Rust vs Swift for desktop development: a practical comparison

I recently shipped a production desktop app written entirely in Rust using GPUI. Before committing to that stack, I spent time evaluating Swift as an alternative. Both languages claim memory safety. Both compile to native code. Both have strong corporate backing. But the actual experience of building desktop software in each is very different, and the right choice depends heavily on what you are building and who you are targeting.

This post is the comparison I wish I had when I was making that decision. I will focus on the things that actually matter when you are writing desktop apps: platform support, UI frameworks, memory safety models, build and distribution tooling, and the practical pain you will feel in each ecosystem.

Platform support and the elephant in the room

Swift runs on macOS, iOS, tvOS, and watchOS. Apple controls the language, the standard library, and the primary UI frameworks. You can technically run Swift on Linux and Windows through the Swift.org toolchain, and projects like SwiftUI for Windows exist as experiments. But in practice, Swift desktop development means macOS development.

Rust compiles to macOS, Windows, Linux, BSD, and more. The cross-compilation story is not perfect (linking against platform SDKs on Windows from a Linux host takes setup), but cargo build --target works for the common cases. If you need your desktop app to run on more than one OS, Rust starts with a real advantage.

This is not a minor point. If your users are all on Macs, Swift is the natural fit. If you need to ship to Windows users too, Rust saves you from maintaining a separate codebase or fighting with cross-platform Swift tooling that few people use in production.

UI frameworks: AppKit/SwiftUI vs the Rust ecosystem

Swift gives you access to AppKit and SwiftUI. SwiftUI has matured significantly since its introduction. Apple keeps expanding its capabilities, and for many common UI patterns (forms, lists, navigation, settings windows), you can build something polished quickly.

@main
struct MyApp: App {
    var body: some Scene {
        WindowGroup {
            ContentView()
        }
    }
}

The problem with SwiftUI is that it hits a complexity wall. Custom layouts, non-standard interactions, and anything Apple did not anticipate become progressively harder. When you need fine-grained control over rendering, you drop down to AppKit or even Core Animation, and that code is harder to write and maintain.

Rust has no single dominant UI framework. egui provides immediate-mode rendering that is great for tools and prototypes. iced implements the Elm architecture. GPUI (from the Zed editor team) gives you a retained-mode, GPU-accelerated UI framework that performs well for complex applications. Tauri and Dioxus let you use web technologies with a Rust backend.

fn render(&mut self, cx: &mut ViewContext<Self>) -> impl IntoElement {
    div()
        .flex()
        .flex_col()
        .p_4()
        .gap_2()
        .child(
            div()
                .text_sm()
                .text_color(cx.theme().muted)
                .child("Status")
        )
        .child(
            div()
                .text_xl()
                .font_weight(FontWeight::BOLD)
                .child("Connected")
        )
}

I picked GPUI for my project because it gives me the rendering performance and layout control I need without requiring a browser runtime. But the tradeoff is real: GPUI has a smaller community, fewer tutorials, and rougher edges than SwiftUI. You will read source code instead of documentation sometimes. For more on that decision, see my GPUI framework comparison.

Memory safety: borrow checker vs ARC

Both languages prevent use-after-free, buffer overflows, and most null pointer dereferences at compile time. But they do it differently, and the difference affects how you write code every day.

Rust uses ownership and borrowing. The compiler tracks which code owns each piece of data and when references are valid. This is strict. It rejects programs that would be safe at runtime but cannot be proven safe statically. You will fight the borrow checker early on, and you will learn to structure your code differently because of it.

Swift uses automatic reference counting (ARC) with optional explicit weak/unowned references. It is less strict than Rust’s model. Most code just works. You get retain cycles if you are careless with closures and delegates, and weak references can be nil when you do not expect it, but the day-to-day friction is lower than Rust.

// Rust: ownership is explicit
fn process(data: Vec<u8>) -> Vec<u8> {
    let mut result = data; // data moved here
    result.push(42);
    result
}

// Swift: ARC handles it
func process(_ data: Data) -> Data {
    var result = data // data is copied (COW) or retained
    result.append(42)
    return result
}

For desktop app code, where you are often shuttling UI state, event handlers, and callbacks around, Swift’s approach is easier to work with. Rust requires more architectural discipline. That discipline pays off in correctness, but it slows you down when you are prototyping.

