Mercury X1 vs Walker S1
Side-by-side comparison of Mercury X1 (Elephant Robotics) and Walker S1 (UBTECH Robotics Corp Ltd.) — specs, pricing, Robo Score, and verified deployments. Updated daily.
Optimize comparison for buyer
Optimized for Agriculture buyers. Priority specs lifted to the top and marked with a target.
Layer 1: Identity & Trust
Manufacturer Country
- Mercury X1China
- Walker S1China
Year First Available
- Mercury X12023
- Walker S12024
Verified Deployments
- Mercury X10 Deployments
- Walker S10 Deployments
Layer 2: Operational
Price
- Mercury X1$15,999 USD
- Walker S1$75,000 USD
Battery / Shift Runtime
- Mercury X18 hrs
- Walker S12 hrs
Availability Status
- Mercury X1ACTIVE
- Walker S1ACTIVE
Physical Form Factor
Height
- Mercury X1118 mm
- Walker S1130 mm
Weight
- Mercury X155 kg
- Walker S176 kg
Mobility Type
- Mercury X1bipedal
- Walker S1bipedal
Humanoid Subtype
- Mercury X1full bipedal
- Walker S1full bipedal
Walking Speed
- Mercury X11.2 m/s
- Walker S10.8 m/s
Stair Climbing
- Mercury X1Yes
- Walker S1Yes
Terrain
- Mercury X1flat indoor, uneven outdoor
- Walker S1flat indoor, uneven outdoor, gravel, tile, thick carpet, lawn
Payload & Dexterity
Payload
- Mercury X11 kg
- Walker S110 kg
Total DOF
- Mercury X119
- Walker S141
Arm DOF
- Mercury X19.5
- Walker S17
Hand DOF
- Mercury X1—
- Walker S16
Arm Reach
- Mercury X145 cm
- Walker S160 cm
Manipulation Repeatability
- Mercury X1±0.05 mm
- Walker S1—
Bimanual Coordination
- Mercury X1No
- Walker S1Yes
Compute & AI
Onboard Compute
- Mercury X167 TOPS
- Walker S1Intel i7 8665U Frequency 1.9Ghz *2, NVIDIA GT1030 graphics card, 384 cores
Compute Platform
- Mercury X1Jetson Orin Nano SUPER 8GB
- Walker S1—
VLM Capable
- Mercury X1No
- Walker S1No
Foundation Models
- Mercury X1false
- Walker S1false
Imitation Learning
- Mercury X1No
- Walker S1No
Programming
- Mercury X1CAN Bus/WIFI/Network port/Bluetooth/USB serial port
- Walker S1ROS 2.0
Battery & Power
Runtime
- Mercury X18 hrs
- Walker S12 hrs
Battery Swap
- Mercury X1No
- Walker S1No
Software
SDK Languages
- Mercury X1Python, ROS1, ROS2
- Walker S1Python
ROS Support
- Mercury X1No
- Walker S1Yes
Open API
- Mercury X1No
- Walker S1Yes
Reliability
Deployment Maturity
- Mercury X1commercial
- Walker S1commercial
Commercial
Price (USD)
- Mercury X1$15,999 USD
- Walker S1$75,000 USD
Price Tier
- Mercury X140-80K
- Walker S140-80K
Pricing Model
- Mercury X1—
- Walker S1purchase
Warranty
- Mercury X1—
- Walker S12 yrs
Applications
- Mercury X1robotics research and development, human-robot interaction research
- Walker S1service, entertainment, education
| | |
|---|---|---|
| Layer 1: Identity & Trust | ||
| Manufacturer Country | China | China |
| Year First Available (values differ) | 2023 | 2024 |
| Verified Deployments | 0 Deployments | 0 Deployments |
| Layer 2: Operational | ||
| Price (values differ) | $15,999 USD | $75,000 USD |
| Battery / Shift Runtime (priority for Agriculture buyers) (values differ) | 8 hrs | 2 hrs |
| Availability Status | ACTIVE | ACTIVE |
| Layer 3: Category Specific | ||
| Physical Form Factor | ||
| Height (values differ) | 118 mm | 130 mm |
| Weight (values differ) | 55 kg | 76 kg |
| Mobility Type | bipedal | bipedal |
| Humanoid Subtype | full bipedal | full bipedal |
| Walking Speed (values differ) | 1.2 m/s | 0.8 m/s |
| Stair Climbing | Yes | Yes |
| Terrain (values differ) | flat indoor, uneven outdoor | flat indoor, uneven outdoor, gravel, tile, thick carpet, lawn |
