IRON vs Walker S2
Side-by-side comparison of IRON (XPeng) and Walker S2 (UBTECH Robotics Corp Ltd.) — specs, pricing, Robolist Product Score, and verified deployments. Updated daily.
Optimize comparison for buyer
Optimized for Hospitality & F&B buyers. Priority specs lifted to the top and marked with a target.
Layer 1: Identity & Trust
Manufacturer Country
- IRONChina
- Walker S2China
Year First Available
- IRON2024
- Walker S22012
Verified Deployments
- IRON0 Deployments
- Walker S20 Deployments
Layer 2: Operational
Price Range (USD)
- IRON$150,000
- Walker S2$90,000
Battery / Shift Runtime
- IRON—
- Walker S22 hrs
Availability Status
- IRONACTIVE
- Walker S2ACTIVE
Physical Form Factor
Weight
- IRON70 kg
- Walker S295 kg
Height
- IRON1780 mm
- Walker S2176 mm
Mobility Type
- IRONbipedal
- Walker S2bipedal
Humanoid Subtype
- IRONfull bipedal
- Walker S2full bipedal
Walking Speed
- IRON1.2 m/s
- Walker S22 m/s
Stair Climbing
- IRONNo
- Walker S2Yes
Terrain
- IRONflat floors, carpets, tiles, slight inclines
- Walker S2flat indoor, stairs
Payload & Dexterity
Payload
- IRON5 kg
- Walker S252 kg
Total DOF
- IRON22
- Walker S252
Arm DOF
- IRON22
- Walker S27
Hand DOF
- IRON22
- Walker S27
Bimanual Coordination
- IRONYes
- Walker S2Yes
Compute & AI
Onboard Compute
- IRONTuring AI chip
- Walker S2X86 + NVIDIA Jetson Orin
VLM Capable
- IRONNo
- Walker S2No
Foundation Models
- IRONfalse
- Walker S2false
Imitation Learning
- IRONNo
- Walker S2No
Programming
- IRONcode_python, no_code_gui
- Walker S2code_ros
Battery & Power
Runtime
- IRON8.5 hrs
- Walker S22 hrs
Battery Swap
- IRONNo
- Walker S2Yes
Software
SDK Languages
- IRONPython
- Walker S2Python
ROS Support
- IRONNo
- Walker S2Yes
Open API
- IRONYes
- Walker S2Yes
Reliability
Deployment Maturity
- IRONcommercial
- Walker S2commercial
Commercial
Price (USD)
- IRON$150,000
- Walker S2$90,000
Price Tier
- IRON150K+
- Walker S280-150K
Pricing Model
- IRONpurchase
- Walker S2purchase
Warranty
- IRON2 yrs
- Walker S2—
Applications
- IRONelectric_vehicle_assembly, administrative_support, customer_service_operations, household_assistance
- Walker S2industrial automation, 24/7 manufacturing
| ||
|---|---|---|
| Layer 1: Identity & Trust | ||
| Manufacturer Country | China | China |
| Year First Available (values differ) | 2024 | 2012 |
| Verified Deployments | 0 Deployments | 0 Deployments |
| Layer 2: Operational | ||
| Price Range (USD) (values differ) | $150,000 | $90,000 |
| Battery / Shift Runtime (priority for Hospitality & F&B buyers) (values differ) | — | 2 hrs |
| Availability Status | ACTIVE | ACTIVE |
| Layer 3: Category Specific | ||
| Physical Form Factor | ||
| Weight (priority for Hospitality & F&B buyers) (values differ) | 70 kg | 95 kg |
| Height (values differ) | 1780 mm | 176 mm |
| Mobility Type | bipedal | bipedal |
| Humanoid Subtype | full bipedal | full bipedal |
| Walking Speed (values differ) | 1.2 m/s | 2 m/s |
| Stair Climbing (values differ) | No | Yes |
| Terrain (values differ) | flat floors, carpets, tiles, slight inclines | flat indoor, stairs |
| Payload & Dexterity | ||
| Payload (values differ) | 5 kg | 52 kg |
| Total DOF (values differ) | 22 | 52 |
| Arm DOF (values differ) | 22 | 7 |
| Hand DOF (values differ) | 22 | 7 |
| Bimanual Coordination | Yes | Yes |
| Compute & AI | ||
| Onboard Compute (values differ) | Turing AI chip | X86 + NVIDIA Jetson Orin |
| VLM Capable | No | No |
| Foundation Models | false | false |
| Imitation Learning | No | No |
| Programming (values differ) | code_python, no_code_gui | code_ros |
