Freestyle
Run untrusted JavaScript and full dev servers, with git hosting and domains built in.
Compared on toolweight in:Sandbox providers
Related comparisons:Vercel alternatives
Logo assets
Freestyle brand colours
Extracted from the artwork and ranked by how much of the mark each covers — not from a brand book, so treat them as observed rather than official.
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What Freestyle is
Freestyle targets the specific shape of app-builder products: execute untrusted JavaScript, run a dev server the user can see, host the git repository, and attach a domain. That vertical integration is the point — the sandbox, the repo and the preview URL are one product rather than three vendors. The tradeoff is a JavaScript-centric runtime story and a much smaller surface than general-purpose providers.