SMS API LP – Esendex USA

The SMS API Engineered for Reliability, Built for Scale.

Your developers get a clean, powerful API they’ll love. Your business gets the strategic partnership and compliance expertise needed to launch faster and drive results. Stop compromising and start building with an API that delivers on all fronts.

Trusted by industry leaders to deliver world class mobile messaging solutions

Mission-Critical Messaging APIs. Strategic Business Results.

Engineered for developers who demand reliability and trusted by product leaders who require results. We deliver on both. Stop compromising between a powerful API and a strategic partner. Get the enterprise-grade performance you need to build with confidence and the expert guidance required to scale without limits.

Engineered for Uncompromising Reliability

Your notifications are mission-critical. Whether it’s a two-factor authentication code, a fraud alert, or a time-sensitive delivery update, failure isn’t an option. Our platform is built for the scale and resilience your application demands, ensuring your messages get through instantly, every time. Protect your revenue and your reputation with an API you can trust.

Human Expertise, Reimagined for Your Roadmap

Stop waiting for answers. Our support is designed for the speed of modern development. When you have a question, you get a real human who speaks your language—not just a ticket number. For business leaders, our hands-on compliance experts demystify the 10DLC registration process, ensuring your campaigns launch on time and your messages stay delivered.

Launch Faster. Drive Real Engagement.

Your roadmap shouldn’t be held hostage by a complex communications API. We provide clean, well-documented APIs and SDKs that let your team integrate rich, two-way messaging in a fraction of the time. Focus on building incredible user experiences that drive conversion and loyalty, not on fighting with your integration.

Escape 10dHELLc.

Don’t let complex carrier registration derail your roadmap. Our hands-on compliance experts turn the industry’s biggest headache into a simple, guided process, ensuring your campaigns get approved and your messages get delivered. We provide the strategic guidance to navigate the maze of 10DLC, so you can focus on building—not bureaucracy—and ship on time.

Start sending messages today

Discover the full power of our mobile messaging platform

What our clients say

Increased engagement by 59%

“Esendex has been an invaluable partner to us. With a robust platform, high deliverability rates, compliance expertise and reliable support, the Esendex team has been key to our competitiveness in an increasingly complex space.”

18% Increase in customer payments

Streamlining processes, simplifying customer orders, managing payments, tracking orders and sending timely customer communications is critical to improving operational efficiency and enhancing customer care. The Esendex solution is now a key element of our technical solution.

Reduced missed appointments by 42%

I’m a relationship person, and everything we do hinges on that. Our relationship with Esendex goes back over twenty years and is about more than the technology they offer or pricing. I look for partners who are receptive to our ideas and can respond and adapt quickly to changes in the market.

Get expert guidance

Let us know what you need, and we’ll guide you toward the perfect solution.

With extensive industry experience, we’re here to help you navigate the complexities of US business communications. From 10 DLC registration assistance and regulatory insights to technical support and scalable messaging rollouts, we’re equipped to deliver the expertise you require.

What it’s like to partner with us:

Leverage 20+ years of experience
Get industry-leading support
Ensure compliance
Discover flexible, scalable solutions
Partnerships with major networks

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Unlock the full potential of communication with the Esendex API suite

Leverage robust SMS and MMS APIs, supercharged with data verification and voice services to deliver unmatched impact.

SMS and MMS

Connect with anyone, anywhere in seconds—grow your outreach through Short Message Service and Multimedia Messaging Service

Voice API

Easily make and manage phone calls and establish an automated response flow for inbound calls.

US Postal Address Verification

Guarantee package or mail delivery to your recipients, saving resources and avoiding failed attempts.

US Phone Verification

Amplify campaigns and cut costs by standardizing and verifying phone numbers.