them useful for awareness, but they’re not framed as a full-volume siren replacement.

Product 2: eufy Video Smart Lock S330
No score yet
App
Product 1: SwitchBot Lock Ultra
4.4

The SwitchBot app is repeatedly praised for an intuitive setup flow, strong configurability (speed, alerts, night modes, scenes), and smoother calibration than earlier models. A recurring nuisance is that some settings are harder to adjust unless the phone is currently connected to the lock.

Product 2: eufy Video Smart Lock S330
4.4

The app is consistently described as clean and feature-rich, with detailed control over access, detection, notifications, and power modes. A recurring critique is that troubleshooting (especially calibration guidance) could be clearer, and some wanted phone-based tap/NFC unlock.

Auto-lock
Product 1: SwitchBot Lock Ultra
4.1

Auto-lock is flexible (timers, door-closed conditions) and often works well when the door sensor is accurate and the door’s mechanics are straightforward. On certain doors (lift-to-lock or sensor misreads), auto-lock can fail or require delays and user training to avoid jams or unwanted lockouts.

Product 2: eufy Video Smart Lock S330
4.2

Auto-lock is commonly praised for peace of mind and flexibility (including short delays and schedules). Some reviewers cautioned that auto-lock can be risky if your door isn’t reliably closed/aligned or if door state detection is imperfect.

Auto-relock after failed attempts
Product 1: SwitchBot Lock Ultra
4.6

Lockouts after repeated failed attempts are described as a practical safeguard on keypad-based entry, with escalating disable timers in at least one review. This helps slow brute-force attempts while keeping other entry methods available.

Product 2: eufy Video Smart Lock S330
4.3

Wrong-try protections are commonly described (lockdown/timeouts after multiple incorrect entries), helping reduce brute-force attempts and adding practical security beyond basic PIN entry.

Backset compatibility
Product 1: SwitchBot Lock Ultra
No score yet
Product 2: eufy Video Smart Lock S330
4.5

Backset support is described as adjustable to common sizes (2 3/8 in and 2 3/4 in), which helps it fit typical deadbolt door prep.

Battery
Product 1: SwitchBot Lock Ultra
4.6

Battery design is a highlight: reviewers frequently cite long life on the rechargeable pack plus multiple layers of backup power (backup battery/capacitor/emergency unlock) to reduce lockout risk. A common gripe is that charging typically requires removing the battery pack, though backup power helps bridge that downtime.

Product 2: eufy Video Smart Lock S330
4.4

Battery life is a highlight: the 10,000mAh rechargeable pack is repeatedly described as lasting months, with long-term users charging only a few times per year when tuned (for example, human-only motion). Charging can take hours and you may need to supply your own USB-C power gear.

Bluetooth
Product 1: SwitchBot Lock Ultra
4.0

Bluetooth-first operation is consistent across reviews: local control works, and keypad-to-lock Bluetooth can feel very fast thanks to an always-on link. However, phone-to-lock Bluetooth connection time can add noticeable delay in some situations.

Product 2: eufy Video Smart Lock S330
4.1

Bluetooth is commonly mentioned as part of the lock-to-bridge communication path. Reviewers generally describe it as functional, primarily as an invisible link in the overall system.

Build quality and durability
Product 1: SwitchBot Lock Ultra
4.5

Build quality is widely described as sturdy and premium-feeling, with multiple sources calling out a robust body and confident feel on the knob and mounting system. Overall, it’s positioned as a more refined, durable step up from prior SwitchBot retrofit locks.

Product 2: eufy Video Smart Lock S330
4.4

Build quality is widely described as heavy-duty and mostly metal, but it is also frequently called large/bulky. One expert review wanted a bit more robustness to make it an easy, universal recommendation.

Door-sense
Product 1: SwitchBot Lock Ultra
3.9

The door sensor/magnet enables door-ajar awareness and smarter auto-lock behavior, but it’s also one of the most common weak points. Multiple reviewers note misreads or finicky behavior on certain installations, which can undermine automation reliability.

Product 2: eufy Video Smart Lock S330
2.5

Door state awareness appears mixed: at least one reviewer warned the lock may not reliably know whether the door is open or closed, which matters if you rely heavily on auto-lock behaviors.

