Clojure beyond the JVM — native binaries, WebAssembly, instant startup.

We build independent language runtimes in Zig — from-scratch implementations focused on fast startup, small binaries, and deep WebAssembly integration.

A full-scratch Clojure implementation. No JVM, no transpilation.

• ~4 ms startup / ~4 MB binary (single executable)
• 1,130+ vars across 30+ namespaces (651/706 clojure.core)
• Dual backend: bytecode VM (with ARM64 JIT) + TreeWalk interpreter
• deps.edn compatible (git deps, local deps, aliases)
• nREPL server with CIDER support
• cljw build app.clj -o app — standalone binary, no runtime needed

A fast, spec-compliant WebAssembly runtime.

• Full Wasm 3.0 support (all 9 proposals including GC, SIMD, exception handling)
• 523 opcodes (236 core + 256 SIMD + 31 GC)
• Register IR with ARM64 / x86_64 JIT
• Wins 14/23 benchmarks vs wasmtime, with ~43x smaller binary
• WASI support (file I/O, clock, random, args, environ)

A ClojureScript-to-JavaScript compiler. Early stage.

• Try it: zig build && ./zig-out/bin/cljw -e '(println "hello")'
• Report issues on each project's repository
• Sponsor development

_{ClojureWasm: EPL-1.0 / zwasm: MIT}