Engage Your Customers with The Confidence & Reliability Only Found in CDYNE Communication API's & Software

CDYNE offers reliable and flexible SMS APIs, voice broadcasting, SMS broadcasting, an SMS reseller program, phone number verification and address verification API's that are easy to integrate and scale for your business.

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See why the largest Financial and Healthcare companies prefer CDYNE's communication APIs.

Trusted Communication API Provider

CDYNE's Communication APIs are Trusted by Some of The Biggest Brands in The World Since 1999 - ABOUT US

You Can Support Any Channel with Our Communication APIs & Software

SMS API

Programmable SMS API

Text message API designed to send & receive SMS & MMS globally using a short code or 10DLC phone number.

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SMS Software

No Programming Needed

Easy to use texting software that can send & receive SMS & MMS using a short code or 10DLC phone number.

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Voice Broadcast

Programmable Voice API

Powerful voice broadcast service that sends mass automated phone calls quickly to mobile & landline devices.

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Ringless Voicemail

Voicemail Drop Software

Non-intrusive voicemail marketing software that drops your unique message into your contacts' inboxes.

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Phone Verification

Phone Verification API

Verify cellphone and landline numbers, find service providers, and define time zones to restrict calling times.

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Address Verification

Robust Address API

Quickly and easily verify, standardize, and correct bulk addresses in the United States and Canada.

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A man sitting at his desk programming his application with an SMS API

. Trending Topics for SMS

What Does Opt Mean in The Text Messaging Industry?

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Enjoy Our New API Comprehensive Guides

Our beginner's guides to using a programmable SMS & voice API to help you succeed in building your companies website, application, CRM, and more.

SMS API Guide

A free SMS API resource to help you better understand how to use a programmable SMS API within your business.

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Voice API Guide

A free voice API resource to help you better understand how to use a programmable voice API within your business.

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What Our Customers Have to Say

We’ve been rated 5 out 5 stars on Capterra, GetApp, Google and Facebook – based on 40+ reviews.

We use SMS Notify as part of our applicant tracking system to correspond with our potential applicants. We use the API to text straight from the applicant's file and the entire team can pick up a conversation at any time so we don't miss a beat even when someone is out of the office.

Bobbi L.

Recruiting Supervisor

Used the software for: 2+ years

This is a great, fast, reliable, and cost-effective solution for sending out SMS messages to clients/users of my automated call-answering service.

Chisolm W.

Computer Software, Self-employed

Used the software for: 2 years

Product is super easy to use and the Cdyne Wiki is very helpful. I like that we get constant updates on any maintenances and updates when any delays have been resolved. Uptime is also great.

Randy T.

Software Engineer II

Used the software for: 2+ years

SMS Notify! is easy to use and set up. No special hardware or software knowledge needed to quickly and easily integrate into the software we use for password manage 2FA.

Doran B.

Sr Infrastructure Engineer

Used the software for: 2+ years

SMS Notify is very easy to configure and the admin console is very easy to navigate through.

Brett C.

Director of Global IT

Used the software for: 2+ years

Works as advertised. Users are getting texts and the reports available help track down any issues

John B.

Project Coordinator

Used the software for: 6-12 months

Explore Our Latest Blog Topics

4 people eating at a table texting on their cellphones.

What Is Mass Texting & How Does It Work?

Businesses can utilize SMS marketing in a number of ways, such as through a long...

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A person holding their cellphone, doing sms marketing.

What Is SMS Marketing & Why Use It? A Complete Overview

SMS marketing is a term that's often thrown around...

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A man pondering about the difference between SMS and MMS.

SMS vs. MMS (What's the Difference)

Mobile phones have become a commodity. Today, people use cellular devices...

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