Top 10 SMS Gateway API Providers (2021 Edition)

SMS Gateway Providers

In the world of eCommerce, Klaviyo is a marketing automation tool. Customer acquisition, nurturing, and retention are all made easier with this solution’s comprehensive set of features.

Shoppers and their favourite brands can communicate instantly and in real time using Cartloop, a conversational text messaging platform that helps businesses build closer relationships with their customers while increasing revenue.

When it comes to email marketing and follow-up emails, ShopMagic is a WooCommerce plugin that assists you in growing your business through marketing automation by increasing conversions and client retention.

The question of how Cartloop compares to other platforms for conversational SMS marketing comes up frequently. Particularly competitive is the Klaviyo platform, which was launched in 2015. However, there are some significant differences between the two platforms in terms of what they are intended to do, where their strengths lie and where their weaknesses lie, as well as the ease with which you may experiment with them as well as the costs and features.Consequently, to assist you in answering your queries, we have conducted an in-depth examination of each platform to assist you in determining which one is most suited for your brand’s specific marketing goals, based on features, free trials, availability, cost and other factors.

Ultimately, we believe that Cartloop is the superior choice for organisations that desire to engage with shoppers in real time, at the exact moment when they require it the most, by employing a human-centered approach.

Using Klaviyo, brands and stores can automate their SMS and email marketing campaigns by putting everything on autopilot.In an omnichannel marketing strategy, Cartloop and Klaviyo are complementary to one another and can be quite effective.The text marketing tools we’re evaluating here are all focused solely on text marketing, but they take a variety of techniques and offer a variety of features — for example, Cartloop offers a completely managed service, while Klaviyo offers a self-service option.Because ShopMagic is a WooCommerce extension, you retain ownership and complete control over your customers’ and store’s data in perpetuity. Here are the elements that stick out when comparing Cartloop to Klaviyo and Shopmagic, as well as examples of how those features are put to use.

Shopmagic features:

  • Custom events, filters, actions, and placeholders can be created.
  • Sending emails with customised templates is possible.
  • Using other plugins and web applications to extend the functionality of your website.
  • Overriding the default plugin behaviour is possible with this setting.

Klaviyo features:

  • Email Marketing- Building and personalizing emails, sending outbound emails, manage email deliverability, automated email responses.
  • Online Marketing- landing pages and forms, dynamic content, A/ B testing, mobile optimized, search tracking and optimization.
  • Lead Management-Marketing Lead Database, Data Quality Management, Segmentation, Lead Scoring and Grading, Lead Nurturing, Online Behavior Tracking, Automated Alerts and Tasks, CRM Lead Integration
  • Campaign Management-Program Management, Event / Webinar Marketing, Calendaring, Budgeting
  • Reporting & Analytics- Web Analytics, ROI Analytics, Revenue Analytics, SEO / Keyword Analytics
  • Templates- Text and Themes, Proofing, Mobile Responsive
  • Text Messaging- Bulk SMS, Two-Way Text Messaging, Text Scheduler, Automatic Replies, Automatic URL Shortening, MMS Marketing, Personalization
  • SMS Platform-Reporting, Automation, API Integration

Cartloop Features:

  • Activity Dashboard- The data displayed on the Dashboard are related to Cartloop’s performance and include: total revenue, average order value, number of orders, conversion rate, and number of conversations. The Conversion Rate is the percentage of persons who made a purchase after clicking on a link in a text message.
  • Analytics/ROI Tracking– It helps in tracking the return of investment.
  • Auto-Responders- Engage in conversation with your clients. Make use of Cartloop’s Live SMS Concierge service, or respond to consumers directly from the chats inbox.
  • Campaign Analytics- Helps in campaign management, planning, scheduling, segmentation.
  • Channel Attribution- Allows in contextual targeting, conversion tracking, coupons available.
  • Customer Segmentation- Allowing your customers to believe they are one in a million is essential. A conversational approach to SMS advertisements can help your clients fall in love with your brand. Increase the number of subscribers who become lifetime customers by using a more human tone in your messages.
  • Deliverability and Compliance- Deliver every text message on time and in compliance with the law. To ensure the best level of deliverability, choose a dedicated local or toll-free phone number. Our team collaborates with prominent global carriers to develop guidelines and best practises that are relevant to their operations.
  • Engagement Tracking- Allows tracking traffic and performs event triggered actions.
  • Real Time Analytics- Real-time analytics, right down to the individual chat
  • It is essential to understand how your SMS marketing efforts are performing. View the results of conversation insights from the Cartloop dashboard, allowing you to make better business decisions.
  • Real Time Data and reporting is done through cartloop.
  • SMS Marketing- Conversations that are both engaging and conversion-oriented
  • Who loves bots in the first place? Conversational texts convert at a rate three times higher than one-way texts. Each step of the buying journey is enhanced by Cartloop’s Human Automation, which allows your audience to connect with your business on a more personal level.
  • Third Party Integrations- Cartloop also interfaces with customer service platforms such as Gorgias and Zendesk.
  • Visual Analytics is also done through cartloop.

