ArangoDB vs Riak: What are the differences?
ArangoDB: A distributed open-source database with a flexible data model for documents, graphs, and key-values. A distributed free and open-source database with a flexible data model for documents, graphs, and key-values. Build high performance applications using a convenient SQL-like query language or JavaScript extensions; Riak: A distributed, decentralized data storage system. Riak is a distributed database designed to deliver maximum data availability by distributing data across multiple servers. As long as your client can reach one Riak server, it should be able to write data. In most failure scenarios, the data you want to read should be available, although it may not be the most up-to-date version of that data.
ArangoDB and Riak can be categorized as "Databases" tools.
"Grahps and documents in one DB" is the primary reason why developers consider ArangoDB over the competitors, whereas "High Performance " was stated as the key factor in picking Riak.
ArangoDB and Riak are both open source tools. It seems that ArangoDB with 8.22K GitHub stars and 576 forks on GitHub has more adoption than Riak with 3.24K GitHub stars and 530 GitHub forks.
AresRPG, Stepsize, and Brainhub are some of the popular companies that use ArangoDB, whereas Riak is used by Sentry, Twilio SendGrid, and OpenX. ArangoDB has a broader approval, being mentioned in 11 company stacks & 15 developers stacks; compared to Riak, which is listed in 15 company stacks and 10 developer stacks.