Talking about the best, I think the analytics feature is the most valuable. Out-of-box data insights integrated with big-data analytics and ML services like Cloud Dataflow, Cloud Bigtable, etc., are best for real-time analysis when connected through a custom pipeline. Review collected by and hosted on G2.com.

Mainly we should be cautious about data breaches. If there is any bug within it, there are chances that our and our subscribers' data can be accessed. It can be improved if more security features like two-factor authentication are included. Review collected by and hosted on G2.com.