Cartloop Pricing

Klaviyo Pricing

ShopMagic Pricing

Comparison between three platforms :

Cartloop Klaviyo Shopmagic
1 Working Mechanism Cartloop works with brands who want to engage with shoppers in real time, utilising actual people. Klaviyo works with businesses and retailers who want to put their SMS marketing on autopilot by utilising automated processes and workflows. The SMS segmentation tool allows you to combine filters in order to target your SMS messages more specifically. ShopMagic is an email marketing and follow-up emails plugin for WooCommerce that helps you grow your business with marketing automation by increasing conversions and retaining customers.
2 Control Cartloop is a managed service that provides complete control over its operations. Klaviyo is a platform that allows users to self-serve. Provides Follow up emails and marketing automation
3 24/7 Cart Recovery Experts Cartloop employs the best-in-class Experts that interact with consumers in real time, responding to their questions and concerns. Klaviyo sends out automated messages based on how clients respond to your SMS messages, using pre-built themes.
4 International Coverage In addition to the United States, Cartloop is currently available in Canada, Australia, and the United Kingdom, with new nations becoming available on a monthly basis. Klaviyo SMS is only available for phone numbers in the United States. Internationally available
5 Post-Purchase Flows Cartloop recovery Experts are trained to engage customers for upselling and cross-selling opportunities. As a result, they can provide relevant product recommendations to customers, just as if they were in a physical store asking for assistance. This feature is not available in Klaviyo. This feature is available
6 Real-Time Customer Insights Cartloop’s Experts have a conversation with the customers. They are able to obtain particular insight and comments directly from the clients because they are having real-time, actual discussions with them. They identify the most common reasons why shoppers abandon their shopping carts and then deliver that information straight to you, allowing you to make more informed decisions and optimise your business as a result. Customers might need support for below queries: Payment related questions
Technical issues with the website
Discount questions
Product related questions
Shipping time related questions
This feature is not available in Klaviyo.
7 Pricing policy Cartloop’s pricing mechanism is rather basic in its approach. they bill their clients according on the amount of revenue they earn. Klaviyo operates on a Pay as You Go (Pay as You Go) model. That is, you get charged based on the number of texts you send. The first 50 messages are completely free. After that, you can make additional deposits into your account to send additional messages. Personal
Billed yearly, cancel anytime
All 10 PRO add-ons
Unlimited Updates & Support for 1 Site
Premium 1-on-1 Support
All core features included,
Billed yearly, cancel anytime
All 10 PRO add-ons
Unlimited Updates & Support for 25 Sites
Priority 1-on-1 Support
All core features includedProfessional
8 Cart Reminders Cart reminders are issued 24 hours after a shopper has abandoned his cart and has not yet recovered it using our discount code or custom link to complete the transaction. Although Klaviyo is not a cart abandonment solution in and of itself, it does allow you to automatically send cart recovery letters to clients who have abandoned their shopping carts. You will be able to lessen cart abandonment as a result of this. This feature is available
9 Product Analytics This function allows you to gain a better understanding of which products perform the best and which products are the most popular among your clients. After that, you can reuse those products in post-purchase flows. Klaviyo provides this feature This feature is available
10 Custom URL With the Custom Short Url Subdomain feature in Cartloop, you may include your company’s name in the links, which will help to raise brand awareness, consumer trust, and click-through rates for your products. Klaviyo provides this feature This feature is available
11 1-Click Integration with Shopify It takes approximately 5 minutes to complete the integration. After that, you may save time and money by not having to spend hours designing workflows and automations because Cartloop is a fully managed service. Easily integrates with shopify Can be easily integrated with woocommerce and mailjet
12 14-Day Unlimited Free Trial During the 14-day free trial period, we will send you an unlimited number of SMS. The majority of our users get results within the first 24 hours of using our service. You can send 500 emails maximum to up to 250 contacts for free, or A free account also includes a complimentary phone number and up to 150 SMS messages, which you can use to reach up to 50 SMS contacts each month Core functionalities of ShopMagic are free forever. However, some add-ons which you can use to enhance your eCommerce possibilities are to be paid.

As businesses take on the technical landscape of today’s ever-evolving digital world, marketing teams are employing new tools to reach their customers. As a result, they see higher open rates, more conversions, and an increase in ROI. An SMS API coupled with an SMS Gateway enables you to easily integrate text messaging into your existing solution and offer customers a better experience.

