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Kotlin vs .NET: catalog facts
Kotlin	.NET
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	Cross-platform on Windows, Linux and macOS Covers web, desktop, mobile, cloud and games
Best tooling experience is tied to JetBrains IDEs Multiplatform setups add build complexity	Parts of the wider ecosystem lean towards Microsoft tools and Azure Large install compared with lighter language runtimes
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: MIT
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.