JavaScript vs Kotlin: Rating, Votes and Features
- License: JavaScript — Open standard; Kotlin — Apache-2.0.
- Paradigms: JavaScript — Functional, Object-oriented, Procedural; Kotlin — Functional, Object-oriented.
- Typing: JavaScript — Dynamic; Kotlin — Static.
JavaScript — November 2026: 4 votes, rating 6.3/10.
Kotlin — November 2026: 3 votes, rating 7.4/10.
| JavaScript | Kotlin | |
|---|---|---|
| Category | programming language | programming language |
| Developer | Ecma TC39 | JetBrains |
| Created by | Brendan Eich | Andrey Breslav |
| First release | 1995 | 2011 |
| License | Open standard | Apache-2.0 |
| Open source | Yes | Yes |
| Pricing | Free | Free |
| Website | https://tc39.es | https://kotlinlang.org |
| Paradigms | Functional, Object-oriented, Procedural | Functional, Object-oriented |
| Typing | Dynamic | Static |
| Type strength | Weak | Strong |
| Type inference | No | Yes |
| Memory management | Garbage collected | Garbage collected |
| Runs as | Interpreted | Bytecode on a virtual machine |
| Main implementation | V8, SpiderMonkey, JavaScriptCore (JIT compiled) | Kotlin/JVM, also Native and JS |
| Concurrency | Event loop, async/await, workers | Coroutines |
| Null safety | No | Yes |
| Package manager | npm | Gradle, Maven |
| Used for | Back end, Desktop, Mobile, Web front end | Back end, Mobile |
| Specification | ECMA-262 | Kotlin Language Specification |