wasm-micro-runtime - designed mostly for IoT and hasn't AOT compilation yet, only interpreter wasmtime - based on Cranelift backend wasmerio - has three different backends - Cranelift, dynasm and LLVM JIT WAVM - only LLVM JIT backend
Starting today, experimental support for WebAssembly is available in V8 and Chromium behind a flag. To try it out in V8, run d8 version 5.1.117 or greater from the command line with the --expose_wasm.