KairosDB vs TrailDB: What are the differences?
What is KairosDB? Fast Time Series Database on Cassandra. KairosDB is a fast distributed scalable time series database written on top of Cassandra.
What is TrailDB? An efficient tool for storing and querying series of events, by AdRoll. TrailDB's secret sauce is data compression. It leverages predictability of time-based data to compress your data to a fraction of its original size. In contrast to traditional compression, you can query the encoded data directly, decompressing only the parts you need.
KairosDB and TrailDB belong to "Databases" category of the tech stack.
KairosDB and TrailDB are both open source tools. KairosDB with 1.46K GitHub stars and 302 forks on GitHub appears to be more popular than TrailDB with 962 GitHub stars and 64 GitHub forks.