Easiest WhatsApp API
For Developers
Unlimited messages. Multiple sessions. Webhooks built in. No per-message fees.
The Developer-First
WhatsApp API
A developer-first platform with powerful APIs, real-time webhooks, and enterprise-grade reliability.
Lightning-fast API
Send and receive WhatsApp messages with sub-second latency. RESTful and WebSocket endpoints designed for scale.
Real-time Webhooks
Receive incoming messages, status updates, and QR events through reliable webhook delivery with automatic retries.
Multi-instance Management
Run multiple WhatsApp sessions under one account. Perfect for agencies, support teams, and multi-brand operations.
Cloud-hosted & Always-on
No need to manage servers or keep a phone online. Our infrastructure ensures your connections stay active 24/7.
Enterprise Security
End-to-end encryption, rate limiting, and IP whitelisting. SOC2-aligned security practices with full audit logging.
Developer SDKs & Docs
Comprehensive API documentation, code examples in multiple languages, and community SDKs to get you shipping fast.
Send a Message in Seconds
Copy-paste ready code snippets in your favorite language.
Simple, Transparent Pricing
No per-message fees. Just flat-rate plans that scale with you.
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About RexLab.
We are a software lab engineering real-world problem-solving applications. From intelligent automation to business-critical tools, we build systems that streamline operations and deliver measurable impact.