The platforms this very site runs on, plus the rest of the mainstream free tier — where to host code, ship websites, store data, and share demos without a credit card. The bar: the free tier must be genuinely usable for real projects, not a timed trial. We run on two of these ourselves, so the reviews come from experience.
The default home of open source and most private code. Unlimited public and private repositories, free Actions CI minutes every month, GitHub Pages for static hosting, and package storage. The ecosystem integrations ( Dependabot, code scanning, Projects ) make the free tier feel like the product, not a demo.
Best for: version control, collaboration, CI/CD, and free static hosting via Pages.
Static sites and serverless functions on Cloudflare's edge network. The free tier is absurdly generous — unlimited bandwidth on Pages, 100,000 Worker requests per day, free D1 databases, KV, and R2 storage. This website runs on exactly this stack; the review is lived experience.
Best for: shipping fast sites and full apps on an edge network for free.
The smoothest frontend deployment experience: push to Git, get a preview URL for every branch. Excellent Next.js integration ( it is Next.js's parent company ), free hobby tier with generous bandwidth, and serverless functions included. Fair-use limits apply, but hobby projects rarely touch them.
Best for: deploying Next.js and modern frontend apps with zero configuration.
Vercel's closest peer for static and Jamstack hosting: Git-based deploys, instant rollbacks, split testing, and free forms handling on the starter plan. Its build plugins ecosystem and the generous free tier make it a solid second home for frontend projects.
Best for: Jamstack sites with build previews and form handling.
An open-source Firebase alternative built on real Postgres: database, authentication, instant APIs, storage, and realtime subscriptions. The free tier includes two projects with 500 MB of database — enough to run a genuine side project, not just a toy.
Best for: a real backend (Postgres + auth) without managing servers.
The social frontend playground: write HTML/CSS/JS in three panes and see results live. Free unlimited public pens, which double as shareable demos and teaching material. The community's "Picked Pens" are also a great way to see what CSS can do.
Best for: quick front-end experiments and shareable demos.
A full development environment in the browser — not just a playground. Real npm installs, DevServer for React/Vue/etc., and container-based sandboxes that mirror a local setup. Free tier covers public sandboxes with generous hours.
Best for: prototyping full framework apps without touching your machine.
Sixteen years of crowdsourced programming answers. Most searches end here before anywhere else, and the voting system usually surfaces the correct answer first. Asking is free; reading is unlimited; the real skill is searching it well ( include the error message, not your feelings about it ).
Best for: the fastest route from error message to fix.
The GitHub of machine learning: hundreds of thousands of open models, datasets, and Spaces ( free hosted demos you can deploy from a repo ). Free accounts can host models and demo apps — the easiest way to put an AI experiment online.
Best for: hosting and discovering open AI models with free demo deployment.
A free, production-grade CDN for npm packages and GitHub files — no configuration, no API keys, just a URL. Loads any package version through a global multi-CDN network. Also handy as a permanent hosting trick for files committed to a public GitHub repo.
Best for: loading any npm package or GitHub file via a fast global CDN, free forever.
The reference regex debugger: live match highlighting, per-token explanation of what every symbol does, and a step-by-step match debugger that shows exactly where backtracking explodes. Supports PCRE, JavaScript, Python, and Go flavors. ( We built our own private regex tester too — but Regex101's explanation engine is genuinely excellent. )
Best for: understanding and debugging a regex token by token.
The all-in-one DevOps platform: repos, CI/CD, container registry, and issue tracking in one place. Its free tier is the strongest among code hosts for private automation — 400 CI compute minutes monthly and unlimited private collaborators on the free plan.
Best for: teams wanting built-in CI/CD without third-party wiring.