CodeSandbox alternatives: 3 free & open-source picks
Curated, verified, and actually free. No trials, no crippled tiers. Star counts and last-activity dates checked by hand, not scraped and forgotten.
ZombieVS Code in a browser; the cloud part is your server.
licenseMIT
runsyour server
installOfficial install script, package, Docker image, or Helm chart on a Linux server
dataRepositories, terminals, extensions, and VS Code user data live on the host/server filesystem and mounted home directories
vs CodeSandboxIt is only VS Code running on a server you operate, without CodeSandbox's instant disposable sandboxes, automatic previews, forks, share links, and managed collaboration.
setupRequires a server with roughly 1 GB RAM and two CPU cores, plus WebSocket-capable HTTPS/reverse-proxy and authentication configuration before exposing it publicly
facts verified 2026-08-10
Full cloud workspaces on your infrastructure; Terraform and PostgreSQL come along for the ride.
licenseAGPL-3.0+
runsyour server
installInstall the Coder control plane, connect PostgreSQL, then provision workspaces from Terraform templates; Helm is available for Kubernetes
enginesCoder's AI agent integrations support Anthropic, OpenAI, Google, Azure OpenAI, AWS Bedrock, OpenAI-compatible endpoints, OpenRouter, and Vercel AI Gateway
dataUsers' source and build artifacts live in the provisioned workspace disks, volumes, or cloud resources; Coder configuration, users, audit/control-plane state, and template/Terraform state live in PostgreSQL
vs CodeSandboxCoder is an infrastructure platform for durable workspaces, not an instant public browser sandbox, so setup, templates, and cloud resources replace CodeSandbox's one-click experience.
setupThe first obstacle is infrastructure, not the IDE: PostgreSQL, Terraform templates, cloud or cluster credentials, persistent workspace storage, and a reachable TLS URL are required
facts verified 2026-08-10
A real browser IDE platform, assuming Kubernetes already counts as normal in your house.
licenseEPL-2.0
runsyour server
installInstall the Che Operator on an existing Kubernetes or OpenShift cluster
dataSource normally lives in Git and checked-out workspace containers; persistent workspace data uses Kubernetes persistent volumes, while devfiles and platform configuration live in the cluster
vs CodeSandboxChe requires Kubernetes and substantial platform administration, and it cannot match CodeSandbox's quick shareable playgrounds, automatic previews, and low-friction onboarding.
setupA functioning Kubernetes/OpenShift cluster is a prerequisite, followed by operator, ingress, storage class, TLS, identity, quotas, and devfile administration
facts verified 2026-08-10
last updated 2026-08-10 · no votes, no pay-to-list · just what's real
| tool | license | running it | platforms | stars | active |
|---|---|---|---|---|---|
| code-server | MIT | docker to self-host | web, linux, self-hosted | 78,643 | 2026-08 |
| Coder | AGPL-3.0+ | self-host, real ops | web, macos, windows, linux, self-hosted | 13,300 | 2026-08 |
| Eclipse Che | EPL-2.0 | self-host, real ops | web, self-hosted | 7,200 | 2026-08 |
They pay to avoid managing dev machines for experiments and previews. If none of that applies to you, any pick above saves $144 a year.
Is there a free alternative to CodeSandbox?
Yes: code-server, Coder, Eclipse Che. Every tool on this page is either open source or genuinely free to use long-term: no trials, no crippled tiers.
Should I just build my own CodeSandbox?
Our verdict is KINDA. You can self-host a browser IDE, but fast templates, previews, cloud VMs, collaboration, and workflow integrations are the product. If you'd rather build, the exact one-shot prompt is free at canivibecodeit.com/codesandbox.
