New WhatsApp by Notify.lk
Add WhatsApp to your Notify.lk messaging
Send OTPs, order updates and reminders on WhatsApp through an API that’s as simple as the one you use for SMS. Keep SMS for promotions and for customers who aren’t on WhatsApp.
WhatsApp OTPs and alerts cost less in Sri Lanka from 1 October 2026. Meta is giving Sri Lankan numbers their own, lower rates for authentication and utility messages. See Meta’s pricing
Hi Nimal, your order #1234 is on its way 📦 It should reach you by Thursday.
482913 is your verification code. For your security, do not share this code.
Thanks! Can I change the delivery address?
SMS or WhatsApp? Use each one for what it does best
WhatsApp isn’t a replacement for SMS. It’s a better channel for some messages and a worse one for others. Here’s how we see it.
| SMS through Notify.lk | WhatsApp by Notify.lk | |
|---|---|---|
| Best for | Promotions, bulk campaigns and customers without WhatsApp | OTPs, order and delivery alerts, reminders and conversations |
| Reaches | Any mobile phone, no data needed | Phones with WhatsApp installed |
| Shows as | Your Sender ID | Your approved business name, logo and profile |
| Buttons | No | Confirm, Cancel, Track order and more |
| Photos and PDFs | Text only | A photo, video or PDF with the message, such as a product photo or an invoice |
| Receipts | Delivery reports | Delivery and read receipts |
| Replies | Customers can’t reply to a Sender ID | Customers reply, and you answer from the inbox |
| Cost | Rs. 0.40 – 1.10 per SMS plus taxes, depending on your plan | A monthly plan, plus Meta’s fee for each message |
Keep promotions on SMS
A marketing message on WhatsApp costs far more than a promotional SMS through Notify.lk. If you mostly send offers and campaigns, SMS is still the better deal.
Best of both Coming soon
Send on WhatsApp first and fall back to SMS automatically when a message can’t be delivered, through your own Notify.lk account.
What WhatsApp adds to your important messages
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Your business name, not a number
Messages arrive from your business profile, with your name and logo, so customers know who is writing.
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Buttons customers can tap
Add Confirm, Cancel, Track order or Copy code buttons, so customers don’t have to type a reply.
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Delivered and read
See when each message is delivered and when it’s read, in the dashboard or through webhooks to your system.
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Customers can reply
When someone answers your alert, the reply lands in a shared inbox where your team can pick it up.
What Sri Lankan businesses send on WhatsApp
Choose a business to see a conversation. Customers tap a button or write back, and you see the answer straight away.
Online stores
Cash-on-delivery orders, confirmed before they ship
Customers confirm their order with one tap, so you only pack the parcels someone is waiting for.
- Order confirmations with a product photo and Confirm and Cancel buttons
- Dispatch and delivery updates
- Return and refund updates
Hi Nimali, thanks for your order #4821 🛍️ Total: Rs. 8,450, cash on delivery. Please confirm and we’ll send it today.
Confirm order
Thank you! Your order is confirmed ✅ It leaves our warehouse today and should reach you by Thursday.
Couriers
Deliveries customers are home for
People pick a better day before the rider sets out, not after a failed delivery attempt.
- Out-for-delivery alerts with a time window
- Reschedule and address-change requests
- Delivery confirmations
Hi Ruwan, your parcel LK2093145 is out for delivery today, between 2 pm and 5 pm 🚚
Deliver tomorrow
Done. We’ll bring it on Wednesday, between 9 am and 1 pm. Reply here if anything changes.
Clinics
Fewer empty appointment slots
Patients confirm, reschedule or cancel from the reminder itself, and your reception sees the answer straight away.
- Channelling and appointment reminders
- Rescheduling confirmations
- Notices that a report is ready to collect
Reminder: your appointment with Dr. Fernando is tomorrow at 4:30 pm. Your number is 12.
Reschedule
No problem. Dr. Fernando is also free on Friday at 5:15 pm. Shall we book that for you?
Yes please, Friday is fine 🙏
Tuition classes
Fee reminders parents can answer
Send fee reminders and class updates to parents, and answer their questions in the same chat.
