Tauri vs Electron

Developers building desktop applications with web technologies face a decision that shapes everything from bundle size to security posture: Tauri or Electron. Both let you use HTML, CSS, and JavaScript for the UI. Both ship cross-platform applications for Windows, macOS, and Linux. The differences lie beneath the surface — in the rendering engine, the backend runtime, and the assumptions each framework makes about what a desktop app should carry with it.

How Tauri Works

Tauri pairs a web frontend with a Rust backend, then uses the operating system's built-in webview to render the UI (for a detailed breakdown of this architecture, see Tauri's Approach). It does not bundle a browser engine. When a user launches a Tauri app on macOS, it uses WKWebView. On Windows, it uses WebView2. On Linux, it uses WebKitGTK. These webviews are already present on the user's machine as part of the OS.

The Rust backend handles everything the webview cannot: file system access, system tray icons, native notifications, window management, and any CPU-intensive work. The frontend communicates with the Rust layer through an IPC system built around the invoke() function. A JavaScript call crosses the WebView boundary as serialized JSON, the Rust function executes, and the return value follows the same path back.

This architecture means Tauri apps ship as small binaries. A typical Tauri installer weighs between 3 and 10 MB. The runtime memory footprint at idle sits around 30 to 50 MB because there is no separate browser process to keep alive — just the Rust host and the system webview.

The Rust IPC Model

A Tauri command is a Rust function annotated with #[tauri::command]. It becomes callable from JavaScript with a single invoke() call — no preload scripts, no context bridge, no intermediate glue code.

// src-tauri/src/lib.rs
#[tauri::command]
fn process_data(input: String) -> String {
    // CPU-heavy work runs here, outside the webview thread
    format!("Processed: {}", input)
}

// Frontend (React, Vue, Svelte — any framework)
import { invoke } from '@tauri-apps/api/core';
const result = await invoke<string>('process_data', {
    input: 'raw-data'
});
console.log(result); // "Processed: raw-data"

The frontend code calls a named command with a payload object. The Tauri runtime serializes the arguments to JSON, routes the call to the matching Rust function, executes it, and serializes the return value back. There is no manual wiring between processes. For most operations, the serialization overhead is measured in microseconds. For high-frequency calls — thousands per second — batching operations into a single invoke() call reduces the crossing cost.

How Electron Works

Electron takes a different approach: it bundles everything the app needs into a single package (read more in Electron's Approach). Each Electron application ships with a full copy of Chromium and a Node.js runtime. When the app starts, it launches a main process (Node.js) that manages the application lifecycle and can spawn multiple renderer processes (Chromium) for each window.

The main process has full system access — file system operations, native menus, system tray, notifications, and spawning child processes. Renderer processes handle the UI and are sandboxed by default in modern Electron configurations. Communication between the two runs through Electron's IPC system, which uses ipcMain on the Node.js side and ipcRenderer (exposed via a preload script) on the UI side.

Because Chromium and Node.js are bundled, every Electron app behaves consistently across platforms. CSS renders identically on Windows, macOS, and Linux. JavaScript APIs work the same way everywhere. The tradeoff is size: a minimal Electron app produces an installer between 100 and 200 MB, and idle memory usage typically falls between 150 and 300 MB — the cost of keeping a browser runtime alive.

The Node.js IPC Model

Electron's IPC requires three pieces: a handler in the main process, a preload script that exposes a safe API to the renderer, and the renderer code that calls it.

// Main process (Node.js)
import { ipcMain } from 'electron';
ipcMain.handle('process-data', async (_event, input: string) => {
    return `Processed: ${input}`;
});

// Preload script — the secure bridge
import { contextBridge, ipcRenderer } from 'electron';
contextBridge.exposeInMainWorld('api', {
    processData: (input: string) => ipcRenderer.invoke('process-data', input)
});

// Renderer (UI)
const result = await window.api.processData('raw-data');
console.log(result); // "Processed: raw-data"

The Electron approach involves more moving parts, but each piece is visible and configurable. The preload script creates an explicit security boundary: the renderer only sees the methods you choose to expose. This flexibility is powerful, but it also means security depends on the developer configuring each piece correctly.

Comparison Table

For a full side-by-side feature comparison table, visit the dedicated Comparison Table section.

Architectural Comparison in Practice

The rendering engine choice creates a cascade of downstream differences. Electron's bundled Chromium means the app looks and behaves identically on every platform — the same CSS, the same JavaScript engine, the same DevTools. This consistency is valuable when you are building an IDE, a design tool, or any application where precise UI behavior matters. VS Code, Figma's desktop app, and Discord all depend on this predictability.

Tauri's system webview approach means the app inherits whatever browser engine the OS provides. On macOS and iOS, WKWebView is fast and standards-compliant. On Windows, WebView2 (based on Edge/Chromium) is similarly capable. On Linux, WebKitGTK can lag behind — CSS Grid support arrived later, some newer web APIs are missing, and font rendering differs from the other platforms. This is not a dealbreaker, but it is real. Applications that target Linux users specifically report spending meaningful time on cross-platform CSS fixes.

The backend language choice shapes what kind of work each framework excels at. Rust compiles to native code. For file parsing, image processing, encryption, or any CPU-bound task, a Tauri command written in Rust will complete faster than the equivalent Node.js code. Electron's Node.js backend, while slower for raw computation, gives you access to every package on npm — database drivers, authentication libraries, cloud SDKs, and millions of modules that have no Rust equivalent yet.

