Faasta is a cutting-edge Function-as-a-Service (FaaS) platform designed for exceptional speed and efficiency. With cold start times under 1ms and a memory overhead of less than 1KB, Faasta delivers unparalleled performance through its modern WebAssembly architecture.

• Runs your code as WebAssembly modules using the WASI P2 standard
• Leverages WASIHTTP for high-performance HTTP request handling
• Provides secure isolation between functions through WebAssembly's sandboxed execution model
• Achieves ultra-fast cold starts without the overhead of traditional containerization
• Self-hostable with simple setup - run your own Faasta instance anywhere
• Standards-compliant with WASI P2 and WASIHTTP, making your functions portable
• Powered by Wasmtime for efficient WebAssembly execution
• Includes a free hosted instance at faasta.xyz

Install the Faasta CLI:

cargo install cargo-faasta

Create a new Faasta project:

cargo faasta init
# or
cargo faasta new my-function

Build your function for WebAssembly:

Login with your GitHub account:

Deploy your function:

Your function will be available at https://your-function-name.faasta.xyz

Faasta implements the WebAssembly System Interface (WASI) Preview 2 specification and the WASIHTTP standard to enable:

• Standardized HTTP request and response handling
• Component-based architecture for better modularity
• Consistent interface for interacting with the host system
• Portable functions that can run on any WASI P2 compatible runtime

Because Faasta uses these open standards, your functions are not locked to a specific platform and can be hosted anywhere that supports these standards.

Faasta is fully self-hostable. You can run your own instance of the Faasta server to host your functions on your own infrastructure.

⚠️ Experimental Status Faasta is currently experimental. There will be breaking changes that will interupt service on the faasta.xyz instance.