Door compatibility (deadbolt fit)
Product 1: SwitchBot Lock Ultra
4.3

Compatibility is a selling point, with multiple reviews emphasizing broad support for different lock types and door styles, including some tricky setups. Still, outliers exist where adapters don’t fit without modification, and some door mechanics (like lift-to-lock handles) require user habits or delays to work smoothly.

Product 2: eufy Video Smart Lock S330
3.4

Door fit is usually straightforward, but some doors may need extra attention: shallow strike-plate depth can trigger calibration failures, and tight tolerances mean misalignment can prevent reliable locking.

Existing hardware reuse
Product 1: SwitchBot Lock Ultra
4.9

A core strength is keeping the existing exterior cylinder and keys, which reviewers call ideal for renters or anyone preserving curb appeal. Because it’s interior-only, reliable outside entry typically improves most when paired with a keypad (or other SwitchBot accessories).

Product 2: eufy Video Smart Lock S330
4.2

At least one installation guide notes you may be able to reuse existing deadbolt hardware if it fits flush, reducing the need to replace every component.

Feature additions via updates
Product 1: SwitchBot Lock Ultra
4.2

Firmware and app updates are referenced as meaningful, with some reported fixes and ongoing feature improvements. Several reviewers still caution against buying purely on promised future integrations, even though SwitchBot appears active in updates.

Product 2: eufy Video Smart Lock S330
4.5

At least one long-term reviewer highlighted meaningful feature additions via updates, such as unlocking directly from a live-view screen on supported cameras, improving day-to-day usability.

Fingerprint
Product 1: SwitchBot Lock Ultra
4.3

Fingerprint unlocking is usually fast and convenient, especially when the keypad maintains an active connection to the lock. A few reports mention missed reads (or smaller fingers struggling) and occasional scanner flakiness, which makes a PIN/NFC fallback valuable.

Product 2: eufy Video Smart Lock S330
4.4

Fingerprint performance is polarizing: several owners describe it as among the fastest and most accurate they have used, while one expert reviewer struggled with repeated reads and wished for clearer activation feedback (lighting).

Finish durability
Product 1: SwitchBot Lock Ultra
3.3

Aesthetic add-ons (like stick-on veneers/wood-grain overlays) are polarizing: some appreciate the option, while others think they look cheap or don’t add much. The core enclosure is generally liked for its cleaner, slimmer design.

Product 2: eufy Video Smart Lock S330
No score yet
Geofencing
Product 1: SwitchBot Lock Ultra
3.5

Geofencing is commonly described as beta/inconsistent: some testers report sporadic triggers, missed arrivals, or reliability that depends heavily on location conditions. When it works, it’s convenient, but most sources recommend keeping a stronger backup entry method.

Product 2: eufy Video Smart Lock S330
No score yet
Guest Codes and Access
Product 1: SwitchBot Lock Ultra
4.4

Guest access is strong in most accounts, with permanent, temporary, and one-time codes commonly supported, plus emergency/duress-style options in some setups. Some reviewers want more granular scheduling rules (like day-of-week windows) for shared access.

Product 2: eufy Video Smart Lock S330
4.4

Guest access options are robust, including temporary or scheduled PIN codes and app-based access. Scramble passcode and other convenience/security options are frequently cited.

Hub requirement
Product 1: SwitchBot Lock Ultra
3.7

The hub is optional for basic local use but commonly required for the “full” experience (remote access, Matter, voice assistants, and broader smart-home integration). Multiple reviews frame this as the primary tradeoff of the product’s Bluetooth-first design.

Product 2: eufy Video Smart Lock S330
4.0

The required plug-in chime/bridge is a core part of the experience: it enables remote connectivity and local storage, and many liked having a loud indoor chime. Downsides include extra setup steps and needing to provide your own microSD card.

Installation and Setup
Product 1: SwitchBot Lock Ultra
4.4

Most reviewers describe installation and calibration as quick and greatly improved over older SwitchBot locks, often taking just minutes with clear in-app guidance. Edge cases exist: some doors needed drilling, adapter kits, or fiddly latch/bracket alignment.

Product 2: eufy Video Smart Lock S330
4.2

Most reviewers found installation similar to other full deadbolt replacements and generally manageable, but a few called out real-world friction: needing a second set of hands, long firmware updates, and careful mechanical alignment to avoid errors or motor strain.

