Create visualisation in Kibana 6.5 for web analytics

I want to create an interactive funnel visualisation & calculate percentage uplift of users between two selected Ad campaigns.

How to achieve this in Kibana? Canvas funnel is not interactive. Percentage metric exists - but for older version (6.4) and the campaigns cannot be dynamically selected in it.

Right now you cannot create a funnel visualization in Kibana. Your best bet would be to use Vega to create it and then you can customize it to your needs.