[devonkim]

I believe the primary difference can be summarized in two words - data analytics. Twitter has a ton more analytics options for its users than WhatsApp appears to have mostly because, like Google, Twitter is more of an advertising platform than a utility platform as far as its actual business model goes. WhatsApp is potentially b2c as a business while I'd argue Twitter is really b2b. My experience with enterprise businesses makes it hard for me to believe that going b2b is actually efficient as much as it is about revenue assurance and scaling for sales / marketing culture organizations.