Email still does the heavy lifting in retention marketing, but it's no longer working alone. WhatsApp open rates dwarf anything email can manage, and when the two channels are built to work together rather than compete, the results compound. This talk breaks down how to combine email's depth with WhatsApp's conversational immediacy across the full customer lifecycle, from welcome to winback, so each channel does what it does best. Expect practical flow structures, real examples of what to send where, and a framework for deciding which message belongs on which channel, without annoying your subscribers into unsubscribing from both.