Jam detection
Product 1: SwitchBot Lock Ultra
3.7

When resistance is encountered, the lock may report being stuck or require recalibration, and emergency/boost unlock features can help recover. Still, door mechanics (lift handles, sticky cylinders, low-power quiet modes) can create jam-like scenarios that users must tune around.

Product 2: eufy Video Smart Lock S330
2.8

Calibration and error states can present as jam-related warnings in the app for some installs, even when the deadbolt feels physically secure, creating nuisance alerts rather than true mechanical jams.

Key override reliability
Product 1: SwitchBot Lock Ultra
3.7

Key override is a reliable fallback because the exterior hardware stays unchanged, and several reviewers like that a locksmith can still service the cylinder without destroying the smart module. However, certain installs that require an interior key left inserted can limit outside key insertion on some doors.

Product 2: eufy Video Smart Lock S330
No score yet
Keypad
Product 1: SwitchBot Lock Ultra
4.4

Keypads are repeatedly positioned as essential for the best everyday experience, adding PIN/fingerprint/NFC and, with Vision, face unlock plus extra functions like doorbell/scene triggers. Downsides include added cost, larger outdoor footprint, and occasional biometric finickiness depending on user and conditions.

Product 2: eufy Video Smart Lock S330
4.2

The keypad is generally considered easy and reliable for daily use, with extra security options like scramble passcodes. One reviewer noted occasional wake-up/tap sensitivity issues before the keypad became responsive.

Lock/unlock speed
Product 1: SwitchBot Lock Ultra
4.4

Speed is often called a major upgrade versus earlier SwitchBot models, especially when unlocking via keypad (typically very fast). Phone-based Bluetooth control ranges from quick to sluggish depending on connection state, and some third-party/Matter paths are slower than direct control.

Product 2: eufy Video Smart Lock S330
4.7

When the biometric reader works well, unlocks are described as extremely fast. However, experiences vary: some testers reported repeated attempts needed on the fingerprint sensor, while others called operation instant and consistent.

Locking motor
Product 1: SwitchBot Lock Ultra
4.5

Motor strength is generally praised for handling stiff deadbolts and certain complex door systems, with a smoother/quieter action than prior models. Some reviewers warn that quieter/slow modes can reduce available torque on sticky locks, potentially affecting reliability in edge cases.

Product 2: eufy Video Smart Lock S330
4.2

The motor is sensitive to resistance: if the deadbolt/strike alignment is off, reviewers warned the motor may struggle or fail to complete a lock cycle. With good alignment, long-term users reported stable performance.

Locking reliability
Product 1: SwitchBot Lock Ultra
4.4

Overall locking reliability is rated highly, with improved mounting and auto-calibration reducing out-of-sync issues versus older versions. Reliability is best on standard, well-aligned doors; unusual mechanics and door-sense inaccuracies can still reduce automation consistency.

Product 2: eufy Video Smart Lock S330
4.2

Locking reliability is strong for many owners (including long-term use), but it is not universally flawless. Reported weak spots include finicky alignment/calibration states and occasional inconsistencies with certain external controls (like one-touch locking).

Notifications
Product 1: SwitchBot Lock Ultra
4.4

Notifications for lock activity, door-ajar state, and battery status are generally reported as accurate when connectivity is set up properly. Some users note that ecosystem/bridge paths can introduce delays compared with direct app or keypad operation.

Product 2: eufy Video Smart Lock S330
4.1

Notifications are configurable and usually fast, but not perfect: a few reviewers saw delayed starts to recorded events, occasional missed motion/loitering triggers, or tradeoffs between faster alerts vs alerts that include thumbnails.

Remote access
Product 1: SwitchBot Lock Ultra
3.9

Remote access works when bridged via a hub or compatible SwitchBot device, and several reviewers find it genuinely useful for visitors and monitoring. That said, a few sources report slower response or unreliable behavior when controlling through certain third-party platforms.

Product 2: eufy Video Smart Lock S330
4.5

Remote access is repeatedly described as convenient and reliable, including locking/unlocking from anywhere and checking lock status. Several reviewers highlighted using it for guests, contractors, or deliveries.

