Top 8 Leadings SMS Enterprise Providers

Our 2024 best bulk SMS API providers for 2024 are:

  • TrueDialog – Premier Enterprise SMS Gateway with robust features.
  • ClickSend – Cost-effective solutions with easy setup.
  • Vonage – Renowned for comprehensive documentation and enterprise support.
  • MessageBird – Streamlined integration and reliable enterprise support.
  • Clickatell –Transparency in resource allocation for enterprise needs.
  • Trumpia – Advanced SMS marketing features for enterprises.
  • BulkSMS – Ideal for enterprises starting with SMS campaigns.

SMS Provider Reviewed

Overall rating
Price (out of 5) 5 4.8 4.5 4 2
Tools (out of 5) 5 4.4 4.5 3.5 4
Trust (out of 5) 4.5 4.2 4 4 4
Customer service (out of 5) 4.5 4.8 3 5 3.5
Years founded 2008 2019 2010 2006 2006
Listed or Private company Private Private Private Private Private
Head Office Austin, Texas Salt Lake City, Utah New Jersey, USA California, USA Perth, Australia


Price per smsTrueDialogNotifyreVonageTrumpiaClickSend
  • Custom
  • 250K
  • 125K
  • 15K
  • 1K
  • $0.0093 per SMS



Payment mode Pay-as-you-go, Pre-Pay Pay-as-you-go, Pre-Pay Prepaid & Invoice Monthly Plan, Pre-Pay Prepaid & Invoice
Price match
Set up fees
Monthly fees
Payment methods Pay-as-you-go, Pre-Pay Pay-as-you-go, Pre-Pay N/A Monthly Plan, Pre-Pay Credit Card or Direct Debit
Payment mode Prepaid & Invoice Prepaid & Invoice Prepaid & Invoice Credit card or direct debit Prepaid & Invoice
Price match
Set up fees
Monthly fees

SMS Functions

API for Developers
The Vonage API Platform
Software needed
SMS Gateway
2-Way SMS
Email to SMS
Carriers American & Overseas American & Overseas Global Global American & Overseas
Dedicated number
Inbound SMS
Money back guarantee


Global coverage
Gateway uptime 99.99% 99.9% 99.99% N/A 100%
SLA guarantee
Spam compliant
Security and Privacy policy

Customer care service

Free trial
50 Free SMS
Phone support
Email support
Support hours 9am - 5pm 8am - 5pm 24/7 24/7 24/7
Reviews 4.8 - 15 Reviews Trustpilot = 2.3/5 - ‎7 reviews 4.3/5 - ‎51 Reviews Trustpilot = 4.4/5 - 876 reviews


Overall rating 9.6 9.8 8 8 6.6
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TrueDialog Is America’s Top Enterprise SMS API Provider

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We have compared leading Enterprise SMS API providers in the US and have decided that TrueDialog takes the title of best enterprise SMS API provider in 2024, this being because:

  • Best Value Enterprise SMS API pricing starting from $0.007 per SMS for 5M messages (volume pricing)
  • Enterprise-grade SMS API suitable for businesses of any size
  • 99.99% Uptime SLA Guarantee
  • Strong direct carrier relationships (AT&T, T-Mobile, Verizon)
  • Payment is available through invoicing, pay-as-you-go or subscription-based
  • Highly efficient as enterprise SMS can be sent with a single API call (lower broadband load)

TrueDialog Review >>Visit TrueDialog >>

Our Rating

The overall rating is based on review by our experts

Value For Money
10 / 10
9 / 10
9 / 10
8 / 10
9 / 10
Customer Service
9 / 10

What Are Enterprise SMS Gateway APIs?

