Build Chat Agents. Deploy Instantly.
The easiest way to build and deploy AI chat agents on WhatsApp. Open-source SDK + managed backend. No Meta docs hell, no complexity.
Hey! I need help with my order #12345
Hello! I'll check the status of your order #12345 for you. Let me retrieve that information...
✅ Your order #12345 is being processed and will be shipped tomorrow. You'll receive an email with the tracking code.
Perfect! Thanks for the help
You're welcome! If you need anything else, I'm here to help. 😊
Would you like me to help you with anything else?
Official AWS Partner for enterprise-grade reliability and scalability
Brazil Leads WhatsApp Business
Brazil has led WhatsApp Business revenue for 5 years. 98% market penetration. Every business needs WhatsApp automation.
“Skip Meta's docs hell, deploy in 5 minutes”
We use WhatsApp Business API under the hood, but you never see the complexity. No business verification, no enterprise requirements, no 500-page docs.
Meta's WhatsApp API
The nightmare every developer faces
With ChatOS
Resend for chat agents
Two Products,One Goal
Open-source SDK for building + managed backend for deploying
chat-agent (Open Source)
Simple SDK to define structured AI chat agents. Config-based, model-agnostic.
npm i chat-agent
chatOS (Managed Backend)
Hosting, message delivery, scaling, platform integration. Deploy in 5 minutes.
npm i chatos“I felt this pain firsthand. It took weeks to build an agent. We have Resend for emails, Supabase for databases. It's time to have your Resend for WhatsApp and chat agents.”
Why ChatOS
Built for developers. Open source. Production-ready.
Developer-first
Inspired by Resend and BetterAuth. Clean APIs, TypeScript-first, no fluff.
Open Source + OSS Community
Use it freely, extend it, self-host it, and contribute with the community.
We handle WhatsApp complexity
Skip Meta docs hell; we handle all WhatsApp API complexity for you.
Model-agnostic
Plug in your preferred LLM — OpenAI by default; bring your own keys.
Templates & Presets
Sales, scheduling, support, and order-tracking bots ready to launch.
Flexibility
Self-host with full control, or pay us to manage the infrastructure.
Code an agent in minutes
Clean, developer-first APIs. Bring your own keys and ship to production fast.
npm i chat-agentexport const bot = chatAgent({
modelProvider: {
openai: {
apiKey: process.env.OPENAI_API_KEY!,
model: "gpt-4o",
},
},
questions: [
{ id: "name", prompt: "May I have your name?" },
{ id: "email", prompt: "What's your email address?" },
{
id: "issueType",
prompt:
"What type of issue are you experiencing? (e.g., billing, technical, account)",
},
{ id: "description", prompt: "Please describe your issue in detail." },
{ id: "urgency", prompt: "How urgent is this issue? (low, medium, high)" },
],
onComplete: async (data) => {
await zendesk.createTicket(data);
console.log("Support ticket:", data);
// { name: "...", email: "...", issueType: "...", description: "...", urgency: "..." }
}
});Connect with your favorite tools
Integrate your agents with the leading platforms in just a few clicks. No complex configurations or technical knowledge required.
Individual Plans
- ✓ 1 WhatsApp agent
- ✓ 1,000 messages per month
- ✓ Basic AI models (GPT-3.5)
- ✓ Pre-built templates
- ✓ Community support
- ✓ Up to 10 WhatsApp agents
- ✓ 50,000 messages per month
- ✓ Advanced AI models (GPT-4, Claude-3)
- ✓ Custom templates & workflows
- ✓ Analytics & performance insights
- ✓ Unlimited WhatsApp agents
- ✓ 1M+ messages per month
- ✓ Custom AI model training
- ✓ White-label solutions
- ✓ Dedicated account manager
Ready to Get Started?
Join the waitlist and be the first to experience the future of chat automation