Security features (encryption)
Product 1: SwitchBot Lock Ultra
4.4

Digital security notes include AES-128 encrypted communication and local storage of biometric data (faces/fingerprints) rather than cloud dependence in several reviews. On the physical side, overall security still depends on the strength of your existing cylinder and door hardware.

Product 2: eufy Video Smart Lock S330
4.0

Security and privacy discussion centers on local storage and app behavior; one reviewer noted an on-screen encryption message before video streams to the bridge. Overall, the product is framed as privacy-leaning due to non-subscription local storage, with some mention of broader brand scrutiny.

Smart-home integration (Alexa, Google, Siri, HomeKit, Matter, Thread)
Product 1: SwitchBot Lock Ultra
4.0

Matter/smart-home integration typically requires a hub or SwitchBot bridge device and often exposes a basic lock/unlock experience in platforms like Apple Home or Home Assistant. Results range from smooth to slow/unreliable depending on ecosystem and setup, so local keypad entry is often the fastest path.

Product 2: eufy Video Smart Lock S330
3.4

Smart-home integration is limited compared to ecosystems that prioritize Apple: reviewers consistently note Alexa and Google support, but no Apple HomeKit, Matter, or IFTTT.

Tamper detection sensitivity
Product 1: SwitchBot Lock Ultra
4.2

Tamper/anti-theft features are commonly associated with the keypad ecosystem and can be enabled/managed in the app. Reviews mention the availability of tamper alerts, but most do not deeply stress-test sensitivity against real-world attacks.

Product 2: eufy Video Smart Lock S330
No score yet
Touchscreen
Product 1: SwitchBot Lock Ultra
No score yet
Product 2: eufy Video Smart Lock S330
4.0

Touch controls are usually described as responsive and backlit, but at least one expert review reported needing multiple taps to wake the dark touchscreen at times.

User access management
Product 1: SwitchBot Lock Ultra
4.3

User access management is generally well-regarded, allowing multiple user profiles and the ability to add/revoke faces, fingerprints, NFC cards, and codes. Capability and convenience improve significantly with keypad pairing and a properly configured hub ecosystem.

Product 2: eufy Video Smart Lock S330
4.3

User management is broadly praised, including multiple users, fingerprints, and configurable access windows. Reviewers emphasized that it’s easy to add or adjust access in the app.

Value and Price
Product 1: SwitchBot Lock Ultra
4.1

Value is often viewed as strong for a modern retrofit lock, particularly for users already in the SwitchBot ecosystem. Total cost can rise quickly if you add a hub and the Vision keypad, at which point some reviewers compare it to full smart-lock alternatives.

Product 2: eufy Video Smart Lock S330
4.0

Value is framed as strongest when the price is closer to the low-to-mid $300s, since it combines multiple devices and includes the chime/bridge. At full price near $400, reviewers still call it feature-rich, but expectations rise for perfect reliability and broad ecosystem support.

Voice control
Product 1: SwitchBot Lock Ultra
4.1

Voice control is available via hub integrations and generally works, often with added PIN/voice-code protections for unlocking. It’s useful for hands-free control but usually not as quick or consistent as keypad-based entry at the door.

Product 2: eufy Video Smart Lock S330
4.1

Voice control works through Alexa and Google Assistant in supported setups, including lock/unlock commands and, in at least one review, routines tied to doorbell events.

Weather resistance
Product 1: SwitchBot Lock Ultra
4.2

Because the lock mounts indoors, weather concerns mostly apply to outdoor accessories like keypads, which are often rated for rain and temperature extremes. Reports indicate good real-world performance in wind/rain and cold, but face recognition can degrade in harsh lighting or extreme cold.

Product 2: eufy Video Smart Lock S330
4.5

Weather resistance is presented as strong on paper (including an IP65 rating in one review), and no reviewer reported weather-related failures in the provided transcripts.

Wi-Fi
Product 1: SwitchBot Lock Ultra
3.7

Wi-Fi connectivity isn’t native to the lock and is usually provided via a SwitchBot hub/bridge. Reviewers generally like having the option, but experience can depend on hub placement and network quality, and some ecosystems can feel slower than local keypad use.

Product 2: eufy Video Smart Lock S330
3.9

Wi-Fi is tied to the required bridge and is noted as 2.4GHz in at least one expert review. In general, connectivity is described as stable, with one review calling out distance guidance between lock, chime/bridge, and router.