WASI (WebAssembly System Interface)
Business Profile
Core Value Proposition
WASI (WebAssembly System Interface) provides a secure standard interface for software compiled to WebAssembly, enabling cross-language interoperability and portable execution across environments (browsers, clouds, and embedded devices).
Target Customer
Software developers building WebAssembly-enabled applications, including web apps, plugins, serverless functions, User-Defined Functions (UDFs) in databases, embedded controller components, and sidecar networking filters.
Key Differentiator
Cross-language interoperability and composability through standardized WASI APIs and the Component Model, enabling integration of modules from different languages without HTTP-based microservices.
Implementation Timeline
Not specified in content
Pain Points
- 1Fragmented and bespoke interfaces between languages and runtimes that complicate interoperability.
- 2Need for a secure, portable API surface that works across diverse environments (browsers to embedded devices).
- 3Reliance on HTTP-based microservices for plugin-style or SDK-heavy architectures can add overhead and complexity.
Key Features
- 1Standard WASI APIs across I/O, Clocks, Random, Filesystem, Sockets, CLI, HTTP (as part of WASI 0.2 and the Component Model).
- 2Component Model support for interoperable and composable WebAssembly components across languages (e.g., Rust with Go).
- 3Multiple runtime compatibility (Wasmtime, WAMR, WasmEdge, wazero, Wasmer, wasmi, wasm3, jco, pywasm).
- 4WIT (WebAssembly Interface Type) definitions used to describe and bind APIs in Wasm components.
- 5Roadmap and versioning up to WASI 0.3 with ongoing proposals and active development.
Target Customer Industries
Competitive Advantages
- 1Secure, standard interface for Wasm that reduces need for custom glue and network-based IPC.
- 2Facilitates cross-language collaboration and reuse of components from different languages and runtimes.
- 3Portable across environments, enabling a unified approach from browser to embedded devices.
- 4Active community and governance through the WASI Subgroup and Bytecode Alliance, with ongoing proposals and releases.
- 5Rich ecosystem of runtimes and tooling (e.g., WIT, Component Model) to support various use cases.
Key Benefits
Additional Product Information
Product Description
A group of standards-track API specifications that define secure, portable APIs for software compiled to WebAssembly, enabling cross-language interoperability and consistent interfaces across environments.
Target Market
Software developers and organizations building WebAssembly-enabled software, including plugin models, SDKs across languages, and multi-runtime applications.
Unique Value Proposition
Standardized, secure, cross-language APIs for WebAssembly that enable interoperable, portable software components without relying on HTTP-based microservices.
Technical Requirements
Requires WebAssembly; WASI API versions (0.1/0.2/0.3) and the Component Model; WIT for API bindings; runtimes such as Wasmtime, WAMR, WasmEdge, wazero, Wasmer, wasmi, wasm3, jco, pywasm
Pricing Model
Not provided
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