95th billing and automation

hi there, i have asked about this in the past. What is the best tool out there to do 95th percentile billing. I have decided to use observium and librenms as result of responses but there seems to be some kind of billing module issue with these tools (thy are basically the same code). What are other systems besides observium and librenms (and old fashion cacti) people are using these days with 95th billing and integration with a CRM like salesforce/zoho, etc. I appreciate the responses. Mehmet