# Wasmer

🚀 Fast, secure, lightweight containers based on WebAssembly

Repository: https://github.com/wasmerio/wasmer
Canonical: https://ross.abutalabs.com/products/wasmer
Homepage: https://wasmer.io
Language: Rust
License: MIT
License Family: permissive
Topics: webassembly, wasm, wasi, emscripten, rust, windows, macos, linux, wasmer, wasix
Last push: 2026-08-26T13:29:55+00:00
Link (homepage): https://wasmer.io
Link (site_page): https://wasmer.io/pricing
Link (site_page): https://wasmer.io/about

## Health v2 (maintenance only)
Score: 99/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 98, longevity 100
- inputs: {"age_days": 2883, "days_push": 7, "days_rel": 12, "gap_med": 23.0, "n_releases_24m": 17}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 20973, forks 995 (observed 2026-08-28T04:11:30.546241+00:00)

## What it is
Wasmer is a high-performance WebAssembly runtime that runs lightweight, secure, sandboxed containers anywhere from desktops to cloud, edge, and browsers. It supports WASI and WASIX out of the box and offers embeddable SDKs for multiple languages including Rust, Go, Python, PHP, and JavaScript.

## Use cases
- run webassembly binaries as lightweight containers
- sandbox untrusted code with no file or network access by default
- embed a wasm runtime in go, python, php, or javascript applications
- run cli tools and server apps on any platform without recompiling
- deploy websites and apps to the edge with millisecond cold starts
- run wasi and wasix programs at near-native speed

## When to choose
- you need a fast, secure wasm runtime with broad platform support
- you want lightweight container-like sandboxing without docker
- you need to embed wasm execution into another language via an SDK
- you want to run the same binary across desktop, cloud, edge, and browser

## When to avoid
- you need full Linux container compatibility with arbitrary syscalls
- your workload depends on native libraries or hardware not exposed via WASI
- you need mature orchestration features like Kubernetes integration

## Facets
- artifact type: application
- maturity: active
- function: container-runtime, interpreter, compiler, sdk, cli, developer-tools
- domain: developer-tools, cloud-computing, cross-platform, self-hosted, web-development
- platform: windows, cross-platform, cli, wasm, browser, rust, python, go, php
- tags: webassembly, wasm-runtime, wasi, wasix, lightweight-containers, sandboxing, edge-computing, embeddable, linux, macos, nodejs

## Member repositories
- wasmerio/wasmer (main) score 99
- wasmerio/wasmer-go (sdk) score 25
- wasmerio/wasmer-python (sdk) score 23
- wasmerio/wasmer-sdk (sdk) score 68
- wasmerio/wasmer-php (sdk) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:30.546241+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T16:58:30.622225+00:00, confidence not recorded.
  - readme: https://github.com/wasmerio/wasmer (fetched 2026-08-28T04:11:30.546241+00:00, sha cc1f5f2e25f6)
  - homepage: https://wasmer.io (fetched 2026-08-29T07:57:07.967332+00:00, sha 760155c4b5eb)
  - site_page: https://wasmer.io/about (fetched 2026-08-29T07:57:07.978964+00:00, sha b763b3632643)
  - registry_crates: https://crates.io/api/v1/crates/wasmer (fetched 2026-08-29T07:57:07.980610+00:00, sha 435941bf238f)
  - site_page: https://wasmer.io/pricing (fetched 2026-08-29T07:57:07.977164+00:00, sha 7910df21da63)
- Data as of 2026-08-30T08:39:29.467469+00:00.