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

1Technology

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

1Cross-language interoperability

2Environment portability (browsers to embedded devices)

3Secure standard APIs for Wasm

4Multi-runtime and multi-language support

5Component Model for interoperable composition

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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