/electron-best-practices

Electron vs Tauri: Decision Matrix

Overview

Tauri is the primary alternative to Electron for building cross-platform desktop applications with web technologies. With Tauri 2.0 (released October 2024), the framework reached a significant milestone: mobile support (iOS and Android), a stabilized plugin system, and a refined security model. This reference provides a detailed comparison to help teams make an informed choice between the two frameworks.

Both frameworks allow you to build desktop applications using HTML, CSS, and JavaScript for the UI layer. The fundamental difference is in the backend: Electron runs a full Node.js runtime with a bundled Chromium browser, while Tauri uses Rust for the backend and delegates rendering to the operating system's native WebView.

Detailed Comparison

Bundle Size

Electron bundles a full Chromium browser and Node.js runtime with every application. This creates a baseline of roughly 80 MB before any application code is added. With dependencies and assets, production bundles typically land between 80-150 MB.

Tauri uses the operating system's built-in WebView (WebView2 on Windows, WebKit on macOS/Linux), so it does not ship a browser engine. The Rust backend compiles to a small native binary. Typical Tauri applications are 2.5-10 MB.

# Approximate bundle sizes for a simple "Hello World" app
Electron (macOS arm64):  ~85 MB
Electron (Windows x64):  ~90 MB
Electron (Linux x64):    ~95 MB

Tauri (macOS arm64):     ~3 MB
Tauri (Windows x64):     ~4 MB  (WebView2 runtime may add ~150 MB on first install)
Tauri (Linux x64):       ~5 MB

Note: On Windows, Tauri relies on WebView2, which is pre-installed on Windows 10 (version 1803+) and Windows 11. For older systems, the WebView2 runtime must be installed separately, adding to the effective first-install size.

Memory Usage

Electron's per-process architecture means each BrowserWindow runs its own Chromium renderer process, each consuming 50-100 MB. A single-window application typically uses 150-300 MB at idle.

Tauri's memory footprint is significantly smaller because it shares the OS WebView rather than running a dedicated browser instance. A comparable single-window Tauri application uses 30-40 MB at idle.

# Memory comparison for a typical single-window application
Electron:
  Main process:        ~50 MB
  Renderer process:    ~80 MB
  GPU process:         ~30 MB
  Total:              ~160 MB

Tauri:
  Rust backend:         ~8 MB
  WebView:             ~25 MB
  Total:               ~33 MB

For applications that open multiple windows, Electron's memory usage scales linearly (each window adds another renderer process), while Tauri's WebView windows share more resources with the OS.

Startup Time

Electron must initialize Chromium, the Node.js runtime, and load application code through the bundler output. Cold start times range from 1-3 seconds depending on application complexity and system hardware.

Tauri launches its native Rust binary and initializes the OS WebView, which is typically under 1 second. The WebView component is already loaded as part of the operating system, reducing initialization overhead.

Rendering Consistency

This is Electron's strongest advantage. Because Electron bundles Chromium, your application renders identically on Windows, macOS, and Linux. CSS features, JavaScript APIs, and rendering behavior are the same on every platform.

Tauri uses the system WebView, which means:

• macOS: WebKit (Safari engine) -- generally modern and capable
• Windows: WebView2 (Chromium-based Edge) -- close to Chrome behavior
• Linux: WebKitGTK -- can lag behind in feature support

This means you must test on all platforms and may need to avoid bleeding-edge CSS or JavaScript features that one WebView does not support. For pixel-perfect cross-platform UIs, this is a significant consideration.

/* Example: CSS that may behave differently across WebViews */
.container {
  /* backdrop-filter has inconsistent support in WebKitGTK */
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);  /* Required for WebKit */
}

Backend Language and Ecosystem

Electron's backend is JavaScript/TypeScript running in Node.js. This means full access to the npm ecosystem, seamless code sharing between frontend and backend, and a single language across the entire stack.

Tauri's backend is Rust. While powerful and performant, this requires the team to learn and maintain Rust code. The Rust ecosystem (crates.io) is smaller than npm but growing rapidly, especially for systems programming tasks.

