An open-source framework for building and running fast, secure, composable cloud microservices with WebAssembly.
Spin is an open-source framework for building and running serverless applications powered by WebAssembly. It provides a CLI tool and SDKs to create fast, secure, and composable cloud microservices, simplifying the development and deployment of WebAssembly-based applications. Spin leverages the WebAssembly component model and Wasmtime runtime to offer a sandboxed, high-performance environment.
Developers building cloud-native microservices, serverless applications, or exploring WebAssembly for secure, portable workloads. It's ideal for teams using languages like Rust, JavaScript, Go, or Python who want to deploy WebAssembly-based services.
Spin stands out by making WebAssembly microservices accessible with a streamlined developer experience, strong security through sandboxing, and support for multiple languages and triggers. It combines performance with ease of use, avoiding vendor lock-in while enabling composable, event-driven architectures.
Spin is the open source developer tool for building and running serverless applications powered by WebAssembly.
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Uses Wasmtime to run WebAssembly components in an isolated environment, preventing malicious code from affecting the host system, as emphasized in the security philosophy.
Officially supports Rust, Go, JavaScript, and Python SDKs, with community extensions for Zig and Moonbit, allowing diverse teams to build without language lock-in.
Includes built-in APIs for HTTP, databases (SQLite, MySQL, PostgreSQL), key-value storage, Redis, and serverless AI, reducing external dependencies for cloud-native workflows.
The `spin` CLI simplifies creating, building, and running applications locally, as shown in the quickstart with commands like `spin new`, `spin build`, and `spin up`.
Language SDKs lack full parity; for example, the C# SDK doesn't support Redis triggers, key-value storage, or serverless AI, and Python lacks MySQL support, limiting functionality.
Only the Rust SDK supports authoring custom triggers, restricting extensibility for developers using other languages like JavaScript or Go.
Relies on the evolving WebAssembly component model, which may lead to fewer libraries, community resources, or potential breaking changes compared to established runtimes.