- Monthly class fee reminders
- Cancelled classes and timetable changes
- Paper and exam result notices
Good morning! Sahan’s October class fee of Rs. 3,500 is due on 5 October.
Can I pay at the class on Saturday instead?
Of course. Please bring the fee card so we can mark it. See you on Saturday!
Internet and utilities
The bill itself, not a link to it
Send each month’s bill as a PDF that customers can open, save or forward to whoever pays it.
- Monthly bills and invoices as PDFs
- Payment receipts
- Planned maintenance and outage notices
Hi Tharindu, your October bill is ready. Amount due: Rs. 4,980 by 15 November.
Ask about my bill
Hi Tharindu, this is Ishara from customer care. Your bill includes a Rs. 900 data add-on from 12 October. Shall I explain it?
Leasing and finance
Instalment reminders customers trust
Reminders arrive under your business name, not an unknown number, so customers know it’s really you.
- Instalment and due-date reminders
- Payment receipts
- Settlement and renewal notices
Hi Kasun, your lease instalment of Rs. 42,300 for WP CAB-4521 is due on 10 October.
Talk to an officer
Hi Kasun, this is Dilani from customer care. How can I help you today?
WhatsApp plans
A fixed monthly price for the platform. Every plan includes the API, message templates, delivery and read webhooks, the inbox and unlimited contacts.
WhatsApp Starter
€9.99 / month
≈ Rs. 3,750 a month, charged in EUR
- 5,000 API messages a month
- 1 WhatsApp number
- 1 inbox seat
- Unlimited contacts
- Templates, webhooks and inbox
Meta’s fee per messageSri Lankan numbers, from 1 October 2026
- Utility
- ≈ Rs. 0.66
- Order updates, reminders and bills
- Service
- ≈ Rs. 0.66
- Replies within 24 hours of a customer’s message. First 1,000 a month free on each number.
WhatsApp Growth
€19.99 / month
≈ Rs. 7,500 a month, charged in EUR
- 15,000 API messages a month
- 2 WhatsApp numbers
- 3 inbox seats
- Unlimited contacts
- Templates, webhooks and inbox
Meta’s fee per messageSri Lankan numbers, from 1 October 2026
- Utility
- ≈ Rs. 0.66
- Order updates, reminders and bills
- Service
- ≈ Rs. 0.66
- Replies within 24 hours of a customer’s message. First 1,000 a month free on each number.
WhatsApp Scale
€29.99 / month
≈ Rs. 11,250 a month, charged in EUR
- 30,000 API messages a month
- 5 WhatsApp numbers
- 5 inbox seats
- Unlimited contacts
- Templates, webhooks and inbox
Meta’s fee per messageSri Lankan numbers, from 1 October 2026
- Utility
- ≈ Rs. 0.66
- Order updates, reminders and bills
- Service
- ≈ Rs. 0.66
- Replies within 24 hours of a customer’s message. First 1,000 a month free on each number.
- Meta’s message fees are billed separately. Meta charges your own card directly, through your WhatsApp Business Account, for each message it delivers. The fees on each plan are Meta’s rates for Sri Lankan numbers from 1 October 2026 (US$0.002 a message, at about Rs. 331 to the dollar on 30 September 2026). Other kinds of message, such as OTPs and promotions, have their own rates; see Meta’s current rates.
- Plans are charged monthly in euros, by card, by Beyond Git, the Dutch company behind Chateta. The rupee amounts are a guide only (about Rs. 376 to the euro on 28 September 2026) and your bank’s rate may differ.
- For Sri Lankan (+94) WhatsApp numbers.
- AI replies and the website chat widget are not included. They come with Chateta’s AI plans, which you can upgrade to at any time.
Free for launch customers
We’ll set it up for you
Getting onto WhatsApp’s official platform involves some paperwork with Meta. Our team takes care of it with you, so you can start sending sooner.
- Meta business verification
- Connecting your WhatsApp number
- Getting your first message templates approved
- A walkthrough of the API and the inbox
How it works
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Connect your WhatsApp number
Verify your business with Meta and connect the number your customers will see.
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Get your templates approved
Write your OTP, order and reminder messages once. Meta reviews each one, usually within a day.
