StackBlitz

source

partial

public-repo

webcontainer-core is MIT but issue-tracker only (no runtime source)

actual-runtime

proprietary(StackBlitz)

license-terms

Proprietary, free for OSS/prototypes, commercial license required for for-profit production(charge beyond 10k API req/mo)

distribution

@webcontainer/api npm (proprietary binary)

The MIT-licensed "open" repository holds no implementation, while the runtime itself is closed and gated by a commercial license for production use. That makes it source available leaning closed, and the open framing around an MIT issue tracker overstates how open the product is. The WebContainer enterprise licensing page states that prototypes and proofs of concept need no commercial license while production use in a commercial, for-profit setting does; it no longer states the 10k-requests-per-month threshold it once set, and stackblitz/webcontainer-core has gone well over a year without a push.

• https://github.com/stackblitz/webcontainer-core recorded 2026-08-13

  MIT repo is a central hub for issues/bug reports, not the runtime implementation

• https://registry.npmjs.org/@webcontainer/api recorded 2026-08-13

  @webcontainer/api is the published client package for the runtime, pointing back at stackblitz/webcontainer-core; the package manifest carries MIT while the runtime it calls is a StackBlitz-hosted service

• https://webcontainers.io/enterprise recorded 2026-08-13

  prototypes and proofs of concept require no commercial license, but production use of the API in a commercial for-profit setting does, and access may be revoked for use in violation of those terms; no request-count threshold is stated