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The comparison cards start below. Open the editor only when you need to swap the shortlist.

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Loona Reachy Mini KATA Friends Ballie
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412 robots 9 categories 173 priced

Comparing 4 robots

Green cells flag numeric leaders, while AI, sensors, and capability rows keep the real buying tradeoffs visible.

LoonaReachy MiniKATA FriendsBallie
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Sources and record checks

Record checks are not independent testing or confirmation of every claim. Official sites provide manufacturer context; source context explains the record.

Loona

Record last checked: 2026-06-09

Official site Source context

Reachy Mini

Record last checked: 2026-05-25

Official site Source context

KATA Friends

Record last checked: 2026-05-14

Official site Source context

Ballie

Record last checked: 2026-10-11

Official site Source context
Each row compares one spec across your shortlist. Green marks the best value.
Loona Loona Reachy Mini Reachy Mini KATA Friends KATA Friends Ballie Ballie

Price

Loona
$442 USD
Price details

Official KEYi Loona Petbot Premium bundle sale price is $442 (Loona Go + Charging Dock + Game Prop Kit); compare-at price $529; structured data says InStock. Loona Go standalone may be listed separately.

Reachy Mini
$299 USD
Price details

$299 Reachy Mini Lite; $449 Reachy Mini Wireless; current official lead time 90 days after purchase. EU/UK and US/Canada ship duty-paid; other destinations may incur local import duties/taxes.

KATA Friends
$699 USD
Price details

Official US SwitchBot product JSON lists Noa and Niko variants as available at $699.00; the product-page selector and launch coverage show $699.99. Companion Care is separate after the free/complimentary period, with Essential at $14.99/month, Premium at $399.99/year, or a $999.99 one-time plan option.

Ballie
Price not recorded
Price details

Unreleased; consumer launch reportedly shelved (Bloomberg, January 7, 2026). No verified retail price or revised consumer launch date in the sources reviewed.

Height

Loona
17.3cm (6.8 in)
Reachy Mini
28 cm (11 in)
KATA Friends
Not officially disclosed
Ballie
Not officially disclosed

Weight

Loona
1.1kg (2.42 lbs)
Reachy Mini
1.350 kg (Lite) / 1.475 kg (Wireless)
KATA Friends
Not officially disclosed
Ballie
Not officially disclosed

Battery Life

Loona
2 hours continuous playtime; 1350 mAh, 11.1 V lithium-ion rechargeable battery
Reachy Mini
Not officially disclosed
KATA Friends
Not officially disclosed
Ballie
Not officially disclosed

Max Speed

Loona
N/A
Reachy Mini
Not officially disclosed
KATA Friends
Not officially disclosed
Ballie
Not officially disclosed

AI

Loona
GPT-powered conversations; current official hardware section lists a 5 TOPS processor, Cortex-M4 100 MHz co-processor, dual-core DSP 360 MHz HIFI audio engine, 2 GB LPDDR4 RAM, and 8 GB eMMC 5.0 storage
Reachy Mini
Open-source Python SDK with Hugging Face model/app integrations for speech, vision, and conversational behaviors
KATA Friends
On-device LLM with local visual processing for speech, gesture comprehension, face recognition, emotion cues, diary memories, and real-time companion behavior
Ballie
Google Gemini + proprietary Samsung language models

Sensors

Loona
3D Time-of-Flight (ToF) Sensor, 720p RGB Camera, Touch Sensor, 3-Axis Accelerometer, 3-Axis Gyroscope, 4-Microphone Array
Reachy Mini
120° 12 MP autofocus wide-angle camera, 4 PDM MEMS digital microphones, 5 W speaker, Accelerometer (wireless Reachy Mini)
KATA Friends
Cameras, Microphones, Touch sensors in ears, hands, tummy, and back, Obstacle-avoidance sensors, Laser distance/radar sensor (reported by CNET), Docking sensor (reported by CNET)
Ballie
Camera, Spatial Sensors, Environmental Sensors