Enterprise SMS Gateway APIs are sophisticated interfaces designed specifically for large-scale businesses to facilitate the seamless transmission of bulk SMS messages. These APIs allow enterprises to integrate SMS messaging capabilities directly into their existing software systems, such as Customer Relationship Management (CRM) systems, Enterprise Resource Planning (ERP) systems, or any custom business applications. Here’s a detailed breakdown of what they encompass:

Core Features of Enterprise SMS Gateway APIs:

  1. High Volume Capacity: They are engineered to handle a massive volume of text messages, enabling businesses to send thousands or even millions of SMS messages simultaneously, which is crucial for marketing campaigns, alerts, notifications, and operational communications.
  2. Robust Integration: Enterprise-grade APIs provide extensive integration capabilities, allowing seamless communication between the enterprise’s backend systems and the SMS gateway. This ensures that SMS functionalities can be embedded directly into existing business workflows and applications.
  3. Global Reach: They often support international messaging, enabling enterprises to reach customers worldwide without the need for multiple vendors or complicated routing setups, ensuring consistent message delivery across different carriers and countries.
  4. Advanced Security: Security is paramount, with features like end-to-end encryption, secure access controls, and compliance with data protection regulations (such as GDPR) to safeguard sensitive information and maintain customer trust.
  5. Reliability and Scalability: These APIs are built on reliable infrastructure with high uptime guarantees, ensuring message delivery without delays. They can scale dynamically based on the business’s needs, accommodating fluctuations in messaging volume without compromising performance.
  6. Two-Way Messaging: They often support two-way SMS, allowing businesses not just to send messages but also to receive replies from customers, enabling interactive conversations, customer support, feedback collection, and engagement.
  7. Detailed Reporting and Analytics: Provides comprehensive analytics and reporting features, enabling businesses to track delivery rates, engagement metrics, and the effectiveness of SMS campaigns, facilitating data-driven decisions.
  8. Customization and Control: Enterprises can tailor the messaging experience according to their needs, including custom sender IDs, message templates, and automated triggers for sending messages based on specific events or actions.

Importance for Enterprises:

  • Enhanced Customer Engagement: Enables personalized communication with customers, offering timely updates, support, and promotional content directly to their mobile phones.
  • Operational Efficiency: Automates various communication processes, such as appointment reminders, service notifications, and internal alerts, thereby reducing manual workload and enhancing operational efficiency.
  • Critical Alerts: Essential for disseminating urgent or critical information swiftly, ensuring that important alerts are received and acknowledged promptly.
  • Marketing and Promotions: Powerful tool for executing marketing campaigns, promotional offers, or event notifications, directly contributing to customer acquisition and retention strategies.

Enterprise SMS Gateway APIs are integral for businesses that require reliable, scalable, and secure messaging capabilities. They provide the technological framework to communicate effectively with customers, streamline operations, and leverage SMS as a powerful channel for direct engagement.

any integrated with bulk SMS service) is a platform, software, or UI that a business can use to create mass text message capacity through an API that enables SMS integration with their existing CRM or e-commerce platforms.

Utilizing and integrating an API (application programming interface) gives businesses an extra layer of marketing capability through real-time bulk SMS messages.

Rest API allows for two computer platforms, such as an SMS Gateway and an e-commerce or CRM platform to speak to each other with a secure sender ID. Using a dedicated short code phone number, businesses can send and receive SMS communication easily and at scale. Two-way SMS allows businesses and their users, customers, or subscribers to communicate in real time.

With dedicated direct carriers and delivery reports, businesses can feel confident that their communications and data are handled, executed, and delivered securely across mobile networks with for example two-factor authentication and encrypted API Keys.

Sending Text Messages In Bulk

A Bulk SMS API lets a business expand its SMS Marketing and SMS campaigns with a simple (often available out of the box with ample documentation and tutorials) integration to many of the most common digital marketing platforms. With SMS having the highest open rates in digital communication, it is no surprise that bulk text messages have become a key component in many businesses’ SMS delivery workflow.

Utilizing bulk messaging APIs as an SMS solution is a great way for businesses to reach customers and users with marketing messages, appointment reminders, OTP, and notifications “where they are” – regardless of content type, mobile phone type, and operating system.


