WhatsApp marketing for restaurants: the playbook that actually converts

India has 535 million WhatsApp users. The open rate for a WhatsApp message is 98%. The open rate for a restaurant email newsletter is around 22%. If your restaurant's marketing plan is an Instagram post every two weeks and a biryani special email that nobody opens, you are leaving an entire channel unused.

Building the list

The list-building trigger is the payment. When a guest pays at table via UPI or scans to order, collect the phone number with a simple opt-in: 'Would you like specials and updates via WhatsApp? (Optional)' At checkout. The opt-in rate on a genuine question after a good meal is 60–70%. At the dine-in bill, put a QR code that links to a WhatsApp Business greeting.

Segmentation

• New guests (visited once in last 30 days) — send a 'thank you + here's what else we do' message.
• Regulars (3+ visits in 90 days) — send early access to seasonal menus and events.
• Lapsed (visited 61–90 days ago, nothing since) — send a win-back offer.
• VIPs (top 10% by spend) — send a personal message from the owner.

What to send

The messages that convert: new menu launches ('Our winter menu is here — 6 new dishes, starting this Friday. Reserve your table'), time-sensitive offers ('Today only: complimentary dessert with any main ordered before 7:30pm'), and event invites ('Live music + dinner this Saturday — 12 seats left'). The messages that get blocked: generic 'discount off everything' blasts, overly frequent messages, and anything that does not feel like it was written for the recipient.

Timing

Best-performing message times for restaurant WhatsApp: 11:30am–12:30pm (pre-lunch decision window) and 5:30pm–6:30pm (pre-dinner planning). Never send between 10pm and 9am. Never send more than 3 messages per month to any segment — the unsubscribe rate jumps sharply above that.

Opt-outs & spam

Every message should have a clean opt-out: 'Reply STOP to unsubscribe.' Remove opt-outs immediately from all lists. A guest who opts out and then gets another message is a guest who never comes back.

WhatsApp Business API

At scale (500+ active contacts), the WhatsApp Business API allows templated messages with quick-reply buttons, order confirmations, and automated reorder nudges. Indostra integrates with leading BSPs to trigger messages on loyalty events — third visit, post-payment survey, lapsed-guest win-back — automatically.