--- title: Freestyle slug: freestyle url: "https://toolweight.com/tools/freestyle" homepage: "https://freestyle.sh" categories: sandbox-providers last_verified: 2026-11-07 dataset_version: 0738be72 license: CC-BY-4.0 --- # Freestyle > Run untrusted JavaScript and full dev servers, with git hosting and domains built in. - Targets app-builder products: run untrusted JavaScript, a visible dev server, git hosting and a domain - Vertical integration is the point: sandbox, repo and preview URL are one product, not three vendors - Tradeoff is a JavaScript-centric runtime and a much smaller surface than general-purpose providers ## Identity | | | | --- | --- | | Name | Freestyle | | Company | Freestyle | | One-liner | Run untrusted JavaScript and full dev servers, with git hosting and domains built in. | | Site | https://freestyle.sh | | Docs | https://docs.freestyle.sh | | Founded | 2024 | | Funding | Seed | | Compared in | 1 | ## Where it is compared ### [Sandbox providers](https://toolweight.com/compare/sandbox-providers) Ranked **#13 of 19** on default weights. | Field | Value | Confidence | Verified | Source | Note | Permalink | | --- | --- | --- | --- | --- | --- | --- | | Cold start | 700ms | Inferred | - | - | Estimate for the code-execution API; dev servers with a repo checkout take considerably longer. | https://toolweight.com/compare/sandbox-providers#freestyle--cold_start_measured | | Cold start (claimed) | - | Unknown | - | - | No consistently published figure. | https://toolweight.com/compare/sandbox-providers#freestyle--cold_start_claimed | | Isolation | microvm | Inferred | - | - | - | https://toolweight.com/compare/sandbox-providers#freestyle--isolation_tech | | Root in guest | ◐ | Inferred | - | - | Dev servers give you a shell; the execute API does not. | https://toolweight.com/compare/sandbox-providers#freestyle--root_access | | Egress control | allowlist | Inferred | - | - | Network access for executed code is opt-in per call. | https://toolweight.com/compare/sandbox-providers#freestyle--egress_control | | Max runtime | 1h | Inferred | - | - | Execution calls are short; dev servers persist while in use. | https://toolweight.com/compare/sandbox-providers#freestyle--max_runtime | | Persistent FS | ● | Inferred | - | - | Repos are hosted as git, which is the persistence layer. | https://toolweight.com/compare/sandbox-providers#freestyle--persistent_fs | | Snapshot & fork | ◐ | Inferred | - | - | Git branching substitutes for VM forking. | https://toolweight.com/compare/sandbox-providers#freestyle--snapshot_fork | | Custom images | ○ | Inferred | - | - | Managed runtime rather than arbitrary images. | https://toolweight.com/compare/sandbox-providers#freestyle--custom_images | | GPU | ○ | Inferred | - | - | - | https://toolweight.com/compare/sandbox-providers#freestyle--gpu | | Runtimes | javascript-typescript, python | Inferred | - | - | - | https://toolweight.com/compare/sandbox-providers#freestyle--language_runtimes | | Preview URLs | ● | Vendor-claimed | 2026-01-15 | https://docs.freestyle.sh | Dev server previews and custom domains are core to the product. | https://toolweight.com/compare/sandbox-providers#freestyle--preview_urls | | Browser inside | ○ | Inferred | - | - | - | https://toolweight.com/compare/sandbox-providers#freestyle--browser_in_sandbox | | File up/download | ● | Inferred | - | - | Filesystem and git APIs. | https://toolweight.com/compare/sandbox-providers#freestyle--file_transfer_api | | Sydney region | ○ | Inferred | - | - | - | https://toolweight.com/compare/sandbox-providers#freestyle--sydney_region | | Concurrent limit | 40 sandboxes | Vendor-claimed | 2026-11-07 | https://www.freestyle.sh/docs/vms/pricing-and-limits | Hobby plan allows up to 40 concurrent VMs (Free 10, Pro 400). | https://toolweight.com/compare/sandbox-providers#freestyle--max_concurrency | | MCP server | ◐ | Inferred | - | - | - | https://toolweight.com/compare/sandbox-providers#freestyle--mcp_server | | SDKs | typescript, rest-api | Inferred | - | - | - | https://toolweight.com/compare/sandbox-providers#freestyle--sdk_languages | | Streaming output | ● | Inferred | - | - | - | https://toolweight.com/compare/sandbox-providers#freestyle--streaming_stdout | | Price / hour | $0.13/hr | Vendor-claimed | 2026-11-07 | https://www.freestyle.sh/docs/vms/pricing-and-limits | Docs list $0.04032/vCPU-hr and $0.0129/GiB-hr: 2 x 0.04032 + 4 x 0.0129 = $0.132. Storage and transfer excluded. | https://toolweight.com/compare/sandbox-providers#freestyle--price_per_hour | | Meter | per-request | Inferred | - | - | Executions are per-call; dev servers are metered by uptime. | https://toolweight.com/compare/sandbox-providers#freestyle--billing_granularity | | Idle cost | storage-only | Inferred | - | - | - | https://toolweight.com/compare/sandbox-providers#freestyle--idle_billing | | GitHub stars | - | Inferred | - | - | - | https://toolweight.com/compare/sandbox-providers#freestyle--github_stars | | Funding | seed | Community-reported | - | - | - | https://toolweight.com/compare/sandbox-providers#freestyle--funding_stage | | Shipped | 2024 | Inferred | - | - | - | https://toolweight.com/compare/sandbox-providers#freestyle--launched | | Positioning | The backend for AI app builders: run code, host git, serve previews, attach domains. | Inferred | - | - | - | https://toolweight.com/compare/sandbox-providers#freestyle--positioning | **Verdict.** Collapses four vendors into one for Lovable-shaped app builders, wrong shape for anything outside JavaScript. ## Alternatives - [Blaxel](https://toolweight.com/tools/blaxel), Agent-first cloud claiming ~25 ms microVM boots from snapshots. - [boat](https://toolweight.com/tools/boat), Persistent Ubuntu VMs for agents with SSH, Docker and disk-level fork, billed per second. - [Cloudflare Sandbox](https://toolweight.com/tools/cloudflare-sandbox), Container sandboxes driven from a Worker, addressed through Durable Objects. - [CodeSandbox SDK](https://toolweight.com/tools/codesandbox-sdk), Firecracker VMs with memory snapshots, from the online IDE, now owned by Together AI. - [Daytona](https://toolweight.com/tools/daytona), Sub-second container sandboxes for agent workloads, from a team that built a dev-env manager. - [Self-hosted Firecracker](https://toolweight.com/tools/diy-firecracker), The baseline: Firecracker on your own metal, plus every hard part you now own. - [E2B](https://toolweight.com/tools/e2b), Open-source Firecracker sandboxes with Python and TypeScript SDKs for AI agents. - [exe.dev](https://toolweight.com/tools/exe-dev), Persistent VMs you SSH into, with root, apt and systemd, on a flat monthly plan. - [Fly.io Machines](https://toolweight.com/tools/fly-machines), Raw Firecracker microVMs with a REST API, durable volumes and 35+ regions. - [GitHub Codespaces](https://toolweight.com/tools/github-codespaces), Devcontainer-backed cloud VMs built for humans, occasionally repurposed for agents. - [Islo](https://toolweight.com/tools/islo), Per-agent isolated cloud sandboxes with enterprise policy controls, from Incredibuild. - [Modal](https://toolweight.com/tools/modal), Serverless Python compute with a Sandbox API bolted onto a GPU-first platform. ## Logo & brand colours SVG files: https://toolweight.com/teams/freestyle/logo.svg and https://toolweight.com/teams/freestyle/mono.svg. JSON: https://toolweight.com/api/v1/brands/freestyle. | Hex | oklch | | --- | --- | | #000000 | oklch(0.0% 0.000 0.0) | ## Licence and attribution Data from Toolweight (https://toolweight.com), licensed CC-BY-4.0. - Licence: [CC-BY-4.0](https://creativecommons.org/licenses/by/4.0/) - Canonical HTML: https://toolweight.com/tools/freestyle - Machine-readable: https://toolweight.com/tools/freestyle.md · https://toolweight.com/api/v1 · https://toolweight.com/mcp - Toolweight takes no affiliate revenue and sells no placements.