| Payload & Dexterity | ||
| Payload (values differ) | 1 kg | 10 kg |
| Total DOF (values differ) | 19 | 41 |
| Arm DOF (values differ) | 9.5 | 7 |
| Hand DOF (values differ) | — | 6 |
| Arm Reach (values differ) | 45 cm | 60 cm |
| Manipulation Repeatability (values differ) | ±0.05 mm | — |
| Bimanual Coordination (values differ) | No | Yes |
| Compute & AI | ||
| Onboard Compute (values differ) | 67 TOPS | Intel i7 8665U Frequency 1.9Ghz *2, NVIDIA GT1030 graphics card, 384 cores |
| Compute Platform (values differ) | Jetson Orin Nano SUPER 8GB | — |
| VLM Capable | No | No |
| Foundation Models | false | false |
| Imitation Learning | No | No |
| Programming (values differ) | CAN Bus/WIFI/Network port/Bluetooth/USB serial port | ROS 2.0 |
| Battery & Power | ||
| Runtime (values differ) | 8 hrs | 2 hrs |
| Battery Swap | No | No |
| Software | ||
| SDK Languages (values differ) | Python, ROS1, ROS2 | Python |
| ROS Support (values differ) | No | Yes |
| Open API (values differ) | No | Yes |
| Reliability | ||
| Deployment Maturity | commercial | commercial |
| Commercial | ||
| Price (USD) (values differ) | $15,999 USD | $75,000 USD |
| Price Tier | 40-80K | 40-80K |
| Pricing Model (values differ) | — | purchase |
| Warranty (values differ) | — | 2 yrs |
| Applications (values differ) | robotics research and development, human-robot interaction research | service, entertainment, education |
Insufficient data for full comparison
The following fields had no data for any of the selected robots: Running Capable, Payload (Peak), Grip Strength, Tool Use, 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
ROI Comparison
Same operating assumptions across every robot — the only difference is price. Set your numbers once to see which pays back fastest.
Annual labor displaced (per robot): $50,000
| Metric | Mercury X1 | Walker S1 |
|---|---|---|
| Investment | $15,999 | $75,000 |
| Payback period | 3.8 mo | 18.0 mo |
| Net savings (5 yr) | $234,001 | $175,000 |
| ROI (5 yr) | +1463% | +233% |
Estimates labor-cost displacement only — not a full total cost of ownership. Actual ROI depends on integration, maintenance, training, downtime, and task fit. Converted currencies are indicative; USD is the price of record.
Trade-offs at a glance
Frequently asked
Who makes Mercury X1 and Walker S1?
Mercury X1 is made by Elephant Robotics, based in CN. Walker S1 is made by UBTECH Robotics Corp Ltd., based in CN.
When were Mercury X1 and Walker S1 launched?
Mercury X1 launched in 2023. Walker S1 launched in 2024.
How much does Mercury X1 cost compared to Walker S1?
Mercury X1 is listed at $15,999. Walker S1 is listed at $75,000.
How do Mercury X1 and Walker S1 compare on the Robo Score?
Mercury X1 scores 57.0 on the Robo Score. Walker S1 scores 69.6. The Robo Score is a 0–100 credibility figure blending commercial maturity, verified deployments, company standing, and independent coverage — see methodology for the full breakdown.
What is the payload difference between Mercury X1 and Walker S1?
Mercury X1 carries up to 1 kg. Walker S1 carries up to 10 kg.
Are Mercury X1 and Walker S1 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 Mercury X1 and Walker S1?
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
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About this comparison
Mercury X1 vs Walker S1 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 Robo Score is calculated.