Four Channels, One Gateway

Speak to Nigeria in its own dialect.

Every customer answers differently — a text, a call, a WhatsApp ping. Mesaj routes through all four, so you never have to guess which one lands.

Bulk SMS Voice OTP WhatsApp IVR Advanced IVR

Channel 01

Bulk SMS

Direct interconnects with MTN, Airtel, Glo, and 9mobile mean your messages skip the queue other gateways sit in. Alpha-numeric Sender IDs are registered and live in days, not weeks.

check_circleTRANSACTIONAL & PROMOTIONAL routing — pick the type per message; we apply DND filtering automatically where it's required.
check_circleSingle & bulk send on the same endpoint family — one recipient or one hundred thousand.
check_circleDelivery receipts pushed to your webhook in real time, network by network.

Read the Bulk SMS API reference arrow_forward

POST /client/sms/send/bulk

// request body
{
  "data": {
    "sender_id": "MESAJ",
    "message": "Your OTP is 8421",
    "type": "TRANSACTIONAL",
    "recipients": ["234803xxxxxxx"]
  }
}

call

Outbound Voice OTP

Auto-redial enabled

Attempt 1 · 234803xxxxxxxNo answer

Attempt 2 · 234803xxxxxxxAnswered · 12s

OTP spoken"8 - 4 - 2 - 1"

Channel 02

Voice OTP

When DND filtering or network congestion blocks a text, Voice OTP calls the handset directly and reads the code aloud. Automated redials run until someone picks up.

check_circleText-to-speech in English and major Nigerian-accented voice profiles.
check_circleConfigurable retry count and spacing between attempts.
check_circleCall outcome webhooks: answered, busy, unreachable.

Channel 03

WhatsApp IVR

Build menu-driven conversations on the WhatsApp Business API — balance checks, order status, support triage — without writing a chatbot framework from scratch.

check_circleTemplate message approval handled through Mesaj on your behalf.
check_circleInteractive list and button replies mapped straight to your webhook.
check_circleMedia support: images, PDFs, and location pins in both directions.

Hi! How can we help today?

1️⃣ Check balance
2️⃣ Track order
3️⃣ Talk to support

Order #4471 is out for delivery — ETA 24 mins.

Channel 04 · Enterprise

Advanced Inbound & Outbound IVR

Talk to Sales

account_tree

Dynamic Menus

Branching phone trees built in a visual flow editor — no telephony code required.

fiber_manual_record

Call Recording

Every leg recorded and archived for QA, compliance, or dispute resolution.

webhook

Real-time Webhooks

Call events — ringing, answered, DTMF input, hangup — pushed the moment they happen.

Which channel fits your message?

Channel	Best for	Bypasses DND	Typical latency
Bulk SMS	OTPs, alerts, reminders	Transactional only	<1.5s
Voice OTP	High-security login codes	Yes	~3-8s to answer
WhatsApp IVR	Support, order status, rich media	N/A	<2s
Advanced IVR	Call centers, surveys, menus	N/A	Real-time

Pick a channel. Ship today.

Every channel runs on the same account, API key, and Naira balance.

See Pricing