Ask yourself, “How do I communicate most with my friends and family?” You most likely use text messages to reach the people closest in your life. Text messages allow you to engage in quick or lengthy conversations, no matter what the scenario is.

With text messages, you can take the time to craft out your messages and give thought to the idea you’re trying to portray to your recipient. Then, to show emotion, people can pop in an emoji to express how a given message makes them feel.

How many people do you know without a mobile phone? It’s undeniable that text messages are evolving the way we communicate with each other, and it makes absolute sense why businesses are seeing tremendous results.

So why not use the same channel that we use every day with our family, friends, and colleagues, but in a business setting? Think of the possibilities that SMS may yield for your business. If your company has 10 or 10,000 customers, the chances are that your users can benefit from fast and reliable messaging on the channel that they use most.

Start sending text messages now

You don’t need an API to send text messages; you can use Cloud Contact and skip all developer-geared API requirements. For example, on CCAI, all you need to do is create an account, upload contacts, and send messages – and best of all, it’s free and doesn’t require a credit card.

Let’s dive into some of the basics before we explore our top SMS API providers. If you wish to jump around, please do so by clicking on any of the links below in the accordion dialog below.

What is an SMS Gateway?

An SMS Gateway is a service that allows you to send and receive messages from a software interface to an SMS-compatible device, such as a mobile phone. The SMS gateway routes the text messages to the telecommunication networks through a Short Message Peer-to-Peer (SMPP) interface. The text messages are typically sent directly or via an aggregator that will then sell the text messages to various networks.

What is an SMS API?

In short, an SMS API (Short Message Service Application Programming Interface) is a type of API that enables you to send text messages from your computer. An SMS API is a software integration interface that allows code to send SMS messages via an SMS Gateway.

An SMS API can perform various tasks related to text messaging, such as automated text notifications, sending unique 2FA codes, and more.

How does a computer communicate with an SMS gateway?

The SMS API interacts with the gateway through a REST API, software application, or web page, where people can upload their contacts and send messages.

SMS Gateway Services for businesses

What kind of businesses use an SMS API?

An SMS API is a great way for businesses of diverse sizes and industries to streamline their customer communication. A few industries include:

  • Debt Collectors
  • Medical Facilities
  • Real Estate Agents
  • Schools
  • Banks
  • Travel Companies
  • Ecommerce
  • Dentists

Why should I use an SMS API?

An SMS API gives developers a quick yet effective way to send SMS messages by connecting to an SMS gateway, such as Twilio or Plivo. There are many advantages to leveraging an SMS API instead of other alternatives that we will uncover below.

If your business sends the same message regularly, you can use an SMS API to schedule messages at the exact time you want effortlessly. In addition, with an SMS API, you can easily automate responses when a user texts you with a specific keyword, making your workflows more efficient and productive.

An API allows you to track your messages with delivery receipts, which shows you exactly what time your message was delivered. This gives you direct insight into the messages that weren’t able to be sent.

An API gives you direct access to other service features that you can integrate into your own system. For example, you can choose how you would like to send and receive messages through email or push notifications.

Quick and reliable
When developers sync up with an SMS API, they benefit from great speed and reliability because the API interacts directly with the SMS gateway. The API will enable you to send thousands of messages in just seconds because of the secure connection with the SMS gateway.

An SMS API allows you to integrate SMS across your entire system while providing enhanced insight on a single-view interface.

Top SMS Gateway API Providers

After testing various SMS API providers, we came up with our top 7 choices. Each solution offers different services and features to enhance your SMS experience.

Twilio SMS Gateway API

1. Twilio

Twilio is by far the most well-known SMS provider and offers a suite of other related services and features that enhance your SMS abilities. In addition to SMS, Twilio has other various APIs for voice, email, and video.


➞ Alpha Sender

➞ Short Code Reroute

➞ Country Code Geomatch

➞ Track Messages

➞ Sticky Sender

➞ And More…

Plivo SMS API Provider for Marketers

2. Plivo

Plivo provides a powerful API that includes connectivity in over 190 countries for the SMS and voice calling APIs.


➞ Two-Factor Authentication

➞ Alerts and Notifications

➞ SMS Survey

➞ SMS Autoresponder

➞ SMS Marketing

➞ And More…

MessageBird SMS Provider for texting and marketing

3. Message Bird

Message Bird prides themselves on the flexibility they provide through their APIs, such as SMS, Voice, WhatsApp, WeChat, Messenger, Instagram, Email, and more. The Message Bird platform is powered by over 240 direct-to-carrier connections.


➞ Verification

➞ Flow Builder

➞ Campaign Builder

➞ Email to SMS

➞ And More…

Sinch SMS Marketing Service

4. Sinch

Sinch is a pioneer in SMS messaging, providing SMS services since 2008. They offer a dynamic range of SMS features, including RCS and MMS to offer an enriched experience.