// Tauri command example (Rust backend)
#[tauri::command]
fn read_file(path: String) -> Result<String, String> {
    std::fs::read_to_string(&path)
        .map_err(|e| e.to_string())
}

// Register in main
fn main() {
    tauri::Builder::default()
        .invoke_handler(tauri::generate_handler![read_file])
        .run(tauri::generate_context!())
        .expect("error while running tauri application");
}

// Tauri frontend invocation (TypeScript)
import { invoke } from '@tauri-apps/api/core';

const content = await invoke<string>('read_file', { path: '/tmp/data.txt' });

Compare with the equivalent Electron pattern:

// Electron main process (TypeScript/Node.js)
import { ipcMain } from 'electron';
import { readFile } from 'fs/promises';

ipcMain.handle('read-file', async (_event, path: string) => {
  return readFile(path, 'utf-8');
});

Mobile Support

Tauri 2.0 introduced mobile support for iOS and Android, allowing a single codebase to target desktop and mobile platforms. Mobile builds use the platform's native WebView (WKWebView on iOS, Android WebView on Android).

Electron has no mobile support and no plans to add it. If mobile is a requirement, Electron teams typically maintain a separate React Native or Flutter codebase, or ship a Progressive Web App alongside the desktop application.

Security Models

Electron uses process isolation: the main process (Node.js) is separated from renderer processes (Chromium) through IPC, with preload scripts acting as a controlled bridge via contextBridge.

Tauri uses a capability-based permission system. Each window or WebView is granted specific capabilities that define what system APIs it can access. This is configured declaratively in the Tauri configuration file.

// tauri.conf.json - Capability-based permissions
{
  "app": {
    "security": {
      "capabilities": [
        {
          "identifier": "main-window",
          "windows": ["main"],
          "permissions": [
            "fs:read",
            "fs:write",
            "dialog:open",
            "dialog:save"
          ]
        }
      ]
    }
  }
}

When to Choose Electron

Choose Electron when:

• Team is JavaScript/TypeScript only. Electron requires no additional language knowledge. The entire application is written in JS/TS.

• Consistent cross-platform rendering is essential. Applications that require pixel-perfect rendering across all platforms benefit from Electron's bundled Chromium. This is critical for design tools, rich text editors, and data visualization applications.

• You need specific Node.js packages or native modules. The npm ecosystem is vast. If your application depends on packages like better-sqlite3, sharp, or other native Node.js modules, Electron provides direct support.

• Extending an existing Electron codebase. Migration from Electron to Tauri is a significant undertaking. If the application is already working well in Electron, the cost of migration rarely justifies the benefits.

• Maximum ecosystem maturity is required. Electron has years of production battle-testing, extensive documentation, and established patterns for common desktop application needs (system tray, global shortcuts, auto-updates, crash reporting).

• Complex desktop-specific features. Electron's API surface for desktop integration (system tray, notifications, global shortcuts, protocol handlers, native menus) is comprehensive and well-documented.

When to Choose Tauri

Choose Tauri when:

• Bundle size is critical. Applications distributed through bandwidth-limited channels or to users with slow connections benefit enormously from Tauri's 2.5-10 MB bundles vs Electron's 80-150 MB.

• Memory efficiency matters. Deployment to resource-constrained environments (embedded systems, kiosks, older hardware) favors Tauri's smaller footprint.

• You need mobile support from a single codebase. Tauri 2.0's iOS and Android support allows shipping desktop and mobile from one project.

• Team has Rust experience or willingness to learn. Rust's performance and safety guarantees are valuable for compute-intensive backend operations.

• Performance-critical backend operations. File processing, data transformation, cryptography, and other CPU-intensive tasks run significantly faster in Rust than in Node.js.

• Startup speed is important. Applications that are launched frequently (utilities, quick-access tools) benefit from Tauri's sub-second startup.

Migration Considerations

Migrating from Electron to Tauri is non-trivial and involves:

1. Rewriting the backend in Rust. All main process logic (IPC handlers, file system access, system integration) must be reimplemented as Tauri commands.

2. Replacing Node.js dependencies. npm packages used in the main process must be replaced with Rust crate equivalents or Tauri plugins.

3. Adapting the frontend. Replace window.electronAPI calls with Tauri's invoke() API. The frontend framework (React, Vue, etc.) can remain the same.

4. Testing across WebViews. CSS and JavaScript that worked identically in Chromium may behave differently across OS WebViews.

5. Updating CI/CD pipelines. Build infrastructure must support Rust compilation and Tauri's packaging toolchain.

A phased migration is generally not practical -- the backend rewrite requires a full cutover. Consider running Electron and Tauri versions in parallel during a transition period if needed.

Team Skill Requirements

For teams already proficient in JavaScript/TypeScript with no Rust experience, adopting Tauri adds 2-4 months of learning time before the team is productive with the backend. Consider this ramp-up period when planning timelines.

See Also

• electron-vite Configuration -- Build tooling for Electron projects using Vite
• Electron Forge -- Packaging and distribution for Electron applications