Write Once. Deliver Everywhere.
One omnichannel messaging API for SMS, WhatsApp Business, and RCS. Route across channels, fall back automatically, and reach customers in 100+ countries — from a single endpoint.
— The Problem —
Multi-Channel Messaging Is Broken
Most enterprises bolt together SMS, WhatsApp, and RCS through separate vendors — each with its own SDK, payload, and webhook. The result is integration debt and dropped messages.
— The Platform —
One API. Every Channel. Zero Complexity.
HookZ Connect unifies SMS, WhatsApp, and RCS under one intelligent orchestration engine — a single endpoint, smart routing, automatic fallback, and unified tracking.
One API, Every Channel
A single endpoint for SMS, WhatsApp Business, and RCS — with a unified payload model and consistent media handling.
Smart Routing & Fallback
Route by cost, speed, or order. Automatically fail over from RCS → WhatsApp → SMS so a message never drops.
Unified Webhook & Tracking
One message ID, one webhook, one schema. Statuses, failures, and timestamps for every channel in one stream.
Smart Delivery Engine
Picks the best channel for every recipient using historical performance, capability detection, and your priority rules.
Pick the Best Channel for Every Message
Configure delivery rules per message type. The engine inspects recipient capability, applies your priority logic, and cascades across channels when a message fails to land.
Automatic Fallback Examples
— Channels —
Every Channel Your Customers Use
Native, first-party integrations — not screen-scraped aggregation.
SMS
100+ countriesTier-1 carrier routes, A2P 10DLC ready, OTP-grade latency, and global short/long-code support.
WhatsApp Business API
Official BSPTemplated messaging, two-way conversations, rich media, quick replies, and WhatsApp Business Calling (beta).
RCS Business Messaging
BrandedVerified sender, carousels, suggested actions, and rich media on native Android messaging.
Voice Broadcast & OTP
PSTN + IPProgrammable voice OTP and broadcast as an additional fallback channel for mission-critical delivery.
— Use Cases —
Built for Every Messaging Workload
OTP & Authentication
WhatsApp-first OTP with SMS and Voice fallback — sustain 98%+ delivery rates globally.
Marketing Campaigns
Launch RCS-rich campaigns with WhatsApp/SMS fallback from a single no-code broadcast portal.
Order & Shipping Updates
Transactional alerts that always arrive — even when one channel is throttled or unavailable.
Transactional Alerts
Account changes, payment confirmations, and security notices across the customer's preferred channel.
Government Notifications
Citizen messaging with sovereign delivery, audit trails, and multi-language templates.
AI Agent Conversations
Plug agentic voice and chat AI directly into the same unified messaging stream.
Integrate in Hours, Not Quarters
One REST endpoint. Official SDKs for Node.js, Python, Java, PHP, and .NET. Postman collections, quickstart tutorials, and webhook samples — plus a no-code workflow builder for marketers.
{
"to": "+14155550123",
"channels": ["rcs", "whatsapp", "sms"],
"mode": "quick",
"content": {
"text": "Your OTP is 482910",
"template": "otp_v2"
},
"callback_url": "https://api.you.com/hooks"
}
Built for Regulated, Global Scale
— Industries —
Powering Messaging Across Industries
Banking & FinTech
OTP delivery, fraud alerts, statement notifications with full audit trail.
Healthcare
Appointment reminders, prescription pickups, HIPAA-grade patient messaging.
Retail & E-commerce
Cart recovery, order updates, WhatsApp commerce, RCS catalog campaigns.
Travel & Hospitality
Itinerary updates, disruption alerts, multilingual concierge messaging.
Government & Public Sector
Multi-channel citizen notifications with sovereign deployment options.
Logistics & Supply Chain
Real-time delivery tracking, driver dispatch, proof-of-delivery flows.
HookZ Connect FAQ
Common questions from developers, product, and CX leaders
Start Building Smarter Messaging Today
One API, every channel. See HookZ Connect live with your traffic, your fallback rules, and your AI workflows.