| Battery & Power | ||
| Runtime (values differ) | 8.5 hrs | 2 hrs |
| Battery Swap (values differ) | No | Yes |
| Software | ||
| SDK Languages (values differ) | Python | Python |
| ROS Support (values differ) | No | Yes |
| Open API | Yes | Yes |
| Reliability | ||
| Deployment Maturity | commercial | commercial |
| Commercial | ||
| Price (USD) (values differ) | $150,000 | $90,000 |
| Price Tier (values differ) | 150K+ | 80-150K |
| Pricing Model | purchase | purchase |
| Warranty (values differ) | 2 yrs | — |
| Applications (values differ) | electric_vehicle_assembly, administrative_support, customer_service_operations, household_assistance | industrial automation, 24/7 manufacturing |
Insufficient data for full comparison
The following fields had no data for any of the selected robots: Running Capable, Payload (Peak), Arm Reach, Grip Strength, Manipulation Repeatability, Tool Use, Compute Platform, Teleoperation, Battery Capacity, Charging Time, Charging Method, Avg Power Consumption, Force-Limited Arms, Fall Recovery, Fall Detection Response, Emergency Stops, Human Detection Method, Safe Speed Near Humans, Simulation Platforms, Air-Gap Capable, MTBF, Task Success Rate, IP Rating, Noise Level, RaaS / Month, Developer Unit Price, Delivery Lead Time, Production Pilots
best in categoryweakest in categoryvalues differ
Trade-offs at a glance
Frequently asked
Who makes IRON and Walker S2?
IRON is made by XPeng, based in CN. Walker S2 is made by UBTECH Robotics Corp Ltd., based in CN.
When were IRON and Walker S2 launched?
IRON launched in 2024. Walker S2 launched in 2012.
How much does IRON cost compared to Walker S2?
IRON is listed at $150,000. Walker S2 is listed at $90,000.
How do IRON and Walker S2 compare on the Robolist Product Score?
IRON scores 62/100. Walker S2 scores 55/100. The Product Score blends specs, pricing transparency, verified deployments, and independent media coverage — see methodology for the full breakdown.
What is the payload difference between IRON and Walker S2?
IRON carries up to 5 kg. Walker S2 carries up to 15 kg.
Are IRON and Walker S2 in the same category?
Both robots are classified as Humanoid on Robolist. Filters and ranking treat them as direct alternatives.
What is the realistic total cost of ownership for Humanoid robots?
Hardware cost is one input. Humanoid TCO also includes integration, training, downtime, and end-of-life. Our breakdown: Humanoid TCO: Hardware, Cloud Subscriptions, and the Cost of Teleop Time.
What should a buyer ask vendors when choosing between IRON and Walker S2?
Spec sheets only show part of the story. Useful vendor questions cover support, lifecycle, integration cost, and references. We have a buyer-focused checklist: Vendor Selection for Humanoids: The 10 Questions You Must Ask.
Going deeper — picking the right robot
Humanoid TCO: Hardware, Cloud Subscriptions, and the Cost of Teleop Time
8 min readHumanoid Robots
Vendor Selection for Humanoids: The 10 Questions You Must Ask
10 min readHumanoid Robots
Running a Humanoid Pilot: Scope, Success Criteria, and Exit Options
9 min readHumanoid Robots
Build vs buy vs lease: which model fits a first deployment
8 min readChoosing Your First Robot
The hidden specs vendors hope you'll miss
10 min readReading the Spec Sheet
About this comparison
IRON vs Walker S2 compares two robots in the humanoid category. All data is sourced from manufacturer spec sheets, verified deployments, and third-party filings; see our methodology for how the Robolist Product Score is calculated.