Is WAStack the official WhatsApp Business API?

No. WAStack connects an existing WhatsApp account through a QR-based session. It is not affiliated with WhatsApp or Meta. Review WhatsApp’s terms and use permission-based messaging for your use case.

Can I keep my existing WhatsApp number?

Yes. Pair your existing number from WhatsApp’s Linked devices screen using the QR code in your WAStack workspace. Your connected session can then be used with REST APIs and webhooks.

What do I need to get started?

Create an account, add a device, and scan its QR code with WhatsApp. Create an app integration for that device to obtain the credentials for your first API request. The documentation walks through each step.

Build opt-in order notifications, appointment reminders, support replies, and CRM follow-ups. Use the message API to send messages and webhooks to connect incoming conversations to your tools.

Where can I compare plans?

The pricing page includes session limits, message allowances, and included features for each plan. You can start with a free account and review the available plans in your workspace.

Your business knowledge. Put to work.

Your business.
Your AI.
On WhatsApp.

Turn your website and company knowledge into helpful replies. Bring your OpenRouter key, choose your AI model and set your business voice. Keep APIs, webhooks and conversations in the same workspace.

Get started free Explore AI automation

Connect your number → add your knowledge → test your assistant.

Your existing numberYour choice of AI modelAPIs + webhooks included

One number. More possibilities.

Knowledge → context → helpful replies

Built for builders & businesses

A messaging stack for everyday operations

DevelopersAgenciesEcommerceSupport teams

Simple to start. Room to fine-tune.

An assistant that knows
your business.

Start with your website, review the facts and choose how your business speaks. Your assistant uses relevant knowledge and recent conversation to write helpful WhatsApp replies.

Follow the setup guide See every AI control

OpenRouter supported today. Choose available free or paid text models with your own key. Provider charges and limits are separate from your WAStack plan; embeddings can cost money even when replies use a free model.

From website to a helpful answer

1. Import and review your knowledge
Your website, selected pages or sitemap. Keep the facts you want the assistant to use.
2. Find the relevant facts
Optional embeddings reuse indexed knowledge and select excerpts for each question.
3. Reply in your voice
Your chosen AI model combines facts, persona and recent conversation into WhatsApp text.

Start without writing code

Connect OpenRouter in the dashboard, set a persona, add knowledge and preview a reply before switching on automation.

Tune quality and prompt cost

Choose reply and embedding models separately. Set retrieval limits and reuse saved knowledge vectors after each index.

Keep your team in control

Pause replies per conversation. Track tokens and provider costs. Full prompt and result capture is optional and off by default.

Less busywork. More connection.

The right message.
At the right moment.

Explore every feature

Choose a workflow to explore

Knowledge + conversation

Helpful answers in your business voice.

Use reviewed business facts and recent conversation with the OpenRouter model you choose.

Read the guide

Interactive example · no messages are sent

Workflow previewSample data

01 / TRIGGER

Customer asks about your returns policy

02 / ACTION

Find relevant facts and generate a contextual reply

Message preview

You can return your item within 30 days. Please bring your receipt so we can help.

Try the sample workflow to see the result.

Connect your number

Pair an existing WhatsApp account with a QR code. Manage connected devices in your workspace.

Build with REST APIs

Send text and media from your application using JSON payloads and app credentials.

Keep your tools in sync

Bring incoming messages into your workflows with webhook events.

A clear path to your first message

Three steps.
One connected workspace.

Start with a number you already use, then build the workflow your customers need.

Step 1 of 3

Create your workspace

Create your account

For the way you build

Your stack.
Now with WhatsApp.

Start with an API request. Connect incoming messages to your app. Keep devices, credentials, and conversations in one workspace.

JSON request bodies
App key + bearer authentication
Text, media, and webhook workflows

Explore the API docs

javascript

const response = await fetch("https://api.wastack.in/api/v1/send", {
  method: "POST",
  headers: {
    "X-App-Key": "YOUR_APP_KEY",
    "Authorization": "Bearer YOUR_AUTH_KEY",
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
    to: "919876543210",
    text: "Your order #2048 is on its way."
  })
});

if (!response.ok) throw new Error("Message request failed");
const result = await response.json();

Illustrative example. Use your own credentials and an opted-in recipient.

