# Zapfast (open-source chat app)

> Zapfast is a free, open-source chat app for Windows, macOS and Linux. ZapFast: a fast, native WhatsApp client in Rust and egui. It has 1,692 GitHub stars and is released under the MIT license. Its source code is on GitHub at crmne/zapfast.

WhatsApp, native and fast. ZapFast is a WhatsApp client for Linux, macOS, and Windows, written in Rust with egui and whatsapp-rust. It links to your phone as a companion device and has no browser engine. In our Linux test it opens in under a second and uses about 200 MB of idle RAM, against 1.13 GB for WhatsApp Web. See the measurements.

## Key facts

| Fact | Value |
|---|---|
| Repository | https://github.com/crmne/zapfast |
| Platforms | Linux, macOS, Windows |
| Interface | desktop GUI |
| GitHub stars | 1,692 |
| License | MIT (open source) |
| Replaces | n/a |
| Language | Rust |
| Website | https://zapfast.rocks |
| Official | no |
| Category | Chat & communication |
| Latest release | v0.19.0 (Oct 3, 2026) |
| Last commit | Oct 6, 2026 |

## Install

### Homebrew (macOS)

```sh
brew install --cask crmne
```

Package page: https://formulae.brew.sh/cask/crmne

### AUR (Arch Linux)

Package page: https://aur.archlinux.org/packages/zapfast-bin

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