A few months back we added a new feature to the heart of our security ratings portal: the ability for users to not only filter companies in their portfolios, but also to see real-time updated counts of how many "filtered" companies match their selected filter criteria. In practice, this allows users to quickly see, for example, all of their vendors in the Technology or Finance industry with an IP footprint in the U.K or Germany that use Amazon or Google as service providers.

Article Link: https://www.bitsighttech.com/blog/filtering-is-easy-counting-is-hard