Is there a method of transferring files that is faster than rsync and less flaky than fpsync? [closed]

We have some cloud-based servers with many networking cards that can theoretically achieve extremely high speed file transfers. But with rsync, the transfers are not very fast, apparently because it only uses a single thread and a single card. I have found that fpsync can be much faster (more than 10x), but it has a much clunkier and less flexible interface and, more importantly, it often seems to just fail completely at some point. Are there any other alternatives to rsync that could be faster?