ArangoDB vs FoundationDB

ArangoDB is an open-source multi-model database that combines document, graph, and key-value data models in a single engine. It uses AQL (ArangoDB Query Language) for querying across all data models and supports distributed deployments.

FoundationDB is a databases tool that distributed key-value store from apple providing acid transactions across a scalable, fault-tolerant cluster. It is open source software.