Security Models

The two frameworks approach security from opposite directions. Tauri starts with everything denied and requires you to explicitly grant permissions. Electron starts with access available and expects you to lock it down.

In Tauri v2, every sensitive capability — file system access, shell command execution, network requests, clipboard access — must be declared in a capabilities file. You scope file system access to specific directories. You list which shell commands the app can spawn. If a capability is not declared, the Rust backend refuses to execute it, even if the frontend code calls invoke() for it.

// Example Tauri capability declaration
{
  "permissions": [
    "fs:allow-read",
    "fs:allow-write",
    {
      "identifier": "fs:scope",
      "allow": [{ "path": "$APPDATA/**" }]
    }
  ]
}

This configuration grants the app permission to read and write files, but only within the application's data directory. The frontend cannot read from ~/Documents or write to system paths unless you explicitly add those scopes.

Electron's security relies on process isolation and correct configuration. The renderer process runs in a sandboxed environment. It cannot access Node.js APIs directly. Communication with the main process happens through the preload script, which acts as a controlled bridge. The main process has full system access and should validate every request from the renderer before acting on it.

Both models can be secure. The difference is in where the responsibility falls. Tauri's capability system makes it harder to accidentally expose dangerous functionality. Electron requires more discipline from the developer — forgetting to enable contextIsolation or leaving nodeIntegration on creates a genuine vulnerability.

When to Choose Tauri

For a decision framework on when to pick Tauri versus Electron, read When to Choose Tauri vs Electron.

Tauri is the stronger choice when the following conditions describe your project and team:

• Bundle size matters to your users. If your audience includes people on metered connections, slow internet, or machines with limited storage, a 5 MB download versus a 150 MB download changes whether they install the app at all.
• Performance under CPU load is a core requirement. File parsers, media encoders, cryptographic operations, data analysis — anything that saturates a CPU benefits from Rust's compiled performance.
• Memory efficiency is non-negotiable. System utilities, background tools, and always-on applications feel irresponsible at 300 MB of RAM. Tauri's 30–50 MB idle footprint makes always-running apps acceptable.
• Mobile is part of the roadmap. Tauri v2 supports iOS and Android from the same codebase. If you need desktop and mobile, Tauri provides that path. Electron does not support mobile at all.
• Your team is comfortable with Rust or willing to learn it. The Rust required for a basic Tauri app is modest — mostly function signatures and data serialization. But someone on the team needs to own it.
• Security posture is a selling point. Capability-based, deny-by-default security is a stronger foundation for privacy-focused or security-sensitive tools.

When to Choose Electron

Electron remains the better fit when these conditions apply:

• Your team is JavaScript and TypeScript only. Nobody on the team knows Rust, and the project timeline does not accommodate learning a new language with a famously steep learning curve.
• You depend on Node.js native libraries. If your app uses sharp for image processing, better-sqlite3 for local databases, or any package with C++ addons, Electron gives you direct access. Rewriting that logic in Rust for Tauri is possible but time-consuming.
• Cross-platform rendering consistency is critical. IDEs, design tools, rich text editors — anything where pixel-perfect layout matters across Windows, macOS, and Linux benefits from Electron's single rendering engine. Debugging a CSS layout bug that only appears on WebKitGTK is not how most teams want to spend a sprint.
• Rapid prototyping is the priority. The Electron ecosystem has starters, boilerplates, and community answers for nearly every problem. If you need an MVP in weeks and the team already knows the stack, Electron removes unknowns.
• You need access to the full npm ecosystem in the backend. Authentication libraries, cloud SDKs, ORMs, and API clients with Node.js bindings are available today. The Rust crate ecosystem is growing but has gaps.

The Tradeoff That Gets Overlooked

Most comparisons frame Tauri as "Electron but smaller" and Electron as "Tauri but heavier." That framing misses the real tradeoff: where you pay your complexity cost.

With Tauri, the complexity shows up in development. You maintain a Rust codebase alongside your frontend. You test CSS across three different rendering engines. You design an IPC boundary that keeps data flowing efficiently between Rust and JavaScript. These are solvable problems, but they take time.

With Electron, the complexity shows up at runtime. The user downloads a large package. The app consumes hundreds of megabytes of RAM before it displays a window. Cold starts take several seconds. These are not problems you solve — they are properties of the architecture that you accept.

Summary

Tauri and Electron represent two philosophies about what a desktop application built with web technologies should carry. Electron carries everything — a known browser engine, a known JavaScript runtime, and a decade of ecosystem growth. The cost is paid in megabytes and RAM. Tauri carries almost nothing — it relies on the operating system for rendering and a compiled Rust binary for backend logic. The cost is paid in development time and cross-platform testing.

If your team knows JavaScript and needs to ship a desktop app next month, Electron removes friction. If your product's value proposition includes being lightweight, secure, and efficient, and your team can invest in Rust, Tauri delivers those qualities in a way Electron structurally cannot.

The frontend code — React components, Vue templates, Svelte stores, CSS stylesheets — is portable between both. Starting with one does not lock you into it permanently, but switching later means rewriting the backend. The choice matters most at the start of a project, and it should be driven by what your users need from the application, not by which framework has the more enthusiastic community at the moment.