"After booking, a WhatsApp needs to be sent" is the single most common request we hear from businesses setting up AI voice calls. And it makes sense: a phone call is good at getting a decision (yes, I'll come on Saturday; yes, confirm my order; I'll pay on Friday) but bad at delivering details. WhatsApp is the opposite. Combined, the call gets the answer and WhatsApp carries the date, address, link or form. On Edesy, the voice agent can send WhatsApp or SMS messages during the call or after it.
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Why voice and WhatsApp work together
| Voice call | ||
|---|---|---|
| Gets a decision | Strong | Weak (people read and don't reply) |
| Delivers details | Weak (people forget) | Strong |
| Links, maps, documents | No | Yes |
| Reaches people who ignore messages | Yes | No |
Common flows
Appointment or site visit. Call: book the slot → WhatsApp: date, time, address, map pin → call the day before: reminder. See book property site visits with AI calls.
Payment reminder. Call: "can you pay by Friday?" → WhatsApp or SMS during the call: payment link. See trigger payment reminder calls from your app.
Collect details without reading them over the phone. Call: qualify interest → WhatsApp: ask for the postal address or documents. A publisher we work with never asks teachers for an address on the call; WhatsApp collects it. See how a publisher reaches teachers with AI calls.
Sales handoff. Call: qualify the lead → WhatsApp: "Our sales manager will call you today" + brochure.
Unanswered call. No answer after retries → WhatsApp: the same information, with a reply button or callback number.
Writing the WhatsApp templates
- One template per step (booking confirmation, payment link, address request, callback notice).
- Keep it short: the key facts, one link, one action.
- Use the same variables as the call: name, date, time, amount, place.
- Get templates approved on the WhatsApp Business Platform before launch.
Example booking confirmation:
Namaste {{name}} ji, aapki {{service}} appointment {{date}} ko {{time}} baje confirm hai. Address: {{address}}. Location: {{map_link}}. Reschedule karne ke liye reply karein.
Timing
- During the call for things needed now: payment links, a form to fill while talking.
- Right after the call for confirmations and details.
- Before the appointment as a reminder, alongside or instead of a reminder call.
Costs
- Voice: on Edesy, Rs 4-6 per started minute depending on your prepaid top-up, with unanswered calls free.
- WhatsApp: Meta's per-message charges for the template category you use.
For a single AI agent across phone, WhatsApp calls and your website, see one AI agent for phone, WhatsApp and website.
Try it
Create a free account, build a booking agent, and add a WhatsApp confirmation step after the call. Need help getting WhatsApp templates approved? Talk to us.