Speaking of open source Datomic, check out mentat. It's not at all the same as an open source Datomic, because it's made for use on single devices not clusters,

Speaking of open source Datomic, check out mentat. It's not at all the same as an open source Datomic, because it's made for use on single devices not clusters, but it's inspired by Datomic so at the same time it is very much like Datomic. https://github.com/mozilla/mentat https://github.com/mozilla/mentat See also this blog post for some background and history: https://www.ncalexander.net/blog/2017/05/31/tofino-data-storage-and-how-we-got-to-mentat/ https://www.ncalexander.net/blog/2017/05/31/tofino-data-stor...