In our Java benchmarks, Fory is actually faster than FlatBuffers — you can try it yourself here: https://github.com/apache/fory/blob/main/java/benchmark/src/...

We haven’t tested FlatBuffers vs. Fory for Rust yet, but we plan to.

It’s also worth noting the focus is a bit different: FlatBuffers is great for certain constrained scenarios (e.g., games, embedded), while Fory is a more general‑purpose serialization framework with features like cross‑language object graph support, circular reference handling, and schema evolution.