Playbit is a software platform and runtime for building joyful, personal-scale applications—programs made by individuals for themselves and their close circles. It provides a minimal, ABI-stable syscall interface that supports highly dynamic, collaborative graphical apps, with the ability to run on desktop, web, or mobile from a single codebase. The platform includes a C API, developer tools, and WebGPU support for rich multimedia experiences.
Funding
Funding not disclosed
Founders
Product
Problem
Developers who want to create personal-scale software—apps for themselves, friends, or small communities—often face a choice between building for the web, which imposes abstraction and compatibility constraints, or building native apps that are difficult to distribute across platforms. This limits the creation of highly dynamic, collaborative, and graphically rich applications that are easy to share and run.
Solution
Playbit provides a software platform and runtime designed specifically for making joyful, personal-scale software. The runtime acts like a minimal operating system, offering guest code a small, ABI-stable syscall interface with well-defined semantics. This allows developers to write an app once and run it on any platform—desktop, web, or mobile—either as WebAssembly or by linking the runtime as a native library. The platform includes a comprehensive C API, developer tools, and support for WebGPU, enabling the creation of powerful multimedia and collaborative applications.
Target Audience
Primary users are independent developers and small teams who want to build and share personal-scale, collaborative, and graphically rich applications without the constraints of web-only development.
Features
- Minimal ABI-stable syscall interface with well-defined semantics for predictable behavior
- Cross-platform runtime supporting macOS initially, with vision for desktop, web, and mobile
- Run apps as WebAssembly or natively by linking the Playbit runtime as a library
- Comprehensive C API covering foundation, memory, threads, networking, file system, graphics, and UI
- Built-in developer tools for automation and app management
- WebGPU support for high-performance graphics and compute workloads