Volt

Judgement

What it is

Developer tool

What it does

A frontend build tool for Elixir and Phoenix projects with a dev server, hot module replacement and production builds for JavaScript, TypeScript, Vue single-file components and CSS. It replaces esbuild, the Tailwind CLI and Node.js with Rust-based components running inside the BEAM.

Adopt it when

You build Phoenix apps and want one Elixir dependency for frontend tooling instead of separate esbuild and Tailwind binaries or a Node.js install.

Watch out

It only fits the Elixir ecosystem, needs Elixir 1.18 and OTP 27, and is at version 0.23 with a young plugin and loader surface compared with Vite.

Ready for

Usable

Runs as

Command line and library

Built with

Elixir, Rust, OXC, LightningCSS and TypeScript

How established

Young: started 7 months ago, latest release v0.23.0.

What the license allows

You can build it into a product you sell, as long as you keep its copyright notice.

Judged on 2026-11-06 from the project's README and GitHub data. The license and age lines are worked out directly.

Built from

Follow it down: Volt → Elixir → OTP → GCC → LLVM project → runs on a microchip

How compilers were built, back to punched paper tape

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