Why We Shipped Our Desktop App with Tauri 2.0 Instead of Electron — 12MB vs 180MB Installer

TL;DR: Tauri 2.0 delivered a 12MB .msi/.dmg (vs 180MB Electron), 40MB idle RAM (vs 120MB), and true native menus/tray — but Rust backend logic added 3 weeks dev time, WebView2 on Windows has focus/IME bugs, and the plugin ecosystem is 5% of Electron’s. Full comparison →

The Context

Two-dev team building a desktop companion for our SaaS (real-time collaboration, local file watch, system tray, auto-updater). Electron 28 + React 18 + Vite was prototype. Pain points: 180MB installer, 120MB RAM idle, code-signing notarization failures on macOS, autoUpdater flakiness on Windows. Evaluated Tauri 2.0 (stable June 2026) vs Electron 30.

What We Tested

Tool	Use Case	Verdict	Why
Tauri 2.0 (Rust + WebView2/WebKit)	Production desktop app (v1.0 ship)	✅	12MB installer, 40MB RAM, native tray/menus, sidecar binaries for local CLI
Electron 30 + Vite	Same app, rebuilt	⚠️	180MB installer, 120MB RAM, mature plugins, but same notarization pain
Tauri 1.x	Earlier prototype (2025)	❌	No mobile, limited WebView2, plugin system immature
Wails (Go + WebView)	Go-team alternative	⚠️	Similar size wins, but Go backend vs our Rust preference; smaller ecosystem

The Pivot Point

April 2026: Electron autoUpdater failed silently on Windows 11 24H2 — users stuck on v0.9 for 3 weeks. Tauri 2.0 RC included tauri-plugin-updater with built-in signature verification, delta updates, and GitHub Releases integration. Tested Tauri 2.0 RC: built .msi (12MB), .dmg (14MB), .AppImage (16MB). Cold start: 800ms (Electron: 2.1s). Idle RAM: 40MB (Electron: 120MB). System tray: native tauri-plugin-tray-icon — no electron-tray-window hacks. Blocker: WebView2 on Windows — focus event fires twice, IME composition broken for CJK input. Workaround: tao event loop patch + custom IME handler (2 days). Shipped v1.0 June 10.

What We Use Now

Tauri 2.0 (stable) for production desktop:

• Frontend: React 18 + Vite + TypeScript (same as web)
• Backend: Rust 2021 edition, tauri::Manager, tauri_plugin_updater, tauri_plugin_tray_icon, tauri_plugin_fs (scoped), tauri_plugin_shell (sidecar)
• Sidecar: Bundled local CLI (Rust) for file watch/index — tauri::api::process::Command::new_sidecar("indexer")
• Build: tauri build --target universal-apple-darwin --target x86_64-pc-windows-msvc
• Signing: tauri build --sign with Apple Developer ID + Windows EV cert (GitHub Actions)

tauri-plugin-updater for auto-updates:

• Config: updater: {active: true, endpoints: ["https://releases.ourdomain.com/{{target}}/{{current_version}}"], pubkey: "..."}
• Delta updates: .msi patches ~2MB vs full 12MB
• Channel: stable / beta via GitHub Releases tags

When You’d Choose Differently

• Electron if: team lacks Rust experience, need mature plugin ecosystem (3000+ vs Tauri’s ~150), rely on electron-builder advanced configs, or need Chrome Extension support (Tauri: none).
• Wails (Go) if: team knows Go, want similar size/performance, don’t need mobile (Tauri 2.0 has iOS/Android alpha).
• Flutter Desktop if: single codebase for mobile+desktop+web, Dart team, can accept larger binary (~20MB) and non-native feel.

Tool Crucible Rating

Dimension	Rating (1–5)	Notes
Overall	4	Size/performance/security wins; Rust tax + WebView2 quirks prevent 5
Ease of Use	2	Rust learning curve (3 weeks); frontend DX same as web; debugging Rust+JS mixed is hard
Value	5	Free, MIT, no runtime licensing, smaller updates = lower CDN costs
Support	3	Active Discord, but Windows WebView2 bugs depend on Microsoft; plugin gaps

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This is part of our Desktop App Framework series. See full comparison: Tauri 2.0 vs Electron 30 vs Wails: Shipping Production Desktop Apps in 2026