Room to grow

Start small.
Build what comes next.

Compare all plan details

One payment. A full year of access.

One allowance. Every message type.

The same WAStack rate for marketing, utility and authentication. No category-based pricing.

Marketing
Utility
Authentication

Basic

$1.67/ month equivalent

$20 paid yearly · 365 days of access · USD

$36Save $16 / year (44%)

Compared with 12 monthly plan purchases.

Effective cost per message

≈ $0.005556USD / message

At full included usage across all 12 monthly allowances. Included in your subscription.

WhatsApp devices: 1
Messages per month: 300
Contacts: 100
Message templates: 10
API apps: 1

Message allowance refreshes monthly. Unused messages do not roll over.

Webhooks: Not included
Chatbot auto-replies: Not included
Bulk campaigns: Included
Scheduled messages: Included
Chat list access: Not included
Group list access: Not included

Choose Basic yearly

Advance

Recommended

$4.17/ month equivalent

$50 paid yearly · 365 days of access · USD

$60Save $10 / year (17%)

12 months for the price of 10 — 2 months free.

Effective cost per message

≈ $0.001389USD / message

At full included usage across all 12 monthly allowances. Included in your subscription.

WhatsApp devices: 1
Messages per month: 3,000
Contacts: 10,000
Message templates: 1,000
API apps: 5

Message allowance refreshes monthly. Unused messages do not roll over.

Webhooks: Not included
Chatbot auto-replies: Included
Bulk campaigns: Included
Scheduled messages: Included
Chat list access: Not included
Group list access: Not included

Choose Advance yearly

Enterprise

$25/ month equivalent

$300 paid yearly · 365 days of access · USD

$360Save $60 / year (17%)

12 months for the price of 10 — 2 months free.

Effective cost per message

≈ $0.0008333USD / message

At full included usage across all 12 monthly allowances. Included in your subscription.

WhatsApp devices: 5
Messages per month: 30,000
Contacts: Unlimited
Message templates: 10,000
API apps: 100

Message allowance refreshes monthly. Unused messages do not roll over.

Webhooks: Included
Chatbot auto-replies: Included
Bulk campaigns: Included
Scheduled messages: Included
Chat list access: Included
Group list access: Included

Choose Enterprise yearly

Yearly prices are paid upfront. The monthly equivalent is for comparison. Each card shows its message allowance and refill policy. Effective message costs divide the subscription price by all included messages for its term, assuming full usage. Review taxes, payment fees, and the final total in your workspace before payment.

Before you get started

Good questions.
Clear answers.

Need help choosing a path? Talk to our team.

Connect your own OpenRouter key and choose a supported free or paid text model. Add your persona, import and review website knowledge, and optionally choose a separate embedding model for relevant-fact retrieval. Preview before enabling auto-replies, and track provider costs separately from your WAStack plan. OpenRouter is supported today; other providers are a future direction.

Your next workflow starts here

Put your conversations
to work.

Create your workspace, connect your number, and take the first step toward a more connected customer experience.

Get started free Read the getting-started docs

QR-based connection · Not affiliated with WhatsApp or Meta

Your business.Your AI.On WhatsApp.

An assistant that knowsyour business.

Start without writing code

Tune quality and prompt cost

Keep your team in control

The right message.At the right moment.

Helpful answers in your business voice.

Connect your number

Build with REST APIs

Keep your tools in sync

Three steps.One connected workspace.

Create your workspace

Your stack.Now with WhatsApp.

Start small.Build what comes next.

Basic

Advance

Enterprise

Good questions.Clear answers.

Can I use my own AI model for WhatsApp replies?

Is WAStack the official WhatsApp Business API?

Can I keep my existing WhatsApp number?

What do I need to get started?

What can I automate?

Where can I compare plans?

Put your conversationsto work.

Your business.
Your AI.
On WhatsApp.

An assistant that knows
your business.

The right message.
At the right moment.

Three steps.
One connected workspace.

Your stack.
Now with WhatsApp.

Start small.
Build what comes next.

Good questions.
Clear answers.

Put your conversations
to work.