Deliver critical messages instantly with enterprise-grade reliability

SMS remains one of the most trusted, direct, and universally accessible communication channels - reaching any mobile device, anywhere, without requiring internet access. With Unecast’s SMS & SMPP API, your business can send fast, secure, and scalable messages your customers rely on.

01. What we offer

Reliable, High-Speed Delivery

Reach customers instantly with carrier-grade SMS and SMPP infrastructure designed for mission-critical alerts, OTPs, and notifications.

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02. What we offer

Simple Integration, High Performance

Connect effortlessly through REST API or SMPP 3.4 and scale to millions of messages with real-time delivery reports.

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03. What we offer

Global Reach with Local Compliance

Deliver messages anywhere in the world while we handle sender ID approvals, regulatory requirements, and intelligent routing for maximum success rates.

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Why SMS?

SMS remains the most reliable and universally accessible communication channel, delivering critical messages instantly - even without internet access. It’s fast, trusted, and reaches every mobile device, making it ideal for OTPs, alerts, reminders, and time-sensitive updates.

Instant Reach, Anytime, Anywhere

SMS delivers your message instantly to any mobile phone - no apps, data, or smartphones required.

Unmatched Open Rates

With over 98% open rates, SMS ensures your critical alerts, OTPs, and reminders are seen within seconds.

Universal Compatibility

Every device supports SMS, making it the most reliable communication channel across all customer segments.

Perfect for Mission-Critical Use Cases

From banking alerts to login OTPs and emergency notifications, SMS remains the fastest and most trusted option.

Works Even in Low Connectivity

Unlike app-based channels, SMS performs flawlessly in areas with weak or no internet coverage.

Cost-Effective at Scale

SMS offers an affordable way to reach large audiences with high delivery reliability, making it ideal for both transactional and bulk communication.

Frequently asked questions:

What is an SMS gateway?
An SMS gateway is a service that allows businesses to send and receive SMS messages through an API, SMPP connection, or platform without using a mobile device.
What is SMPP and when should I use it?
SMPP (Short Message Peer-to-Peer) is a high-speed protocol ideal for businesses that need to send large volumes of SMS quickly and efficiently.
How does an SMS gateway work?
It connects your application or system to mobile network operators, enabling automated SMS delivery through secure telecom routes.
Can I send SMS internationally?
Yes. Most SMS gateways support global routing so you can send messages to customers in any country.
What is a Sender ID?
A Sender ID is the display name customers see when they receive your SMS. It can be alphanumeric (e.g., UNECAST) depending on country regulations.
What is the maximum SMS character limit?
A standard SMS supports 160 GSM characters. Longer messages are split into multiple segments and reassembled on the recipient’s device.
Is SMS reliable for OTPs and critical alerts?
Yes. SMS is one of the most reliable channels for OTPs, banking notifications, and time-sensitive alerts due to high delivery success rates.
How does Unecast support SMS gateway integration?
Unecast provides easy REST API documentation, SMPP credentials, sandbox testing, sender ID approval support, and end-to-end technical onboarding.

What Our Clients Said About Unecast:

"One of the best partners we've worked with. Their messaging interface is incredibly user-friendly, and the customer service response is quick and proactive. The ideal partner for a global campaign solution."

Yohan Philip

Marketing - PepperStreet (Private) Ltd.

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