Atuin* also allows for opt-in sync, easily hosting your own server, and switching search context for your shell history (ie whether you want to search the current directory, session, host, or all history on all hosts). We also have a bunch of different search modes that query history differently (fuzzy, prefix, etc)
But otherwise yes, the tools are pretty similar! Nice to see another in the space
*: context, I'm the maintainer so may be biased ;)
Ah, I hadn't come across Atuin before! They're pretty similar, but I think one significant advantage of hiSHtory is the "Custom Columns" support where you can populate custom columns with the output of an arbitrary shell script. For example, you can use this to collect the current git branch as an additional column.
[0]: https://atuin.sh/