{"data":{"slug":"wasmtime","name":"Wasmtime","tagline":"Apache-2.0 Bytecode Alliance WebAssembly runtime","category":"rust","categoryName":"Rust","url":"https://wasmtime.dev/","github":"https://github.com/bytecodealliance/wasmtime","pricing":"open-source","hook":"Wasmtime is the Bytecode Alliance runtime for WASI/Wasm components — embed sandboxed Wasm where containers are too heavy.","whatsGood":"Apache-2.0 (bytecodealliance/wasmtime). Cranelift-backed runtime with CLI and embedding APIs (Rust/C and friends), WASI and component-model work. Site at wasmtime.dev; ~19k★. Standard pick when you want standards-track Wasm outside the browser.","theCatch":"Vs WasmEdge / Wasmer (alternate Wasm runtimes) and vs containers: Wasmtime is a Wasm runtime, not a Docker replacement for every workload. WASI/component maturity and host ABI choices still shape what you can port; not a general app platform by itself.","verdict":"Apache-2.0 Wasm runtime. Standards-track sandbox vs WasmEdge/Wasmer; not a container stand-in.","addedAt":"2026-09-16","featured":false,"domain":"Rust","subSpecialty":"Systems","subcategory":"Systems","tags":["self-host","permissive","sandbox","containers","active"],"capabilities":[],"surfaces":["Self-host"],"ecosystem":["Rust"],"licenseModel":"Apache-2.0","githubStars":18733,"starsPerWeek":39,"access":"free","archived":false,"repo":{"createdAt":"2017-08-29","pushedAt":"2026-10-16","license":"Apache-2.0","archived":false,"checkedAt":"2026-10-19"}},"related":[{"slug":"rust-lang","name":"Rust","tagline":"Systems programming without the footguns"},{"slug":"tokio","name":"Tokio","tagline":"Async runtime for Rust"},{"slug":"axum","name":"Axum","tagline":"Web framework from the Tokio team"},{"slug":"actix-web","name":"Actix Web","tagline":"Fast Rust web framework"},{"slug":"serde","name":"Serde","tagline":"Serialization framework for Rust"}],"links":{"self":"/api/gems/wasmtime","html":"/gems/wasmtime","markdown":"/gems/wasmtime.md","category":"/api/gems?category=rust","categoryPage":"/stacks/rust"}}