Email and WhatsApp are both permission channels, and both can be done badly. The useful comparison is not which one has the higher open rate in somebody’s chart, but which fits the message you want to send, the consent you have and the way your customers already behave. This guide compares the two on the things you can actually check.
Read alongside this guide: WhatsApp marketing software and Waki plans and pricing.
Key takeaways
- WhatsApp has stricter, platform-enforced consent rules than email.
- Email publishes; WhatsApp converses. Choose by the message, not by the channel.
- WhatsApp costs more per message and is used selectively; budget by use case.
- Compare channels on actions taken, not on open rates.
Consent and the rules
Email needs an address collected with permission and an unsubscribe link in every message, and the rules are enforced mostly by spam filters and complaints. WhatsApp needs an explicit opt-in, a Meta-approved template for every message that starts a conversation, and a working opt-out; Meta enforces this through the quality rating on your number. WhatsApp’s rules are stricter and the consequences for breaking them arrive faster.
Message format
Email is long-form: layout, several images, several links, attachments. It suits newsletters, detailed offers and documents people file. A WhatsApp message is short, carries one image or document and up to a few buttons, and is read on a phone in seconds. It suits a reminder, a confirmation or one offer with one action.
Replies and conversation
An email reply lands in a shared mailbox and is answered later. A WhatsApp reply is immediate and opens a 24-hour customer-service window in which your team or your automation can continue the conversation freely. If you want a dialogue, WhatsApp is built for it; if you want to publish, email is.
Cost model
Email platforms charge a subscription that grows with list size; sending one more email costs almost nothing. WhatsApp has a platform subscription plus Meta’s conversation charges, which are priced per conversation and category rather than per message and are billed separately from the plan. Expect WhatsApp to cost more per message and to be used more selectively.
Measurement
Email opens have become unreliable because of image blocking and privacy proxies; clicks and unsubscribes are the honest signals. WhatsApp reports delivered, read (when the recipient has receipts on), replied, clicks on tracked links and opt-outs. In both cases the number that matters is how many people did what the message asked.
When to use which
Most businesses need both and should send different things on each.
- Email for newsletters, long updates, invoices and anything people want to keep.
- WhatsApp for time-sensitive, personal, action-oriented messages and for conversations.
- Both together when a short WhatsApp nudge points to a longer email or web page.
- Neither for people who did not opt in to that channel.
Next steps
Conclusion
Email and WhatsApp are not rivals so much as different rooms. Put the long, keepable content in one and the short, timely, conversational messages in the other, collect consent for each, and judge both by what customers do next.