Best Enterprise API To Bulk Send SMS Messages With:

The best Bulk SMS Providers are the ones that offer unique selling points, such as WhatsApp Integration, or custom long code and short code mobile numbers.

This is where TrueDialog excels, as their unique SMS Platform utilizes some fantastic custom solutions to send SMS text messages with API easily, cheaply, securely, and reliably.

The best bulk SMS API would be one that requires no software downloads and installs and connects seamlessly between SMS Gateway and business platforms.

Ideally, from a business’s POV, the best SMS API Provider is one where all you need is a web browser or Mobile App, internet access, and a contact list.

Some of the most valuable features of a Bulk SMS APIs are:

  • Fast and capable to deliver at scale without timeout
  • Easily integrated
  • Secured with encryption encoding
  • Business continuity
  • Use of SMTP, HTTP, SMPP, SDKs, WSDL, and returnTransfer protocols
  • Automation capabilities (scheduling etc.)
  • Scalability (Bulk SMS capacity and volume pricing)

Comparing Bulk SMS API Providers is a critical part of SMS Marketing as it allows businesses to make an informed decision and get the best deal on price and features. See all our SMS Provider comparisons below.

Full SMS Providers List

Bulk SMS API Use Cases

Bulk SMS service is an SMS Functionality where text messages are distributed in large quantities for the purpose of marketing or advertising. Bulk SMS has been used by businesses since the dawn of SMS marketing, but is still seeing high levels of use.

Its popularity comes from the enormous reach and high open rates of SMS marketing. Bulk SMS APIs are generally used alongside a business’ SMS service provider to send our customer communication at scale, as a channel for customer engagement for businesses to connect customers to their brands.

Some business use cases of Bulk SMS services are:

Marketing Campaigns: Bulk SMS marketing is a highly efficient channel for marketing in present times. It’s cheap, easy to use, and has high open rates and customer engagement. SMS marketing can be used by businesses of any size.

Verifications: With cybersecurity being a growing issue in the world, verification via SMS is one of the easiest and most secure ways for businesses and customers to confirm data. Bulk SMS speeds the process up with the help of OTP, 2FA, and Short Links to allow customers and users to verify their identities via SMS.

Sending Alerts: SMS alerts are reminders that help consumers keep track of tasks and appointments, and can be sent as confirmations or ahead of a date to act as a reminder or confirmation system. Businesses in logistics, travel, e-commerce, and the health sectors use SMS alerts as a means of confirmation and reminder.

Latest offers: Bulk SMS can also be used to keep your customers updated on your offerings and services. It provides customers with up-to-date information about offers, discounts, vouchers, and sales as well as other important information. This helps with customer engagement, return customers, and brand loyalty.

Surveys and Feedback: Every business relies on feedback as a means to improve its offerings and connect with customers. Bulk SMS is a great way to send out survey links and request feedback, saving time and resources while collecting valuable data.


Short Code Numbers VS. Toll-Free Numbers

Short Code numbers are telephone numbers with five to six digits, used to send and receive SMS or MMS messages to and from mobile phones. Short codes are capable of sending higher volumes of SMS compared to Long code numbers, and wireless carriers audit each short code against its intended use. This is a registration process that costs around $44 in the US.

Short code costs relate to the cost to lease a short code number, as well as the volume pricing from one’s SMS Gateway provider. Short codes are best used for marketing communications, OTM notification bursts, alerts, and reminders.

Toll-Free Short Message Services (Toll-Free Numbers), on the other hand, is used to send SMS from an 8XX number. Toll-free numbers are useful to businesses as you can text-enable them, meaning that customers can use both voice (phone call) and SMS messaging to communicate with your business, allowing for a better user experience. Toll-free SMS numbers can however not be used for high-volume SMS marketing, such as Bulk SMS.

Enterprise SMS Gateway Pricing Overview for TrueDialog

TrueDialog’s Bulk SMS API is one of the most competitively priced ones in the market. With enterprise volume pricing models available to businesses of all sizes, TrueDialogs Bulk SMS API Prices are why they are one of the best providers in the vertical.

