Compare robots

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2 robots selected.

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

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StackChan David
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412 robots 9 categories 173 priced

Comparing 2 robots

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

StackChanDavid
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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.

StackChan

Record last checked: 2026-05-29

Official site Source context

David

Record last checked: 2026-05-25

Official site Source context
Each row compares one spec across your shortlist. Green marks the best value.
StackChan StackChan David David

Price

StackChan
$125 USD
Price details

Official M5Stack store lists the K151-R StackChan Remote Controller Kit at $125; the same listing is tagged Backorder while marked available. Kickstarter launch rewards used lower early-bird pricing and are not current retail pricing.

David
$95,000 USD
Price details

Starting at $95,000 for M-Series (upper-body modular) configuration. F-Series with motorized wheeled base starts at $125,000. Final price depends on customization level.

Height

StackChan
61.5 mm (product size 54.0 x 70.5 x 61.5 mm)
David
Not officially disclosed

Weight

StackChan
187.0 g
David
Not officially disclosed

Battery Life

StackChan
Not officially disclosed; built-in 550 mAh batteryNot safely comparable as a typed unit
David
F-Series product page lists an estimated 4–8 hours from the built-in battery; Realbotix's April 2026 delivery update separately says robots can have up to 10 hours and can operate continuously when plugged inNot comparable for this robot

Max Speed

StackChan
Not officially disclosed; 360° horizontal servo and 90° vertical servoNot safely comparable as a typed unit
David
Wheeled base, remote-controlled (specific speed not disclosed)Not safely comparable as a typed unit

AI

StackChan
Factory firmware includes an AI Agent for voice-based interaction, expressive animations, OTA updates, app-linked remote video/avatar control, and open development through Arduino, UiFlow2, PlatformIO, and ESP-IDF on the ESP32-S3 CoreS3 controller.
David
Proprietary/embedded Realbotix AI; official materials describe third-party integrations for local AI applications and cloud providers including ChatGPT/OpenAI and DeepSeek, with Llama, Gemini, and Claude rollouts planned

Sensors

StackChan
0.3 MP / 640 x 480 camera, Dual microphones, Proximity and ambient-light sensor, 9-axis IMU with accelerometer, gyroscope, and magnetometer, Three-zone touch panel, Full-featured NFC module, Infrared transmitter and receiver
David
Patented Eye-Tracking Vision System, AI Vision for Face Recognition, Emotion Interpretation Cameras, Computer Vision

Connectivity

StackChan
2.4 GHz Wi-Fi 802.11 b/g/n, Bluetooth 5 LE, USB-C / USB OTG, ESP-NOW wireless remote control, Grove expansion interfaces, GPIO, UART, and I2C
David
Wi-Fi

Status

StackChan
Available
David
Available

Category

StackChan
Companions
David
Companions
More specifications (4)

Includes rows even when values are not recorded.

Charging Time

StackChan
Not officially disclosed
David
Not disclosed

Degrees of Freedom

StackChan
N/A
David
N/A

Voice Assistants

StackChan
M5Stack AI Agent
David
Realbotix Custom AI

Manufacturer

StackChan
M5Stack
David
Realbotix

Capabilities

StackChan

2-axis pan-and-tilt head movementAI voice interactionArduino, UiFlow2, PlatformIO, and ESP-IDF programmabilityDesktop companion modeESP-NOW remote controlExpressive animated face and coordinated motionM5Stack Grove ecosystem expansionMobile-app video viewing and remote avatar controlNFC and three-zone touch interactionsOpen-source firmware and hardware-oriented developmentSmart-home and IoT control experiments

David

Autonomous Multilingual ConversationEmotion InterpretationEye Contact & Gaze TrackingFace Recognition & MemoryFacial Expression (14+ actuated points)Magnetically Swappable Face PlatesModular Body Panel CustomizationPersonality & Voice Customization

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.