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M5Stack Stack-chan
Open-source kawaii AI desktop companion built on the M5Stack CoreS3
71.7
out of 100
Overview
M5Stack's Stack-chan is the most accessible AI desktop companion in production. Co-created by M5Stack and the open-source community, it pairs the flagship CoreS3 development kit (ESP32-S3, Wi-Fi/BLE, 2.0" capacitive touch display, 0.3 MP camera, 9-axis IMU, dual mics) with a 2-servo body, 12 RGB LEDs, NFC and IR — all driven by the XiaoZhi AI agent and a StackChan World iOS app supporting video calls and remote avatars. Fully programmable via Arduino and UiFlow2, Stack-chan launched on Kickstarter and is now shipping at $99 from shop.m5stack.com — still undercutting every commercial rival by a wide margin.
Score Breakdown
Conversation Quality
69%
LLM Integration
XiaoZhi cloud AI agent
8/10
Response Naturalness
Conversational voice + face animations
7/10
Long-term Memory
Basic on-device state
5/10
Category weight: 24%
Social Interaction
72%
Emotion Recognition
0.3 MP camera + proximity
6/10
Physical Expression
320×240 face + 12 RGB LEDs + 2-axis motion
8/10
User Engagement
Video calls, multi-device discovery, NFC tap
8/10
Category weight: 25%
Ease of Use
76%
Setup & Config
Wi-Fi + StackChan World iOS app
7/10
App & Voice
iOS app + remote avatar
8/10
Software Updates
Open-source OTA + community firmware
8/10
Category weight: 20%
Build Quality
60%
Build & Durability
M5Stack CoreS3 + servo body
7/10
Battery Life
700 mAh — modest untethered
5/10
Category weight: 14%
Value for Money
91%
Price / Performance
$99 — cheapest AI companion in production
10/10
Market Availability
In stock at shop.m5stack.com
7/10
Category weight: 12%
Ecosystem & Platform
52%
App Marketplace
No app store
2/10
Ecosystem Maturity
Very active OSS community
10/10
Category weight: 5%
Available skills 4
GitHub (community)
67/100
stack-chan
A JavaScript-driven M5Stack-embedded super-kawaii robot.
M5Stack Stack-chan
GitHub (community)
55/100
dotty-stackchan
Self-hosted infrastructure for Dotty (M5Stack StackChan → xiaozhi-esp32-server → ZeroClaw)
M5Stack Stack-chan
GitHub (community)
49/100
stack-chan
This is the repository for Stack-chan RT ver.
M5Stack Stack-chan
GitHub (community)
46/100
WebcamChan
UVCカメラとして動作するM5StackCoreS3用ファームウェア（ｳｪﾌﾞｶﾑﾁｬﾝ）
M5Stack Stack-chan
Technical Specifications
Controller
M5Stack CoreS3 (ESP32-S3 dual-core 240 MHz, 16 MB flash, 8 MB PSRAM)
Display
2.0" 320×240 capacitive touch IPS with glass cover
Camera
0.3 MP (GC0308)
Sensors
9-axis IMU + proximity + 3-zone touch panel
Motion
2 servos — 360° continuous head pan + 90° tilt
LEDs
12 RGB (two rows) + IR transmitter & receiver
Audio
1 W speaker + dual microphones
Connectivity
Wi-Fi 2.4 GHz + BLE, USB-C, microSD, NFC
Battery
700 mAh Li-ion (USB-C charging)
AI
XiaoZhi cloud agent + iOS app video calls
Programming
Arduino + UiFlow2 (open-source firmware)
Pros & Cons
Strengths
- Cheapest true AI companion robot in production at $99
- Built on the proven M5Stack CoreS3 — fully programmable via Arduino & UiFlow2
- Includes XiaoZhi AI agent, 0.3 MP camera and iOS app video calls out of the box
- 2-axis servo head, 320×240 animated face, 12 RGB LEDs, NFC and IR — unmatched feature density at the price
- Open-source community: peer-to-peer device discovery and remote-avatar mode
Weaknesses
- Sold mainly through the M5Stack shop — limited Amazon / retail distribution
- Modest 700 mAh battery limits untethered runtime
- ESP32-S3 compute trails Raspberry Pi-class companions on heavy AI workloads
- Software still in active development — features and firmware may evolve
Reviewed by
Jaime Delgado
Verify on LinkedIn
Robot enthusiast, former lawyer turned software developer and product expert. Grew up reading every Asimov story ever written — left deeply marked by R. Daneel Olivaw and R. Giskard Reventlov. Spent 25 years convinced this day would never come.
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