Enterprise A2P SMS gateway API for high-volume messaging & OTP SMS. 99.9% uptime. Perfect for banking & finance and developer integrations.

99.9% Uptime SLA • Starting at KES 0.25/SMS

A2P SMS Gateway & Seamless Integration

The best bulk sms provider in Kenya offering a powerful, developer-friendly SMS Gateway with enterprise-grade infrastructure for mission-critical communications.

Enterprise A2P SMS Gateway API for High-Volume Messaging and OTP Delivery

Integrate secure, scalable SMS messaging into your applications with our RESTful A2P SMS Gateway API. Perfect for banking alerts, OTP verification, transaction notifications, and automated customer communications. Features include real-time webhooks, comprehensive SDKs, 99.9% uptime SLA, and sub-2-second message delivery across all Kenyan networks.

99.9%
Uptime SLA
1000+
Messages/sec
~30ms
Avg Latency
24/7
Support

What is A2P & Bulk SMS?

A2P (Application-to-Person) SMS is the engine behind modern digital interactions—sending automated, high-volume messages from your system directly to your customers' mobile devices with unmatched reliability and speed.

📢

Marketing Campaigns

Send promotions, special offers, and announcements directly to your customers with unrivaled open rates.

🔔

Transactional Alerts

Deliver critical, time-sensitive alerts for payments, order confirmations, and service updates.

💬

Customer Service

Provide timely support, appointment reminders, and facilitate two-way feedback mechanisms.

🔐

Security & OTP

Secure user accounts and transactions with high-speed OTP integration for 2FA.

The Power Behind the Connection

Our cutting-edge SMS Gateway infrastructure is built for peak performance and 99.9% Uptime SLA across the entire Kenyan mobile network ecosystem.

🚀 High Throughput

Our gateway is engineered to handle massive volumes of messages per second. This capacity ensures your time-sensitive alerts and marketing blasts are delivered instantly, not delayed in a queue, giving you speed and reliability.

1000+

Messages/Second

🧠 Intelligent Routing

Our system dynamically selects the fastest and most reliable routes to minimize latency and maximize delivery rates for all your bulk sms traffic, ensuring critical messages always reach the intended recipient.

99.8%

Delivery Rate

📊 Real-Time Reporting

Get instant, webhook-driven delivery reports (DLRs) and detailed analytics. Measure the effectiveness of your communications and track the status of every single message in real-time on our dashboard.

Real-time

Analytics

✅ Reliability (99.9% SLA)

We guarantee 99.9% uptime through enterprise-grade infrastructure, redundancy, and failover mechanisms. Your critical OTPs and transactional messages are delivered reliably, minimizing business risk.

99.9%

Uptime SLA

Validated Performance: Success Stories

See how major fintech and e-commerce platforms leverage our speed and reliability to reduce latency and increase user satisfaction.

Fintech OTP Delivery Time Reduction

  • Result: 80% reduction in average OTP delivery time.
  • Delivery Rate: Achieved a 99.8% delivery rate for all OTP messages.
  • Impact: Led to a 50% reduction in customer support tickets and increased transaction speed.

E-Commerce Confirmation & Customer Satisfaction

  • Result: 65% increase in successful order confirmation delivery rates.
  • Efficiency: 40% reduction in "where's my order?" inquiries post-integration.
  • Impact: 25% improvement in overall customer satisfaction scores, building brand loyalty.

Technical Protocols & Performance Specs

We offer redundant, carrier-grade connections. Choose the protocol that best fits your system architecture and performance requirements.

HTTP API: Ease of Integration

  • Latency: Sub-second delivery initiation latency.
  • Throughput: Ideal for burst traffic (e.g., OTPs, notifications).
  • Security: HTTPS, Rate Limiting, and TLS/SSL encryption.
  • Use Case: CRMs, web apps, single-request integrations.
300+

Messages Per Second (Typical Max Burst)


~100ms

Average Gateway Latency

SMPP: High Volume & Low Latency

  • Latency: Minimal protocol overhead, fastest possible delivery.
  • Throughput: Dedicated persistent connection for extreme volumes.
  • Security: Optional VPN/IP whitelisting for enhanced security.
  • Use Case: Telcos, financial institutions, enterprise systems requiring 100% uptime.
1000+

Messages Per Second (Guaranteed Capacity)


~30ms

Average Gateway Latency

Robust & Developer-Friendly SMS Integration

Developers, we speak your language. Our accessible, well-documented RESTful API allows you to integrate our SMS Gateway into any platform in minutes, not days.

SDK Support

Get started faster with pre-built SDKs for the most common languages, simplifying your SMS integration across any tech stack.

PHP Python Java Node.js C#

Secure Authentication

  • ✓ API Key Authentication
  • ✓ IP Whitelisting
  • ✓ TLS/SSL Encryption
// Send an SMS with Celcom Africa's REST API
const url = 'https://api.celcomafrica.com/v1/send';
const apiKey = 'YOUR_API_KEY_HERE';

const sendSMS = async () => {
  const response = await fetch(url, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'Authorization': 'Bearer ' + apiKey
    },
    body: JSON.stringify({
      from: 'CELCOM',
      to: '+2547XXXXXXXX',
      message: 'Hello from the best bulk sms provider in kenya!'
    })
  });

  const data = await response.json();
  console.log(data);
};

Asynchronous Handling & Reliability (Webhooks)

Achieve true system reliability. We deliver Delivery Receipts (DLRs) and Mobile Originated (MO) messages asynchronously via secure Webhooks, ensuring you get immediate status updates without polling delays.

Delivery Receipt (DLR) Payload Example

{
  "messageId": "CLMA_XYZ123",
  "status": "DELIVERED",
  "recipient": "+2547XXXXXXXX",
  "status_code": 0,
  "timestamp": 1731945600
}

Our system automatically retries DLR posts for up to 72 hours, guaranteeing receipt integrity.

Advanced Error Handling Logic

Integrate our standardized error codes to implement robust business logic, such as automatic failover or refund processing.

  • Code 101: Temporary Network Failure (Retry Recommended).
  • Code 403: Invalid Sender ID (Registration Required).
  • Code 502: Destination Blacklisted (Non-Recoverable).
  • Code 0: Message Successfully Delivered.

Why We Are the Best Bulk SMS Provider in Kenya

Trusted by banks, government agencies, and major enterprises across Kenya for reliable, secure, and scalable messaging solutions.

🌍

Local Expertise

Deep understanding of Kenyan network protocols and regulations, ensuring compliance and high deliverability.

🎧

24/7 Developer Support

Dedicated technical support ready to assist Developers and businesses with any integration or delivery challenge.

💲

Competitive Pricing

Affordable rates for high-quality bulk sms in kenya, offering the best value in the market. No hidden fees.

🛡️

Trusted Platform

We are the preferred partner for banks, government agencies, and major enterprises who trust us with their critical communications.

Ready to Transform Your Communication?

Get started with Celcom Africa today and experience the difference a truly dedicated and powerful bulk sms solution can make for your business.