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Send through the API
Your system calls one endpoint with the customer’s number, the template and its values.
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Handle replies
Answer customers in the Chateta inbox.
Coming soon Replies delivered to your own system by webhook.
For your developers
If you already send SMS through our API, sending on WhatsApp will look familiar. One difference: WhatsApp messages that start a conversation use a template Meta has approved, so you send the template’s name and its values instead of free text.
curl https://app.notify.lk/api/v1/send \
-d user_id=YOUR_USER_ID \
-d api_key=YOUR_API_KEY \
-d sender_id=YourBrand \
-d to=94771234567 \
-d message="Hi Nimal, your order #1234 is on its way."curl https://app.chateta.com/api/messaging/v1/messages/template \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Idempotency-Key: order-1234-shipped" \
-H "Content-Type: application/json" \
-d '{
"to": "+94771234567",
"template": "order_shipped",
"language": "en_US",
"parameters": ["Nimal", "#1234"]
}'Webhooks, templates and the rest of the API are explained on Chateta’s WhatsApp API page for Sri Lanka.
Request access
WhatsApp by Notify.lk is available now. Send us a message on WhatsApp and we’ll set up your account and onboarding with you.
Tell us your company name, roughly how many messages you’ll send a month and what they’re for, and we’ll take it from there.
WhatsApp or call 0766-4444-65
Questions about WhatsApp by Notify.lk
Because two companies are involved. Chateta charges a monthly plan for the platform (the API, templates, webhooks and inbox), in euros, by card. Meta, the company behind WhatsApp, charges for the messages it delivers and bills your own card on your WhatsApp Business Account. We don’t add anything on top of Meta’s fees.
Your Notify.lk SMS account is not affected. It keeps being billed in rupees, as it is today.
Yes. Every business on WhatsApp’s official platform needs a Meta business portfolio (it used to be called Business Manager), and Meta asks most businesses to verify their details. If you don’t have one yet, we’ll set it up with you as part of onboarding.
Yes, if it’s a Sri Lankan number that can receive a verification SMS or call. One catch: a number can’t be on the WhatsApp or WhatsApp Business app and on the API at the same time. If your number is on the app today, it has to be removed from the app first. Many businesses use a separate number for their API messages instead. We’ll go through the options with you before anything changes.
Of course. Your Notify.lk account, Sender IDs and API integration stay exactly as they are. Most businesses will use both: WhatsApp for OTPs, alerts and conversations, and SMS for promotions and for customers who don’t use WhatsApp. Automatic fallback from WhatsApp to SMS is coming soon.
WhatsApp by Notify.lk runs on Chateta, our WhatsApp platform partner. Chateta is run by Beyond Git, a company in the Netherlands, so the monthly plan is charged by Beyond Git, in euros. Your bank converts the amount to rupees and may add its own fee for foreign-currency payments. Meta’s message fees are charged by Meta, separately.
Yes. It uses Meta’s official WhatsApp Business Platform, and Chateta is an official Meta Tech Partner. No unofficial apps or workarounds are involved.
Yes. A message can carry a link, in the text or on a button such as Track order or Pay now, and a photo, a video or a PDF document at the top. You add the file by its HTTPS link when you send the message through the API.
It costs the same as a text-only message. It counts as one API message on your plan, and Meta’s fee depends on the kind of message (such as a verification code or an order update), not on what it contains.
WhatsApp limits the file size:
- Photos: JPEG or PNG, up to 5 MB
- Videos: MP4 or 3GPP, up to 16 MB
- PDF documents: up to 100 MB
Customers download the file on their phone, so smaller files arrive faster. A PDF invoice or a compressed product photo is usually well under 1 MB.
Once you’ve used your plan’s API messages for the month, further API sends are paused until the limit resets on the 1st. You can move to a bigger plan at any time. Failed sends don’t count towards the limit, and neither do replies your team sends from the inbox. If you expect a busy month, talk to us beforehand.
Yes. AI replies and the website chat widget come with Chateta’s AI plans. When you’re ready you can upgrade from your WhatsApp plan and keep your number, templates and conversations.
Something else? Ask us on WhatsApp or email [email protected].
WhatsApp by Notify.lk, powered by Chateta.