Agility Cassie vs Hyperspawn Dropbear
Generated from the registry · revision 2026-09-26 · openness out of 100
Cassie has 22 fewer degrees of freedom (10 vs 32) than Dropbear. Dropbear lists at $9,999; Cassie is not for sale. Openness score: Cassie 20, Dropbear 100 (of 100); only Dropbear publishes CAD, BOM, FW, SW and POL. Availability: Cassie research only, Dropbear preorder.
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Side by side
■ rows differ| Field | Agility RoboticsAgility Cassie | Hyperspawn RoboticsHyperspawn Dropbear | Δ first − second |
|---|---|---|---|
| Identity | |||
| Maker (differs) | Agility Robotics | Hyperspawn Robotics | |
| Class (differs) | Biped | Humanoid | |
| Status (differs) | Discontinued | Active | |
| Availability (differs) | Research only | Preorder | |
| Country (differs) | United States | India | |
| Year (differs) | 2017 | 2023 | |
| Specifications | |||
| Height | —unsourced | 180cm | |
| Mass | —unsourced | 45kg | |
| Degrees of freedom (differs) | 10 | 32 | −22 (-69%) |
| Payload | —unsourced | 5kg | |
| Top speed | —unsourced | —unsourced | |
| Runtime | —unsourced | 120min | |
| Battery capacity | —unsourced | 960Wh | |
| Price (differs) | Not for sale | 9,999USD | |
| Actuators | —unsourced | MyActuator RMD-X10, RMD-X8, RMD-X6 and CEM-60 over 1 Mbit/s CAN (18 per the 2026 BOM; myactuator-can lists 12 RMD-X8 Pro, 4 RMD-X10 V3, 6 CEM-60); 6 NEMA 17 lead-screw steppers in the Stewart-platform neck. hyperspawn.ai: servo + QDD. | |
| Compute | —unsourced | NVIDIA Jetson AGX Orin 64GB (BOM; Orin NX 16GB alternative) plus one ESP32-DevKitC-V4 CAN node per limb. Kit: Raspberry Pi 5 base, Jetson Orin advanced. | |
| Sensors | —unsourced | Intel RealSense D455f depth camera, IMU (center-IMU controller role), foot load cells (4x HX711 per foot, dropbear-feet), actuator encoders; five AS5600 magnetic angle sensors per leg controller (observation-safe firmware) | |
| Openness and provenance | |||
| Openness bar | |||
| Openness score (differs) | 20/ 100 | 100/ 100 | −80 |
| CAD (25) (differs) | not public | public | |
| Bill of materials (20) (differs) | not public | public | |
| Sim model (URDF/MJCF) (20) | public | public | |
| Firmware (15) (differs) | not public | public | |
| Software (10) (differs) | not public | public | |
| Trained policies (10) (differs) | not public | public | |
| Verification level | L2 | L2 | |
| Sources (differs) | 3 | 16 | |
| Last checked (differs) | 2026-09-24 | 2026-09-25 | |
A dash is an unsourced figure, not zero. Sources for each robot are listed on its spec sheet: Cassie, Dropbear.
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