TrailDB vs ZeroDB: What are the differences?

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.

What is ZeroDB? Moving on-premise databases to the cloud, cheaply and securely. ZeroDB enables clients to run queries over encrypted databases without exposing decrypted data to the server and without a proxy gateway. Data at rest and in use is secure - the cloud is no longer a single point of failure.

TrailDB and ZeroDB can be primarily classified as "Databases" tools.

TrailDB and ZeroDB are both open source tools. It seems that ZeroDB with 1.58K GitHub stars and 99 forks on GitHub has more adoption than TrailDB with 962 GitHub stars and 64 GitHub forks.