Below are some of the list of customization.
1) API integration with 3rd Party CRM
2) Email / SMS module in Vicidial
3) Security in Vicidial so that Phone Numbers are not visible to Agent & Manager
4) Reports Customization
5) Whisper feature add for call bargin
Consultation for below points:
1) Deploy vicidial with more than 500 seats
2) Multi Server setup of vicidial where DB, Web and Asterisk Servers are different
1 Gig = 30 minute of Development
Note: KINDLY CONSULT VIA MESSAGE BEFORE YOU BUY GIG.