K-Bot

K-Bot is the flagship open-source humanoid robot from K-Scale Labs, a Y Combinator-backed startup that began in a Palo Alto garage with a mission to make robotics accessible to everyone.

Standing approximately 4 feet 7 inches (1.4m) tall and weighing 77 pounds (34kg), K-Bot is designed as an affordable full-size bipedal humanoid for developers and researchers. With a maximum payload capacity of 22 lbs (10kg) and 4 hours of battery life, it provides a practical platform for robotics development.

The robot features RGB, Stereo Vision, and Ultra-wide FOV cameras, coupled with farfield microphones and stereo speakers for multimodal interaction. K-Scale Labs has fully open-sourced the entire robotics stack, including hardware (mechanical design files), custom Rust-based operating system (K-OS), simulation tools, and AI models for vision, language, and action.

K-Bot uses the Genesis-world physics simulation engine for sim-to-real training, allowing it to safely learn skills like grasping objects and navigating obstacles in virtual environments before transferring to the physical robot. The initial release includes basic locomotion, balance control, voice commands, and app-based control.

Priced at $8,999 for the first 100 units shipping in late 2025, K-Bot is significantly more affordable than most humanoid robots. K-Scale Labs also offers Z-Bot, a budget-friendly 46cm option at $999 for hobbyists and entry-level developers.

The hardware is licensed under CERN-OHL-S and software under GPL v3, enabling users to fork, remix, and build their own versions.