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Bulk SMS

Messaging

Reach your customers instantly — wherever they are. Whether you're sending OTPs, campaign updates, or personalised alerts, Belio delivers your messages reliably at scale with a simple API built for developers and teams alike.

Get Started
400/sSend rate
100+Recipients/call
99.9%Uptime
How it works

Send your first bulk campaign in minutes

Try sandbox
01

Sign Up Free

Create your account in seconds and get free SMS credits to test the platform. No credit card required — start with our sandbox environment instantly.

Sandbox available
02

Select Service & Add Contacts

Choose your SMS service, then add recipients by typing manually, importing a CSV or Excel file, or selecting from a saved contact list.

CSV & Excel import
03

Compose & Personalise

Write your message and insert dynamic placeholders like {firstName} — values are automatically substituted from your contact list columns at send time.

Dynamic placeholders
04

Review, Schedule & Track

Preview your message, then send instantly or schedule for a future date and time. Track delivery status in real-time and access per-task reports from your dashboard.

Real-time reports
Use cases

Built for real-world scenarios

Notification Services

Add instant notifications to your applications to inform clients when important events are generated. Sample scenarios include financial transactions, reminders, or sharing updates with your users.

Two-factor Authentication

Secure your mobile and web applications by sending SMS-based authentication tokens — a useful and vital tool for verifying the identity of your users.

Collect Feedback

Conduct surveys via SMS. Send questions to your users, give them a platform to respond, and collect valuable feedback to make informed decisions.

Features

Everything you need, nothing you don't

Delivery Reports

We process and share delivery notifications received from carriers to your applications for all SMS messages sent using our APIs.

Message Queuing

Our gateways handle thousands of concurrent message requests at any one time, ensuring reliable delivery at scale.

Real-time Analytics

Monitor SMS activity, delivery rates and troubleshoot any anomalies from our comprehensive reporting dashboard.

All you need to send SMS

Two ways to send — your choice

Integrate directly via our REST API, or use the Belio portal for a no-code experience. Either way, your bulk task list and delivery reports are always available in the portal.

Via REST API

Integrate into your app

  • SendToEach — personalised message per recipient
  • SendToMany — one message to up to 100 recipients
  • 400 messages/second rate limit
  • Delivery receipts via webhook callback URL
  • 960 character limit per message
Read the API docs

Via Belio Portal

No code required

  • Upload contact lists and send bulk campaigns
  • Schedule messages for any future date & time
  • View all bulk tasks and click to see message details
  • Access delivery reports per task
  • Manage sender IDs and services in one place
Open the portal
POST api.belio.co.ke/message/{serviceId}
curl --request POST \
  --url https://api.belio.co.ke/message/{serviceId} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "type": "SendToEach",
  "messages": [
    {
      "text": "Hi {firstName}! Use BELIO20 for 20% off.",
      "phone": "+2547XXXXXXXX"
    }
  ],
  "receiptRequest": {
    "correlator": "ref-001",
    "callbackUrl": "https://your-app.com/receipts"
  }
}'
← personalised per recipientFull API docs
FAQ

Common questions

Most messages are delivered within seconds. Delivery speed depends on network conditions and the recipient's device status. Our high-capacity gateways ensure minimal latency even during peak traffic.

Ready to get started?

Create a free sandbox team and send your first message in minutes.

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