apple/swift-nio

Health v2 · maintenance only

Adoption not part of the score

8533 stars · 806 forks observed · 2026-10-07

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

SwiftNIO is a cross-platform, event-driven, non-blocking network application framework for Swift, similar to Netty, for building high-performance protocol servers and clients. It provides core abstractions like EventLoops and Channels, with ecosystem packages for TLS, HTTP/2, SSH, QUIC, and HTTP/3.

Use cases

• build a high-performance TCP server in Swift
• write a custom network protocol client
• implement a non-blocking HTTP server
• add TLS support to a Swift networking stack
• build protocol servers and clients on Apple platforms
• handle thousands of concurrent connections efficiently

When to choose

• you need low-level, high-performance non-blocking I/O in Swift
• you're building custom protocol implementations or servers
• you want a Netty-style framework in the Swift ecosystem
• you need cross-platform networking for Swift server-side or Apple platforms

When to avoid

• you just need a simple high-level HTTP client or server without performance tuning
• you're not developing in Swift
• you want batteries-included web framework features like routing and templating out of the box

Facets

framework · maturity stable

networking http-server websocket concurrency middleware networking backend developer-tools microservices cross-platform event-driven non-blocking-io netty-like protocol-servers async-io swift-server swift linux macos

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