April 2026 Swift Update: Valkey Client, Embedded Swift, and More

Welcome to the April 2026 edition of our Swift community roundup! This month brings a major new server-side library, exciting Embedded Swift talks from try! Swift Tokyo, and fresh video content to sharpen your concurrency and optionals skills. Dive into the questions below to explore the latest news, or use the internal links to jump straight to topics that interest you.

What is valkey-swift and why was it created?

Valkey-swift is a production-grade Swift client library for Valkey, a high-performance datastore commonly used as a caching layer or message broker. Valkey is an open-source fork of Redis created after Redis changed its licensing. The library was built from scratch to embrace Swift 6 and structured concurrency, making it a modern alternative to the older RediStack library. According to guest contributor Adam Fowler, retrofitting structured concurrency onto RediStack would have been awkward, and Valkey’s new license made a clean break the right time. Thus valkey-swift was born, targeting both Valkey servers and legacy Redis deployments. The client covers every standard Valkey command via auto-generated code from Valkey’s own specifications, ensuring long-term compatibility as the server evolves.

What makes valkey-swift production-grade?

Valkey-swift is designed to catch errors at compile time rather than in production. It uses Swift 6’s strict concurrency checking to eliminate data races, and all commands return typed responses checked at compile time. Connections and subscriptions are scoped through structured concurrency, so resources clean up automatically when a task ends. The library also supports every standard Valkey command, thanks to auto-generation from the server’s own command specifications. This ensures that as Valkey adds new features, the client stays in sync without manual effort. With these guarantees, valkey-swift is ready for high-throughput server environments.

How does valkey-swift compare to RediStack?

RediStack has long been the go-to Swift client for Redis, but it was built before Swift’s concurrency features existed. Retrofitting structured concurrency into RediStack would have been complex and would prevent adopting some of valkey-swift’s newer capabilities. Meanwhile, Redis shifted to a non-open-source license, encouraging the community to adopt the open-source fork Valkey. Valkey-swift was therefore created as a clean break, offering first-class concurrency, compile-time safety, and seamless migration from RediStack. The project provides a migration guide for RediStack users, along with comprehensive documentation. Developers who need a fast, reliable key-value store for server-side Swift should consider switching to valkey-swift.

What Embedded Swift talks were presented at try! Swift Tokyo 2026?

The try! Swift Tokyo 2026 conference featured two talks on Embedded Swift. The first, “Getting started with Embedded Swift,” is a short and accessible introduction. It shows how to write Swift using embedded simulators and includes code examples that run on devices like the Game Boy Advance! The second talk, “Learn by Building: Bare-Metal Programming with Embedded Swift,” goes deeper into the topic. It guides viewers through five bare-metal Raspberry Pi Pico examples, all available as sample code. Both talks are ideal for developers curious about running Swift on microcontrollers and embedded systems.

What other Swift learning resources were highlighted this month?

Beyond Embedded Swift, the community shared several valuable resources. A live online Q&A on Swift concurrency features engineers who designed and used Swift’s concurrency features—perfect for anyone wanting expert insights. Also, Nil Coalescing published a video titled “Advanced Techniques for Working with Optionals in Swift,” which covers lesser-known options for handling optionals. These resources complement the hands-on Embedded Swift talks and the new valkey-swift library, giving Swift developers plenty of ways to level up their skills in April 2026.

How can developers get started with valkey-swift?

Getting started is simple: add valkey-swift via Swift Package Manager to your project. The library works with both Valkey and Redis servers, so existing Redis users can migrate using the provided guide. Complete documentation is available on GitHub, and the project welcomes contributions. If you’re building server-side Swift and need a fast key-value store, valkey-swift offers a modern, safe, and performant solution. Check the project’s repository for installation instructions, API reference, and migration details.