Turborepo

Turborepo makes monorepo builds fast by caching everything and only rebuilding what changed. Instead of running tests and builds for your entire repo on every commit, Turborepo figures out which packages were affected and skips the rest.

Fully free under MIT. The CLI, task runner, local caching, and all core features cost nothing. Vercel offers Remote Caching (sharing build cache across your team's machines and CI) through their platform, free on the Hobby plan, included with Vercel Pro/Enterprise.

There's nothing to host. It's a CLI tool in your repo. `npx turbo init` in an existing monorepo and you're started. Configuration is a single `turbo.json` file. The learning curve is gentle if you already understand your dependency graph. Solo developers: the local caching alone saves time on rebuilds. Small teams: remote caching is where the magic happens. One person builds, everyone benefits. Large teams: Turborepo or Nx. Those are your two real options.

The catch: Turborepo is simpler than Nx but also less powerful. If you need code generation, dependency graph visualization, or affected-project detection beyond builds, Nx does more. Turborepo does less, but what it does, it does with almost zero config.