Best SMS API in the USA that helps you improve your customer experience.

Send and receive texts in the USA and globally with the most easy-to-use SMS API.
Why pay more for SMS? See SMS Pricing

Send mission-critical messages with confidence.

Send mission-critical messages with confidence

Reach users at scale wherever they are in the world, with triggered SMS alerts to keep them informed when it counts. Augment existing communications with AI chatbots, automating the most repetitive tasks to reduce operational strain. And, engage in text conversations to solve customer problems faster.

SMS built for developers.

  • Carrier complexities? Handled.
    Choose from local and toll-free numbers, short code, or alphanumeric sender ID. Telnyx offers a deep number inventory and compliant global communications.
  • Faster go-to-market
    Integrate messaging into your application faster than ever, with comprehensive API reference docs and SDKs in your preferred language.
  • Unmatched delivery insight
    Our carrier-grade features provide enhanced deliverability and more granular reporting—giving you detailed, real time insight into message delivery.

Deliver SMS in the USA and globally with powerful features.

Numbers on demand

Global reach
Instantly provision numbers to text globally.

Toll-free SMS
Send SMS updates from branded, memorable numbers.

Short code SMS
High-volume, high throughput texting.

Send and receive MMS and SMS on the same number.

Alphanumeric sender ID
Increase open rates with a custom sender ID.

Smart content handling

Support for any character set
Every language and emoji.

Long message concatenation
We'll automatically concatenate your long messages.

MMS rich-media support
Send and receive images, gifs or videos.

Opt-out management
Telnyx automatically handles standard opt-out replies.

Message queuing
Automatic queueing to send texts at a compliant rate.

Better deliverability

Number Pool
Spread message delivery across a group of numbers.

Area-code Geomatch
Send texts from the same area code as the recipient.

Sticky Sender
Send every message to a user from the same number.

Number Lookup
Split landline and mobile numbers programmatically.

Delivery reports
Real-time delivery notification of texts sent globally.

Create the experience you want.

With comprehensive API reference docs, SDKs and guides in your language.
  • SMS notifications

    Integrate two-way texting to manage all your customer inquiries, rescheduling and critical updates, all from your office phone number.

  • Text appointment reminders

    Empower patients or customers to manage appointments through two-way SMS prompts to reduce no-shows.

  • Two Factor Authentication

    Build a custom experience, using secure SMS codes to verify user account credentials and keep your data safe.

  • SMS marketing

    Automate customer retention and prospect marketing efforts with dynamic campaigns based on custom audience segmentation.

Messaging that delivers.

Enterprise-grade reliability, security and compliance at global scale.
  • Reach anyone, anywhere

    Get a message to anyone, anywhere in the world. Choose from local and toll-free numbers, short code, alphanumeric sender ID, or even use your existing voice numbers.

  • Worry-free compliance

    Telnyx is a licensed carrier in 25+ countries, and we can confidently say we’re fully compliant in everything we do. So, your communications are in safe hands.

  • Support you can count on

    Our best-in-class 24/7 NOC support is available by phone and email for every single customer with no spend requirements, so your issues never need to wait until Monday.

  • No-middleman pricing

    Telnyx maintains complete control over our network and phone numbers, so we’re able to cut out the middlemen our competitors depend on—avoiding costly markups.

Ready to get started?

Try it Free

Questions on setup? Talk to our experts

What kinds of SMS can you send with Telnyx?

Telnyx offers toll-free, long code and short code SMS, plus MMS. Sign up for a free account to read our developer docs about which SMS type fits your use case best.

What is the difference between P2P and A2P messaging?

P2P and A2P are two types of messaging traffic used for different purposes. P2P, or Person-to-Person, are typically used for low volume exchanges between individuals. A2P, or Application-to-Person, work similarly to short codes to send mass marketing messages, and tend to be used between companies and individuals.

How do I get a USA phone number online with Telnyx?

Existing customers can search, purchase, and provision SMS-capable US long codes in minutes via the Mission Control Portal. If you’re new to Telnyx, sign up and get started with a free account here.

What kinds of numbers are available in Telnyx’s database of phone numbers?

We have an extensive number inventory for SMS and MMS enabled long code and toll-free numbers that are instantly provisioned to you, and you can also request short codes through Telnyx. Search for numbers via our Mission Control Portal or API.

Can I send SMS internationally from the United States?

Yes! We offer international two-way person-to-person SMS using US long codes.

How much does it cost to send international SMS?

International SMS pricing depends on the network that serves the message destination. You can see the complete pricing list here.

Are there SMS regulations in the United States and globally?

Yes. SMS regulations help protect consumers from unwanted spam, aim to reduce damage from data breaches, and outline how businesses can use their customers’ phone numbers. These limitations and consumer data privacy laws can be difficult to keep track of, and staying compliant with these regulations is essential to avoid costly fines. Luckily, Telnyx has made it easier to navigate these waters with our SMS Regulations eBook, which you can download for free here.

Does Telnyx have SMS Opt-Out Keywords and Stop Words?

Yes, Telnyx automatically processes incoming messages to recognize stop words such as “STOP” and “UNSUBSCRIBE.” These numbers are then automatically placed on an opt-out list to prevent messages being sent in the future. You can read more about Opt-Out and the complete list of Telnyx’s stop words, here.

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