Rolldown vs Rollup
No leader: the top candidate Rollup has only 0.28 confidence (low), below the 0.35 needed to declare a winner. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.
Capabilities
Feature-by-feature on the axes that matter for bundlers. “-” means undocumented, not absent.
What each one is
The product in its own terms, so the numbers below have context.
Rolldown
A JavaScript/TypeScript bundler combining Rollup-compatible APIs with esbuild feature parity, designed as the standard bundler for Vite. Free and open-source software built and maintained by a core team with community contributions.
Rollup
A module bundler that combines JavaScript files and compiles them using ES module format, supporting output to multiple formats (ES modules, CommonJS, UMD, SystemJS) and optimizing code size through tree-shaking to run efficiently in various environments including browsers and Node.js.
Pricing
List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.
Platform & deployment
Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.
Integrations
What each product connects to. Counts come from the vendor's own integration directory where one exists.
- Vite
Rolldown
- Rollup
- esbuild
- napi-rs
- GitHub
Rollup
- WMR
Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.