Kibana customization

Hi all.
My customer wanted to have alternative web interface for logstash/elasticsearch. At first glance, kibana does not allow customize yourself as I want. Anyway dashboard/visualizator not what I need. So far I see only one option: a website + elasticsearch api to fill web site. But may be there is better solution - please tell me....
Best regards, Roman.

What kind of customization did you have in mind?