AI agents that reply 24/7
AI agents answer questions, qualify leads, book meetings and update the CRM at any hour. When a customer needs a person, they hand off with full context and keep replying until someone joins.
Official WhatsApp Business API
WhatsApp Business API platform with AI agents that answer 24/7
Connect your number to the official Cloud API in minutes and let AI agents reply, qualify and book while your team handles the chats that need a person. Every chat, call and quote lives in one WhatsApp CRM.
- Free plan, no time limit
- No credit card required
- Launch in minutes
The WhatsApp Business API, officially WhatsApp Business Platform, is Meta's interface for sending and receiving WhatsApp messages from software instead of a phone app. Rexenda connects your number to it in minutes with Meta's Embedded Signup, so your whole team shares one inbox and AI agents reply around the clock. Meta bills its fees directly to your own account.
When WhatsApp is your sales channel, one phone is not enough
Messages arrive at night and on weekends, and by the time someone replies, the customer has bought elsewhere.
Several people share one phone, nobody knows who answered what, and customer history is scattered across devices.
Outside the 24-hour window your replies fail, templates get rejected, and you cannot tell which ads bring in buyers.
Everything your business needs on WhatsApp, in one place
Rexenda runs on Meta's official WhatsApp Business Platform, so you get the reliability of the API with a CRM, AI agents and payments built around it.
One shared inbox, several numbers
Connect more than one WhatsApp number to the same workspace. Your team works from one inbox with roles and per-number visibility, and each customer keeps a single history across channels.
Templates and the 24-hour window, handled
Draft message templates with AI help, submit them to Meta and track their status and quality. Rexenda tracks the 24-hour customer service window for each contact, so your team and AI agents know when a template is required.
WhatsApp calls, answered
Take and place WhatsApp voice calls from the browser, or let an AI voice agent handle them. Outbound calls follow Meta's call-permission request, and calls can be recorded, with hold music while you transfer.
Know which ad brought each customer
When someone writes from a click-to-WhatsApp ad, Rexenda records which Meta ad it was. You see where your buyers come from, not just how many messages you received.
Quotes and payments inside the chat
Create quotes and send card payment links straight from the conversation, paid into your own Stripe account with no cut for Rexenda. In Mexico, you can also issue CFDI 4.0 invoices from the same chat.
WhatsApp Business app vs. the API on its own vs. the API in Rexenda
| WhatsApp Business app | API on its own | API in Rexenda | |
|---|---|---|---|
| Who answers | One phone and its linked devices | Whoever uses the software you build or hire | Your whole team, across several numbers, in one inbox |
| Getting connected | Install the app on a phone | Developer work or a separate provider | Meta's Embedded Signup in minutes, no code |
| CRM and AI agents | Chat labels only; no CRM to update | Only what you program yourself | Built-in CRM; AI agents reply 24/7 and update it |
| Outside the 24-hour window | No such rule; you write from the phone | Approved templates only; you track the window yourself | Approved templates; the window is tracked for every contact |
| Message fees | Not part of the API's pricing | Meta bills delivered templates to your account | Meta bills your own account; Rexenda charges nothing per message |
Live on WhatsApp in four steps
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Create your free account
Sign up on the free plan. No credit card and no time limit.
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Connect with Meta
Use Meta's Embedded Signup to link your WhatsApp Business Account and number in a few minutes, without writing code.
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Set up your AI agent
Start from a template or describe the job in plain words. Add your knowledge, tone and handoff rules.
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Sell and support
Your AI agent replies right away, your team steps in when needed, and every conversation lands in the CRM.
Good to know before you connect
- Rexenda does not charge per WhatsApp message. Meta bills its own messaging fees directly to your WhatsApp Business Account, using the payment method you set up with Meta.
- Outside the 24-hour customer service window, WhatsApp only allows Meta-approved templates. Meta reviews every template, and approval is its decision.
- AI replies draw from the AI credits included in your plan, and extra packs are available. Opt-outs that Meta reports are honoured, so those contacts stop receiving that type of message.
WhatsApp Business API: frequently asked questions
How do I connect the WhatsApp Business API?
With Rexenda you connect it in a few minutes through Meta's Embedded Signup. You sign in with your Meta account, choose or create your business portfolio and verify the phone number. There is no code to write and no developer to hire. Once connected, messages arrive in your Rexenda inbox and your AI agent can start replying.
Does Rexenda charge per WhatsApp message?
No. Rexenda does not charge for WhatsApp messages. Meta bills its WhatsApp fees directly to your own WhatsApp Business Account, using your payment method. Your Rexenda plan covers human users, channels and other limits, and AI replies use the AI credits included in your plan, with extra packs available if you need more.
Can an AI chatbot answer WhatsApp 24/7 and hand off to a person?
Yes. A Rexenda AI agent answers WhatsApp at any hour, uses your knowledge base and takes real actions: it qualifies leads, books meetings and sends quotes or payment links. When a conversation needs a person, it hands off with the full context and keeps replying until a team member actually joins, so the customer is not left without an answer.
Can I keep using the WhatsApp Business app on my phone?
Yes, if coexistence is available for your number. With WhatsApp coexistence you keep the WhatsApp Business app and the same number while Rexenda uses the API. Availability depends on Meta and on your number, and the signup shows it when you connect. Our coexistence page explains the rules Meta applies, such as opening the app at least once every 14 days.
Can my team share one WhatsApp number or use several numbers?
Yes, both. Your whole team can work the same WhatsApp number from one shared inbox, with roles, teams and routing, and you can connect several numbers to one workspace. Visibility can be limited per number, and each customer keeps one history across WhatsApp, calls, email and your other channels.
Put your WhatsApp to work around the clock
Connect the official API in minutes, start on the free plan and let AI agents answer while your team closes. No credit card needed.
Connect your WhatsApp free