WhatsApp vs Email Marketing: Open Rates, Costs & ROI Compared

Email marketing has been the default for two decades, but WhatsApp is rapidly becoming the preferred channel for businesses that want their messages actually read. Here is how the two channels compare on the metrics that matter.

The Numbers at a Glance

Sources: Mailchimp industry benchmarks 2025, WhatsApp Business case studies, industry reports from Gupshup and Infobip.

When to Use WhatsApp

WhatsApp excels for time-sensitive, high-value messages where you need the customer to actually read and respond:

• Appointment reminders -- "Your appointment is tomorrow at 3 PM. Reply CONFIRM or RESCHEDULE."
• Order updates -- "Your order #4521 has shipped. Track it here."
• Payment collection -- "Your invoice of ₹2,500 is due. Pay now: [link]"
• Lead follow-up -- "Hi Priya, thanks for your inquiry about our yoga classes. Here are our available slots..."
• Personalized offers -- targeted promotions based on purchase history or CRM stage

When to Use Email

Email still wins for certain use cases:

• Long-form content -- newsletters, product announcements, educational content
• Large audience blasts -- when per-message cost matters more than open rates
• Formal communication -- contracts, detailed proposals, legal notices
• Search and archive -- customers can easily search old emails; WhatsApp history is harder to navigate

The Best Strategy: Use Both

The highest-performing businesses do not choose between WhatsApp and email -- they use both strategically. Email for content and archival. WhatsApp for action and engagement. The key is matching the channel to the message.

A gym might send a monthly newsletter via email but use WhatsApp for class reminders, payment links, and re-engagement. A car dealership might email a new model brochure but WhatsApp the test drive confirmation.