Side-by-side comparison of PETRA (MetraLabs) and UnicornBot (UBTECH Robotics Corp Ltd.) — specs, pricing, Robolist Product Score, and verified deployments. Updated daily.
Optimize comparison for buyer
Optimized for Warehousing & Logistics buyers. Priority specs lifted to the top and marked with a target.
Manufacturer Country
Year First Available
Verified Deployments
Price Range (USD)
Availability Status
Robot Weight
Compartment Type
Dimensions
Navigation Type
Auto Docking
Fleet Management
Floor Compatibility
Voice Interaction
Languages Supported
Price (USD)
Warranty
| Layer 1: Identity & Trust | ||
| Manufacturer Country (values differ) | — | China |
| Year First Available (values differ) | 2013 | 2018 |
| Verified Deployments | 0 Deployments | 0 Deployments |
| Layer 2: Operational | ||
| Price Range (USD) (values differ) | Contact for quote | $120 |
| Availability Status | ACTIVE | ACTIVE |
| Layer 3: Category Specific | ||
| Physical | ||
| Robot Weight (values differ) | — | 1.3 kg |
| Compartment Type (values differ) | open trays | — |
| Dimensions (values differ) | — | 254x305x64 |
| Navigation & Safety | ||
| Navigation Type (values differ) | lidar slam,natural landmark | — |
| Power | ||
| Auto Docking (values differ) | Yes | — |
| Integration | ||
| Fleet Management (values differ) | centralized cloud | — |
| Floor Compatibility (values differ) | hard floor | — |
| Display & UX | ||
| Voice Interaction (values differ) | — | Yes |
| Languages Supported (values differ) | — | English, Chinese |
| Commercial | ||
| Price (USD) (values differ) | Contact for quote | $120 |
| Warranty (values differ) | — | 1 yrs |
Insufficient data for full comparison
The following fields had no data for any of the selected robots: Battery / Shift Runtime, Payload, Tray Count, IP Rating, Max Speed, Min Passable Width, Battery Runtime, Charge Time, Hot-Swap Battery, Elevator API, PMS / POS Integration, Display Size, Noise Level, RaaS / Month
Frequently asked
PETRA is made by MetraLabs. UnicornBot is made by UBTECH Robotics Corp Ltd., based in CN.
PETRA launched in 2013. UnicornBot launched in 2018.
PETRA scores 0/100. UnicornBot scores 46/100. The Product Score blends specs, pricing transparency, verified deployments, and independent media coverage — see methodology for the full breakdown.
Both robots are classified as Hospitality Service on Robolist. Filters and ranking treat them as direct alternatives.
Hardware cost is one input. Hospitality Service TCO also includes integration, training, downtime, and end-of-life. Our breakdown: Service Robot TCO Across Hotels, Restaurants, Retail, and Senior Care.
Spec sheets only show part of the story. Useful vendor questions cover support, lifecycle, integration cost, and references. We have a buyer-focused checklist: Service Robot SLAs and Contract Red Flags.
Going deeper — picking the right robot
Service Robot TCO Across Hotels, Restaurants, Retail, and Senior Care
9 min readService Robots
Service Robot SLAs and Contract Red Flags
10 min readService Robots
Service Robot Pilot: A 60-Day Evaluation Framework
10 min readService 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
PETRA vs UnicornBot compares two robots in the hospitality-service 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.