Ranked in these QuestionsQuestion Ranking
Pro Open source
KairoDB is licensed under Apache License with source code available on GitHub.
Pro Apache Cassandra provides fast, efficient, and highly reliable storage
KairosDB primary storage backend is Apache Cassandra. Cassandra is one of the biggest player in NoSQL world, supported by Datastax and used by large companies such as Netflix.
Pro High modularity
Extending KairosDB is very easy.
Software is based on Guice modules and all parts can be extended using modules: aggregations, query engines, webservice APIs.
Pro Multi apis
Accessible through Rest, Telnet, and Graphite.