Connectivity

Loona
Wi-Fi (Dual-band 2.4G/5.8G, 802.11a/b/g/n), USB Type-C (charging)
Reachy Mini
USB (Reachy Mini Lite via host computer), Wi-Fi (wireless Reachy Mini)
KATA Friends
SwitchBot companion app, On-device/offline AI interaction for core responses
Ballie
Wi-Fi, SmartThings

Status

Loona
Available
Reachy Mini
Available
KATA Friends
Available
Ballie
Prototype

Category

Loona
Companions
Reachy Mini
Companions
KATA Friends
Companions
Ballie
Companions
More specifications (4)

Includes rows even when values are not recorded.

Charging Time

Loona
Not officially disclosed
Reachy Mini
Not officially disclosed
KATA Friends
Not officially disclosed; CNET reports an 8-hour sleep/charge scheduleNot safely comparable as a typed unit
Ballie
Not officially disclosed

Degrees of Freedom

Loona
N/A
Reachy Mini
N/A
KATA Friends
N/A
Ballie
N/A

Voice Assistants

Loona
None
Reachy Mini
None
KATA Friends
None
Ballie
Bixby

Manufacturer

Loona
KEYi Tech
Reachy Mini
Pollen Robotics
KATA Friends
SwitchBot
Ballie
Samsung

Capabilities

Loona

AI-Generated VisualsAuto-Docking & ChargingAutonomous NavigationChatGPT ConversationsEmotion Expression (LCD face)Face RecognitionGoogle Blockly ProgrammingInteractive Games (AR, bullfighting, follow-the-leader)OTA UpdatesRemote Monitoring (camera)Touch InteractionVoice Commands

Reachy Mini

6-DoF head movementAnimated antennas for expressive interactionAudio-visual interaction (camera, microphones, speaker)DIY kit assembly (2–3 hours)Full body rotationHugging Face app ecosystem integrationPython-programmable behaviorsSimulation-first development workflow

KATA Friends

AI pet companionshipAutonomous indoor movementCompanion Care service plansDancing and expressive LCD-eye reactionsFace recognition for household membersGesture recognitionInterchangeable outfits and accessoriesObstacle avoidanceOn-device chat and diary generationPersonalized memory and behavior developmentPhoto capture and local app album storageSelf-dockingTouch-responsive behaviorVoice emotion recognitionVoice-command interaction

Ballie

Announced/demo: Adaptive Behavior (Learns User Patterns)Announced/demo: Autonomous Home NavigationAnnounced/demo: Built-in Projector (Wall & Floor)Announced/demo: Music PlaybackAnnounced/demo: Personalized Scheduling & RemindersAnnounced/demo: Pet & Family Monitoring (Video Updates)Announced/demo: Phone Call HandlingAnnounced/demo: Smart Home Control via SmartThingsAnnounced/demo: Voice & Conversational InteractionAnnounced/demo: Workout Video Projection

How to Compare Robots

Use this flow to get to a clean shortlist fast. The route works best as a dense research workbench, not a marketing page.

1

Choose comparable robots

Start with robots that solve the same job. Use category anchors like Humanoid, Cleaning, Companions, Research before you worry about micro-spec wins.

2

Read the big deltas first

Check price, status, battery, sensors, and capabilities before getting lost in minor spec rows.

3

Switch to differences only

Once you have a shortlist, hide shared rows. That turns the table from a spec dump into a real decision tool.

Cross-category comparisons still have value

A dedicated cleaner versus a home assistant with cleaning features can reveal whether you really need a specialist or just broader household coverage. Compare around the same outcome, not the same marketing language. And when blank-page friction is the problem, use one of the prebuilt quick-start pairings in the workbench above — open one, swap robots, and keep moving.

Making Your Decision

Turn comparison rows into an actual recommendation — not just more reading.

1

Weighted priorities

Not all spec deltas matter equally. Rank your buying criteria before crowning a winner.