The place where Rust’s safety model wins decisively is concurrent code. Rust’s Send and Sync traits give you compile-time guarantees that data races cannot happen. Swift has actor isolation and structured concurrency (introduced in Swift 5.5), which help, but the guarantees are weaker. If your desktop app does heavy background processing (image manipulation, data analysis, network handling), Rust’s concurrency safety is a genuine advantage.

Build tooling and distribution

Swift uses Xcode and the Swift Package Manager. Xcode is a capable IDE with good debugging, profiling, and interface building tools. It handles code signing, notarization, and App Store packaging. If you are distributing on the Mac App Store, the entire pipeline is integrated.

Rust uses Cargo. Cargo is excellent as a build tool and package manager. It handles dependencies, testing, benchmarking, and compilation profiles with minimal configuration. But there is no official Rust IDE experience comparable to Xcode. rust-analyzer in VS Code or Zed gets you most of the way there, but debugging and profiling require separate tool setup.

Distribution is where the gap widens. Apple’s notarization, signing, and App Store tooling are built into the development workflow. For Rust desktop apps, you need to handle each platform’s requirements manually: codesign and notarytool on macOS, MSIX or NSIS installers on Windows, AppImage or .deb on Linux. Tools like cargo-bundle and tauri-bundler help, but it is more work.

Ecosystem and library availability

Swift’s ecosystem is deep on Apple platforms and thin everywhere else. If you need CloudKit, Core Data, Metal, Vision framework, or any Apple API, Swift gives you first-class access. The CocoaPods and SPM ecosystems have thousands of Apple-platform libraries.

Rust’s ecosystem is broader but shallower in platform-specific areas. crates.io has over 150,000 crates covering networking, databases, parsing, cryptography, and more. For cross-platform concerns (HTTP, serialization, file I/O), Rust’s library quality is high. For platform-specific APIs, you will be writing FFI bindings or using crates that wrap native APIs, which adds maintenance burden.

Performance characteristics

Both languages compile to native code and perform similarly for most desktop workloads. Rust has an edge in predictable latency because it has no reference counting overhead and gives you control over allocation patterns. Swift’s ARC introduces retain/release calls that can cause micro-pauses in tight loops, though the compiler optimizes many of these away.

In practice, for a typical desktop app (UI rendering, file I/O, network calls, data processing), both languages are fast enough that raw performance is not the deciding factor. The more relevant metric is how much work the runtime does behind your back. Rust does less, which makes performance easier to reason about.

When to pick Swift

Choose Swift when:

• Your target platform is exclusively Apple (macOS, and maybe iOS)
• You want tight integration with Apple APIs and services
• You value faster prototyping over compile-time safety guarantees
• You plan to distribute through the Mac App Store
• Your team already knows Swift and Apple’s frameworks

When to pick Rust

Choose Rust when:

• You need to support Windows and Linux in addition to macOS
• Your app does significant concurrent processing where data race prevention matters
• You want a single codebase across all desktop platforms
• You need predictable performance with minimal runtime overhead
• Your team values compiler-enforced correctness and is willing to accept the learning curve

Both are good languages. The decision is not about which is better in the abstract. It is about which constraints matter more for your project: Apple ecosystem integration or cross-platform reach, faster iteration or stronger safety guarantees, integrated tooling or open flexibility.

What I ended up building

I chose Rust and built gpui-starter, a production-ready boilerplate for desktop apps using GPUI. It includes SQLite persistence, 21 themes with hot-reload, i18n support, form validation, a command palette, macOS tray integration, secure credential storage, undo/redo, auto-updating with Ed25519 signing, and accessibility support via AccessKit. If you are considering Rust for a desktop app and want a working starting point instead of starting from zero, check out the getting started guide and the repository.

The Rust desktop ecosystem is younger than Apple’s, and it shows. But it is growing fast, and for cross-platform desktop apps, I would make the same choice again.