As per the functionalities of a basic CRM , Leadsquared's CRM was used for the same purpose:-

1. Calling Leads 
2. API integrations through Google Ads and Facebook Ads 
3. Landing page and website integration
4. Converse facility , for chatting directly through WhatsApp with leads 
5. Tagging calls , accessing call recordings etc. due to integrations with Telephony 

The entire lifecycle of the CRM , from Requirement Gathering , to integrations, to monitoring the platforms and user access, was completely monitored and managed single handedly by me