Paxos from the ground-up to offer strong transactional guarantees, similar to CockroachDB: <a href="http:&#x2F;&#x2F;www.cockroachlabs.com&#x2F;blog&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.cockroachlabs.com&#x2F;blog&#x2F;</a>
CockroachDB is a KV store (that will be released with a SQL layer on top of it) whereas GoshawkDB is a Graph store. GoshawkDB puts data into client caches (much like Datomic) and even attempts transactions there.