Claiming to offer up to 50% lower costs compared to competitors, its easy to see why TrueDialog is one of our favorite Bulk SMS Providers. TrueDialog’s Bulk SMS API Costs differ slightly based on your business needs, but generally reflect the below:

Long Code Pricing (Inbound and Outbound SMS Messages Per Month)

First 5 million messages come out to $0.00700 per message ($7.00 per 1,000 messages)
Next 20 million costs around $0.00500 per message ($5.00 per 1,000 messages)
Next 75 million costs ~$0.00300 per message $3.00 per 1,000 messages)
Next 150 million is priced at $0.00200 per message, coming to $2.00 for 1,000 messages.

Beyond that, you would need to contact TrueDialog to discuss pricing.


TrueDialog’s Long Code Bulk SMS API Pricing

Long code Bulk SMS API is priced on A2P 10DLC System registration fees and per-message carrier fees amongst other factors. This is not factored into the prices and is charged in addition to TrueDialog’s standard fees.

The A2P Standard Brand registration fee in the USA costs around $44 as a one-time registration fee.

Carrier Fees differ based on carrier and are subject to change, but you can get an overview of Bulk SMS API Direct Carrier Fees on TrueDialog’s site.

TrueDialog’s Short Code Bulk SMS API Pricing(Monthly Inbound SMS Messages)

  • First 500K messages cost $0.0700/message ($7.00 per 1,000 messages)
  • Next 4.5 million cost $0.0500/message ($5.00 per 1,000 messages)
  • Next 20 million come in at $0.00400/message ($3.00 per 1,000 messages)
  • Next 75 million are priced at $0.00200/message ($2.00 per 1,000 messages)

Again, direct carrier fees for shortcodes depend on the carrier.

TrueDialog’s enterprise-grade volume pricing system sets them apart from competitors, as any business size; enterprise, large or small can find a plan that suits their needs and get the best Bulk SMS API prices and features in the market.

Visit TrueDialog >>

Bulk SMS API Pricing
1.98 1.47 1.19 0.99
2.47 1.77 1.20 0.89
3.65 3.35 3.21 3.21
0.79 0.79 0.79 0.79
6.90 6.90 6.90 6.90
6.00 3.50 1.90 1.90
5.90 2.99 2.70 2.40
3.20 3.20 3.20 3.20
1.90 1.50 1.00 1.00
2.93 2.93 2.93 2.93
4.75 2.20 2.10 1.70
4.00 2.90 2.10 2.00
6.00 3.95 3.86 3.86
7.40 1.99 1.99 1.99
4.90 3.50 2.50 2.50

Current is in $$$


Bulk SMS API Features

The best Bulk SMS API Providers are those who offer unique features at competitive prices. SMS API and SMS Communication has been around for years, so providers need to offer unique value to stand out. The reason why TrueDialog remains a leading Bulk SMS API Provider is because of its unique out-of-the-box features:

  • iOS and Android app with integration capability to control text message campaigns on the go.
  • SMS Automation features that are controlled by their powerful scheduling engine, good for reminders and time-sensitive marketing campaigns.
  • Integration with a wide range of CRM systems such as; Microsoft Dynamics, Eloqua, Social Messaging Apps, Marketo, Salesforce, Five9, and Hubspot.
  • Full documentation, tutorials, and 24/7 customer support.
  • Direct carrier connections with a 99.8% SLA guarantee.
  • Unique campaign endpoints make TrueDialog uniquely efficient as businesses can send millions of messages using a single API call, which saves broadband load and time.
  • Custom Dual Opt-Out database hosted in an ISO 9001 Cloud Database to ensure that Opt-outs are tracked and logged correctly to avoid texting a customer who has opted out.
  • Built-in drill-down reporting to maximize insights and build custom drill-down reports with custom metrics.

