Meta's official WhatsApp API has no platform fee, and the first 1,000 replies to customers each month are free per number. Messages you start, such as order updates, are always charged. Free tiers and open-source libraries exist, but they cap volume or make you run and repair the connection yourself. Use free to build and test; budget for the messages you send first.
Five ways to use WhatsApp for free
"Free" means something different for each option. Here is what each one gives you without paying, and where the free part ends.
| Option | What is free | Where free stops |
|---|---|---|
| WhatsApp Business app | The app on your phone, with greeting and away messages. | There is no API. Someone has to answer by hand. |
| Meta's Cloud API (WhatsApp Business Platform pricing) | No platform fee. 1,000 replies a month per number. Everything you send after a customer taps a click-to-WhatsApp ad, for up to 7 days. | Every message you start is charged, by country and category. |
| Twilio (pricing) | A free trial with no credit card. | After the trial, $0.005 per message plus Meta's fees. |
| Linked-device APIs with a free tier | A small monthly allowance on your own number, with no Meta approval. | Tight caps: from 3 chats to 500 messages a month. Details below. |
| Open-source libraries | Baileys (MIT) and whatsapp-web.js (Apache 2.0) cost nothing to use. | You run the servers and fix it when WhatsApp changes. Both say they are unofficial. |
What Meta gives you for free
Meta's official API, the WhatsApp Business Platform, has no monthly fee. You pay per delivered message, and the price depends on the message's category and the customer's country. Two things are free:
- 1,000 replies a month, per business number. These are service messages: answers inside the 24 hours after a customer writes to you. The 1,001st is charged, and unused ones do not roll over.
- The free entry point window. When someone messages you from a click-to-WhatsApp ad on the Android or iOS app, everything you send them is free for up to 7 days.
One thing stopped being free on 1 October 2026: utility templates, such as order updates, sent while the customer's 24-hour window is open. They are now charged like any other utility message.
| If you mostly... | Meta's bill |
|---|---|
| Answer customers who write first, under 1,000 replies a month | Nothing |
| Answer more than that | The service rate from reply 1,001 |
| Send order updates or reminders | Every message. 10,000 in India cost $14, in the US $34 |
| Send promotions | Every message, at the marketing rate, the highest one |
The free part also comes with setup: a Meta business account, a phone number that is not already on WhatsApp, and an approved template for every message you start. The rates per country are in our WhatsApp API pricing guide.
Free tiers on linked-device APIs
Linked-device APIs connect a normal WhatsApp number the way WhatsApp Web does. There is no Meta approval and no per-message fee. A few of them have a free tier, checked on 27 October 2026:
| API | Free tier | Cheapest paid plan |
|---|---|---|
| Green-API | 3 chats | $12 a month |
| Whapi.Cloud | 5 conversations a month, 150 messages a day, 1,000 API requests a month | $29 a month |
| ChatRail | 1 number, 500 messages a month, 50 AI replies, 7-day message log | $15 a month |
These tiers are for testing and small personal automations. None of them will carry a shop's order updates. They are a way to build the integration and see it work on your own number before you pay.
What free costs you
A free option still has a price. It is just not on the invoice.
| Free option | The hidden cost |
|---|---|
| Meta's free replies | Business verification, a dedicated number and template approval before you send anything first. |
| Open-source libraries | A server running all day, and repairs when WhatsApp changes its web protocol. whatsapp-web.js says it is not guaranteed you will not be blocked. |
| Free tiers | Low caps, and features such as media or groups kept for paid plans. |
| Any unofficial route | No green tick, and WhatsApp can restrict a number that gets reported. Baileys' README tells users not to spam. |
Bans come from behaviour, not from the price you paid. A free library that messages strangers in bulk gets a number restricted as fast as a paid API would. Our guide to avoiding a ban covers the rules that matter.
Which free option fits
| If you want to... | Start with |
|---|---|
| Answer customers by hand | The WhatsApp Business app |
| Answer customers from your own system, at low volume | Meta's Cloud API, inside the 1,000 free replies |
| Test an integration on the number you already have | A linked-device free tier |
| Learn how WhatsApp automation works, on a spare number | Baileys or whatsapp-web.js |
| Send alerts and updates every day | A paid plan. Nothing free covers it |
When you outgrow free, compare per-message pricing with a flat monthly fee. ChatRail's Core plan is $15 a month for one number with no per-message fee. It still stops the 11th message to the same person within five minutes, to protect the number.
ChatRail sells a linked-device WhatsApp API with a free Sandbox, so we have a stake in this answer. Meta's terms are from its WhatsApp Business Platform pricing page. Twilio, Whapi.Cloud, Green-API, Baileys and whatsapp-web.js are from their own pages. All were opened on 27 October 2026. ChatRail's limits are from our code the same day. Free tiers change often, so check the page before you choose.