➞ 10DLC

➞ Short Codes

➞ Number Lookup

➞ Rich SMS

➞ RCS Messaging

➞ And More…

Vonage SMS API Service

5. Vonage

Vonage is a secure SMS Gateway that provides communication APIs for developers focused on building contact center solutions.


➞ Private SMS

➞ Customer Notifications

➞ Verify

➞ Reports

➞ Phone Validation

➞ And More…

No code. No Developers. 

Sign up, upload a list, and start sending text messages within just minutes. Get a 14-day free trial with 100 free texts.

BandWidth SMS Solution

6. Bandwidth

Bandwidth is a CPaaS provider and a network operator, which gives you more control and insight over your text messages.



➞ Alerts and Notifications

➞ Two-Factor Authentication

➞ SMS Marketing

➞ SMS Surveys

➞ And More…

Telesign SMS API

7. Telesign

Telesign lets you send and receive text messages with their SMS API – over 700 direct-to-carrier routes.


➞ SMS Messaging

➞ RCS Messages

➞ WhatsApp API

➞ Notifications

➞ Private Messages

➞ And More…

Clickatell SMS Provider

8. Clickatell

Clickatell makes engaging in two-way conversations simple. Clickatell has SMS features for your essential texting needs and focuses its product around 1 on 1 conversations.


Two Way Chat




➞ Learn More…

MSG91 SMS API solution

9. MSG91

MSG91 provides a one-stop-shop API for SMS, Email, and Voice – catering to over 800 networks and 190+ countries.


Automated Messages

Dedicated Routes

Multi-Language Support

➞ Learn More…

BSG Gateway for SMS

10. BSG

BSG is a multi-channel API platform that enables you to make use of a diverse range of SMS features and integrate them into your existing solution.


➞ Bulk Messaging

➞ Short Links

➞ One-Type Passwords

➞ SMS Testing

➞ And More…

How do I start using SMS?

You don’t need an SMS API to start texting your customers. Moreso, integrating an API will require help from developers, which, if you don’t have it already, can get pretty expensive depending on what you intend to do.

With CCAI, you don’t need to be a developer to start sending SMS messages to your audience. Sign up for a free account and begin reaching your customers on their mobile phones.

Step 1: Create an Account

1. First, navigate to Cloud Contact and sign up for an account. Here you will have the option to sign in using your email, or sign in using Google, Facebook, or Amazon.

Signing up for an SMS Gateway

2. After you have signed in with your preferred method, you will be asked to read and agree to the Terms and Conditions. Select the box that says, “I confirm that I read and agree to terms and conditions” and click Register.

SMS API Sign up

3. You will be sent an email verification email to verify your account. In the email, click the Confirm Now button.

Email Confirmation

4. After you clicked the button, you will be taken to a page where you will set your password. Set your password and click Create Password

Create password for sms api

5. Next, you will be sent to a page where you will be able to submit your company name, identify which country you wish to send from, and select a phone number. Once you have filled out these details, click Save.

Create SMS Gateway Phone number

5. Next, you will be sent to a page where you will be able to submit your company name, identify which country you wish to send from, and select a phone number. Once you have filled out these details, click Save. Now that your account is set up, you can upload contacts.

Step 2: Upload Contacts

There are two options when uploading contacts on Cloud Contact: Upload a CSV or manually upload contacts.

1. Select Contacts from the left-hand menu then click Create Contact.

Create contacts for texting API

Choose whether you would like to manually upload your contacts or upload a list.

For manual upload:
a. Click Add
b. Enter information
c. Click Save

For CSV upload:
a. Download and check our CSV Template for proper contact upload
b. Click Choose a file and select your list – ensure your list is uploaded in CSV format
c. Click Create

Upload texting api contacts

Now that you have uploaded your contacts, it’s time to get down to business and start sending texts to the contacts that you just uploaded.

Step 3: Send an SMS Campaign

1. Select SMS Campaign in the left-hand menu and click Create Campaign.

Send an SMS with an API

2. Here, you will be able to choose your campaign name, what time you would like the campaign to be sent, and choose between several dynamic tag options. After you have crafted your message to perfection, click Next.

Create a text message campaign

3. Next, you will choose your contacts. You can either upload a list, manually add contacts, or select contacts from your already-uploaded list of contacts. In this example, we will manually upload contacts. After you have uploaded your contacts, you will click Create.

Uploading contacts

4. Before your campaign gets sent out into the world, you will be asked to confirm your campaign. Once you’re sure that your campaign is ready to be seen, click Send Campaign.

Confirm SMS API Campaign

You’ve now sent your first campaign – congratulations!