Visit Website >>


Bulk SMS API Reliability And Support

TrueDialog has one of the best SLAs in the vertical with a 99.99% uptime guarantee.

With their unique campaign endpoints, mass SMS communication can be done with a single API call to lower broadband strain, further ensuring reliable speeds and uptime.  TrueDialog’s customer support goes far beyond simple troubleshooting.

TrueDialog has a wide range of documentation, and tutorials as well as a live chat option. Their support is 24/7, but most customers hear back within an hour of placing a support query (within business hours).

They also state that you are always welcome at their headquarters in Austin, Texas for an in-person review and consultation.


TrueDialog’s 99.99% Uptime Guarantee Is Why Businesses Of All Sizes Choose Them For Their Bulk SMS API needs.


Contact TrueDialog >>

How Can US Businesses integrate An Bulk SMS API?

Using an SMS API for large-scale SMS communication is the easiest way to ensure that SMS marketing gets carried out cheaply and at scale. With SMS API, developers and IT teams are able to connect SMS Gateway providers to send and receive SMS through Bulk SMS API integration. APIs can be connected using coding languages such as PHP, SMPP, SOAP, JAVA and REST API.

Each Bulk SMS API Provider will usually provide full instructions, tutorials and documentation to ensure that API integration is as easy as possible. Providers such as TrueDialog will also offer dedicated account managers at certain tiers, 24/7 support, SDKs, and free trials.

The use of a Bulk SMS API starts with the company providing the Bulk SMS Gateway API providing encrypted sample code for the business to use to integrate the API using SOAP (simple object access protocol). The connection occurs via one of many API programming languages, and developers can use Java, GitHub, C3, Bash, Ruby, Python, PHP, Powershell, C++, or JSON to connect the API to their platform.

Why Choose TrueDialog’s Bulk SMS API?

SMS API integration with TrueDialog is easy and popular:

  • Low Bulk SMS API Costs: TrueDialog offers some of the cheapest prices, up to -50% compared to competitors.
  • Direct Carrier Relationships: TrueDialog has built strong relationships with direct carriers to cut out extra processes and supply direct carrier Bulk SMS API capability.
  • Bulk Text Messaging: With one of the most extensive libraries of documentation, FAQs and tutorials, integration with the most popular CRM and e-commerce platforms is easy and fast.
  • Two-Way SMS: Customers can respond to SMS messages (on American networks), which increases customer engagement and allows for feedback.
  • Delivery Receipts: Businesses can track text messages and notifications delivery receipts, allowing for valuable data on time to open, no-opens, and more.

Visit TrueDialog >>


SMS API Frequently Asked Questions

An SMS enterprise gateway API allows simple query parameters via URLs that provide SMS gateway instructions to send and receive sms. This can be enabled through scripting language such as PHP that can be integrated to web forms and other applications.

While it differs from business to business and even across industries, commonly it is agreed that the main factors to look at when researching and comparing Bulk SMS API are:

  • Cost – Value for money and scalable SMS messaging and integration
  • Speed and Reliability – Can the API deliver SMS quickly, without data loss, and at large scales?
  • Integration Difficulty – How difficult is it to download, install, log in, or signup for an SMS Gateway API?
  • Integration Capacity– Can the API connect to your platforms of choice without the need for workarounds?

Our list of top Bulk SMS Enterprise API Providers (in no particular order):

  • TrueDialog
  • Notifyre
  • Vonage
  • MessageBird
  • ClickSend
  • ClickaTell
  • Trumpia
  • BulkSMS


About Our SMS Enterprise Gateway API Comparison Page

Our Bulk SMS API page compares the top 8 best SMS API Gateway providers in the USA in 2024. The information is sourced from provider websites, thus data is subject to change, we recommended you always verify the information with the provider. If you find any incorrect information, please contact us using our contact form, and we will amend it immediately. Our mission at SMS comparison is to assist American businesses in choosing the right SMS Provider for their needs.

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