https://docs.datomic.com/on-prem/query/query.html#why-datalo...
(Some ten years ago worked at a startup that used Datomic. It seemed to work great, although the only queries I ever needed to add to the system were simple copy-paste hacks of existing ones, so I never got to dive into Datalog.)
datahike would be the closest to datomic in terms of features/implementation (support for as-of, transactor etc).
Then in terms of maturity I think the choice is between xtdb and datascript, both are very solid/maintained but they are also vastly different.
https://docs.datomic.com/on-prem/query/query.html#why-datalo...
(Some ten years ago worked at a startup that used Datomic. It seemed to work great, although the only queries I ever needed to add to the system were simple copy-paste hacks of existing ones, so I never got to dive into Datalog.)