  • List must-haves — smart-home platform, clearance, shipping status, or anything that eliminates a robot instantly.
  • Pick your top 3 differentiators — navigation, noise, battery, support, or whatever changes daily use.
  • Score only the finalists against those. The robot that wins your real priorities beats the one with the most green cells.
2

Total cost of ownership

The sticker price is only one row. Subscriptions, consumables, and service access often decide the real winner.

Subscriptions

Cloud AI and premium app tiers can make a cheaper robot more expensive over three years.

Consumables

Brushes, pads, filters, and bags flip the value story on high-frequency robots.

Energy & battery

Large batteries and frequent charging reveal everyday operating demands.

Repair & warranty

Local servicing and spare-parts access are the quietest but most important long-term costs.

3

Environment check

Specs describe ideal conditions. Your rooms, pets, and Wi-Fi determine what actually performs.

  • Floor types — carpet, hardwood, tile, and transition handling.
  • Space layout — open plans vs. multi-room homes with tight doorways.
  • Wi-Fi coverage — cloud-heavy robots need stable signal everywhere.
  • Household — pets, kids, shared spaces, and noise tolerance.

Purchase and deployment access

Available listings: 125. Pre-order listings: 54. Active records: 130. Available indicates an ordering listing, not confirmed stock. Pre-order indicates a reservation listing, not immediate delivery. Active status alone does not confirm public purchase availability or deployment. Other statuses do not establish a current purchase listing. Confirm regional access, stock, reservation terms, and delivery with the manufacturer.

When it's too close to call

If two robots are still neck-and-neck, use softer signals that affect ownership quality more than spec sheets admit.

Return policy User community Ecosystem Aesthetics

Comparison FAQ

Questions buyers ask before the final click

Short answers to the questions that usually show up once the shortlist is live and the tradeoffs feel real.

Frequently Asked Questions

Using the workspace
How many robots can I compare at once?
You can compare up to four robots at once. Two or three is usually the cleanest decision view, but four-way comparisons work well for wider market scans.
What does 'Show differences only' do?
It hides rows where all selected robots share the same value, leaving only the rows that actually change your decision. It is especially useful for same-brand or same-category shortlists.
Can I compare robots from different categories?
Yes. You can compare any of the 412 robots in the database. Cross-category comparisons work best when the robots still compete for the same outcome in your home or workflow.
What makes a good comparison?
The best pairings share at least one real-world anchor: same job, similar price band, same room constraints, or competing brand tier. That keeps the table decision-focused instead of random.
Sharing & shortlisting
How do I share a comparison?
Once you have a live shortlist, a Share this comparison link appears in the workbench. It preserves your selected robots and the differences-only toggle in a permanent URL.
Can I save or bookmark a comparison for later?
Yes. Every live comparison has a stable route, so bookmarking the page preserves the exact configuration you built.
Can I compare by price alone?
Price is one row in the compare table, but if you want pure price sorting first, the all robots page is the better place to shortlist before coming back here.
Data & methodology
Are specifications up to date?
ui44 comparison data is sourced from official manufacturer documentation and re-verified on a rolling basis. Shipping products get the most frequent freshness checks.
What if a spec is missing?
A dash or 'Not specified' usually means the manufacturer has not published the detail clearly. It does not automatically mean the robot lacks the feature.
How should I compare robots at different development stages?
Status labels describe catalog records, not measured operational reliability. Available indicates a purchase listing, not verified stock or shipping dates. Active alone does not confirm public purchase access. Pre-order indicates a reservation listing, not engineering completion or a guaranteed delivery queue position. Development and Prototype identify recorded stages; Discontinued identifies a discontinued listing. Compare documented performance and current manufacturer terms, including any recorded sales notes, for the specific model and region.
Can I compare specific sensors or components more deeply?
Yes. The compare table gives you the side-by-side overview, then the components directory lets you go deeper on shared sensors, radios, and platform pieces across the catalog.