historical guide · 4 editor-verified alternatives · Cloud9 IDE overview →
source: tools.alternatives · stored order · active records only; review scores are annotations and never change membership or order
discontinued Cloud9’s standalone c9.io era ended after the AWS acquisition, and AWS Cloud9 itself is now a legacy service. AWS documentation states that Cloud9 is no longer available to new customers, while existing customers can continue to use it as normal. The practical replacement path is migration to current AWS developer tools or modern cloud IDEs rather than a revived Cloud9 product.
GitHub Codespaces is a cloud-hosted development environment that spins up a full VS Code workspace in a dev container directly from any GitHub repo. Configurable via devcontainer.json, prebuilt for fast cold starts, and accessible through the browser or local VS Code. Used by teams that want zero-setup onboarding, consistent environments, and reproducible builds across platforms.
Gitpod is an open-source cloud development environment platform that launches ephemeral, pre-configured workspaces in seconds from any Git repository on GitHub, GitLab, or Bitbucket. Configured via .gitpod.yml, it ships a full VS Code / JetBrains IDE, cached prebuilds, and workspace snapshots — eliminating 'works on my machine' for distributed teams and open-source contributors.
StackBlitz is a browser-based development environment powered by WebContainers — a WebAssembly micro-OS that runs Node.js natively inside the browser. Boot full-stack Next.js, Vite, Angular, or Astro apps in milliseconds with no remote VM, share live via URL, and embed interactive code examples in docs. Also the home of Bolt.new, StackBlitz's AI full-stack app builder.
Browser-based IDE and cloud platform with a built-in AI agent that builds full-stack applications from natural language prompts. Supports 50+ languages with instant hosting, multiplayer collaboration, built-in databases (PostgreSQL, key-value), secrets management, and one-click deployment. Used by 30M+ developers for prototyping, learning, and shipping apps. Features Ghostwriter AI for code completion. Popular for hackathons, education, and rapid MVP development.
Gitpod — see all open-source developer tools.
GitHub Codespaces, Gitpod, StackBlitz, Replit offer a free plan or free tier.
GitHub Codespaces tops our editor-verified list of 4 Cloud9 IDE alternatives, scoring 85/100 in our hands-on review.
Yes — Gitpod are open source.
Yes — GitHub Codespaces, Gitpod, StackBlitz, and more offer a free plan or free tier.
Cloud9 IDE has been discontinued — Cloud9’s standalone c9.io era ended after the AWS acquisition, and AWS Cloud9 itself is now a legacy service. AWS documentation states that Cloud9 is no longer available to new customers, while existing customers can continue to use it as normal. The practical replacement path is migration to current AWS developer tools or modern cloud IDEs rather than a revived Cloud9 product. The closest editor-verified replacements are GitHub Codespaces, Gitpod, StackBlitz.