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Kotlin vs Swift: catalog facts
Kotlin	Swift
Free Free and open source.	Free Free and open source.
Windows, macOS, Linux, Command line	Windows, macOS, Linux, Command line
Null safety and concise syntax Targets JVM, Android, web and native through multiplatform	Compiles to native code with strong safety guarantees Toolchains for Linux, macOS and Windows
Best tooling experience is tied to JetBrains IDEs Multiplatform setups add build complexity	Much of the library ecosystem targets Apple platforms
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: Apache-2.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.