The HopeJR vs Kepler Forerunner K2 "Bumblebee"
Generated from the registry · revision 2026-09-26 · openness out of 100
HopeJR has 14 more degrees of freedom (66 vs 52) than Kepler Forerunner K2 "Bumblebee". Listed prices: HopeJR $3,000, Kepler Forerunner K2 "Bumblebee" $30,000. Openness score: HopeJR 90, Kepler Forerunner K2 "Bumblebee" 0 (of 100); only HopeJR publishes CAD, BOM, SIM, FW and SW. Availability: HopeJR diy build, Kepler Forerunner K2 "Bumblebee" buy.
01
Side by side
■ rows differ| Field | The Robot Studio & Hugging FaceThe HopeJR | Kepler Robotics (Shanghai Kepler Exploration Robot Co.)Kepler Forerunner K2 "Bumblebee" | Δ first − second |
|---|---|---|---|
| Identity | |||
| Maker (differs) | The Robot Studio & Hugging Face | Kepler Robotics (Shanghai Kepler Exploration Robot Co.) | |
| Class | Humanoid | Humanoid | |
| Status | Active | Active | |
| Availability (differs) | DIY build | Buy | |
| Country (differs) | France | China | |
| Year (differs) | 2025 | 2024 | |
| Specifications | |||
| Height | —unsourced | 175cm | |
| Mass | —unsourced | 75kg | |
| Degrees of freedom (differs) | 66 | 52 | +14 (+27%) |
| Payload | —unsourced | 30kg | |
| Top speed | —unsourced | —unsourced | |
| Runtime | —unsourced | 480min | |
| Battery capacity | —unsourced | 2,330Wh | |
| Price (differs) | 3,000USD | 30,000USD | −27,000 USD (-90%) |
| Actuators (differs) | Robstride 02 (humanoid body update) | Hybrid roller-screw linear + rotary actuators | |
| Compute | —unsourced | 100 TOPS onboard | |
| Sensors | —unsourced | 80+ integrated sensors; tactile dexterous hands | |
| Openness and provenance | |||
| Openness bar | |||
| Openness score (differs) | 90/ 100 | 0/ 100 | +90 |
| CAD (25) (differs) | public | not public | |
| Bill of materials (20) (differs) | public | not public | |
| Sim model (URDF/MJCF) (20) (differs) | public | not public | |
| Firmware (15) (differs) | public | not public | |
| Software (10) (differs) | public | not public | |
| Trained policies (10) | not public | not public | |
| Verification level (differs) | L1 | L0 | |
| Sources (differs) | 4 | 2 | |
| Last checked (differs) | 2026-09-25 | 2026-09-24 | |
A dash is an unsourced figure, not zero. Sources for each robot are listed on its spec sheet: HopeJR, Kepler Forerunner K2 "Bumblebee".
02
Related comparisons
HopeJRvsHyperspawn DropbearHopeJRvsPUDU D9HopeJRvsUnitree G1HopeJRvsEngineAI PM01Kepler Forerunner K2 "Bumblebee"vsApptronik ApolloKepler Forerunner K2 "Bumblebee"vsHumanoid HMND 01Kepler Forerunner K2 "Bumblebee"vsMenteeBotKepler Forerunner K2 "Bumblebee"vsNEURA 4NE1Kepler Forerunner K2 "Bumblebee"vsHyperspawn Dropbear