Wednesday, 17 Jul 2024

The Top 7 OTP Service Providers to Secure Your Customers

otp service provider

The wrong OTP service providers will set your business back decades. Imagine a daily loss of hundreds of thousands of dollars because customers can’t receive OTP verification codes when they need to pay for your service. Now stop imagining and pay attention because this article will help you avoid that nightmare. You are about to see 7 of the best OTP service providers that you can choose from. We assessed each vendor based on their pricing, speed, security, and global availability. So that you can make an informed choice, delight your customers and multiply your revenue. But first, a short chatter about OTP wouldn’t hurt.

What is OTP?

OTP is a 4-6 numeric or alphanumeric code with a single-use specific function for a particular session/authentication. In today’s age, it is pretty normal to have a double-factor authentication or even a multi-factor authentication. It ensures an added layer of security and prevents fraud and security theft. OTP was developed to serve the singular purpose of providing authentication and verifying users. It is used in quite a few businesses to maintain a secure and safe user flow. OTP is usually sent via an SMS, and they tend to expire after a certain amount of time – generally after 10 minutes. So as a business, you need to ensure that your customers instantly receive their OTPs and can log in/authenticate smoothly. For this, you need to choose an OTP service provider’s voice or SMS OTP verification service.

What is an OTP service provider?

An OTP service provider is any company or platform that helps you deliver OTPs to customers. The service provider may use SMS, email, or mobile apps. OTP service providers help businesses improve security by adding an extra layer of authentication to protect user accounts and sensitive information.

What features should I look for in an SMS OTP provider?

Here are the nine features you should look out for in an SMS OTP provider:

  • Delivery speed and reliability: Reliability measures the percentage of outgoing SMS OTP that reach their intended destination. On the other hand, delivery speed measures the time between sending and receiving the SMS OTP. Both metrics offer valuable information on the deliverability of SMS OTP.
  • High delivery rates: High delivery rates ensure your customers receive SMS OTP as soon as possible. Technically a 100% delivery rate is unachievable. Look for a rate as close to 100% as possible.
  • High-level security features: Security features like single-time or time-limited use give SMS OTPs an edge over email authentication. SMS OTPs also give you an additional layer of security when used with passwords.
  • Compliance with relevant regulations: Choosing SMS providers that mind compliance helps you abide by the laws of the land. Refer to your local regulatory body to learn about the general laws and regulations. Then ask your SMS provider how they apply them.
  • Two-factor authentication: 2FA helps you secure your accounts by adding an additional layer of verification. Single-step verification can be hacked into, so having 2FA via SMS OTP is essential.
  • Integration with third-party applications: OTPs are autogenerated. An OTP service provider that easily integrates with other applications makes life easy for you.
  • Customer support: You will not be able to figure it all out by yourself. You will need to connect with your SMS provider when you hit a roadblock. A 24/7 support structure in addition to a knowledge base that you can refer to is ideal.
  • Transparent pricing: While most pricing is displayed on websites, some cost structures may be hidden, like recurring monthly costs. These can significantly impact your operational costs.
  • Flexible billing options: Compared to a fixed billing option, a flexible option lets you pay for the consumption. Look for pay-as-you-go options with SMS providers. This will drastically reduce your operational costs.
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Which are the top 7 OTP service providers?

Here is the list of the top OTP service providers:

  • SMSCountry
  • Telesign
  • 2Factor
  • Msg91
  • Exotel
  • Vianett

Let’s look at each of them.

SMSCountry – best for businesses of all sizes

An e-commerce customer satisfied with SMSCountry

SMSCountry has been the leader and one of the best OTP SMS service providers globally since 2003. They have been delivering SMS in more than 200 countries and have 550+ mobile network operators. SMSCountry provides the best SMS gateway for OTP. With this OTP verification service provider, you can deliver OTPs in less than 10 seconds in more than 60+ countries. Also, SMSCountry enables you to send your OTPs with unique sender IDs and verified tags allowing for better recognition and facilitating brand trust in your customers. SMSCountry offers detailed reporting and analytics through its dashboard for every SMS you send. Additionally, you can run automated SMS marketing campaigns, send voice SMS, conduct polling and voting, send reminders, schedule messages, and personalize messages.

Telesign – best for high-risk applications

Telesign is a well-known OTP company that focuses on 2-factor authentication services. Their prime area of focus is social media websites that allow users to have added security to their accounts. They offer patented phone-based verification and two-factor OTP authentication services.

2Factor – best for small organizations

2Factor is a cloud messaging platform that is proficient in A2P messaging, whereas all their services and tech are developed in-house. Their OTP service is quite reliable and offers text-based and voice-based services. They also have an extensive reporting and analysis tool that allows users to adjust their campaigns.

Msg91 – best for an experienced marketing team

Msg91 was founded in 2008 and is the sister company of Walkover Technologies. They work in the sphere of cloud communication platform services. Their product SendOTP is their premium 2-factor authentication product. It offers OTP features, and with its service spanning over 800 networks and in 190 countries, they are an excellent choice for medium to large businesses.

Exotel – best for large enterprises

Exotel offers cloud telephony services at an enterprise level. Their product, nOTP, includes their OTP service. This includes 2-factor authentication, passwordless logins, resetting of passwords, and spam prevention. They also allow users to authenticate and verify their transactions and logins without the need for third parties.


Vianett is one of the most popular SMS gateways that facilitate your business to send high-quality SMS gateway services. Using their service, you can send your OTPs globally. Vianett also offers additional services such as bulk SMS, SMS billing, HLR-lookup, and 2-way communication. – best for local startups

Based in Delhi, offers various services, including OTP. Their bulk SMS services cater to OTP, promotional, and transactional requests.

How to choose an OTP provider?

Many voice and SMS OTP service providers in the market are ready to offer their services. But how do you find the right provider?

Here are a few things you can take into consideration before choosing a provider:

  • OTP delivery speed should be quite fast ( < 10 seconds)
  • Uptime should be close to or more than 97%
  • A 24/7 customer service
  • Number validation as a service should work efficiently
  • Global presence of the provider

Also, do you want a domestic or international OTP service provider? Ensure that you consider these when trying to choose your OTP service provider for your business and OTP needs. Follow these steps:

  1. Determine your OTP requirements: Consider factors such as the number of OTP messages you need to send per month, the geographical coverage required, and if you have any specific needs, such as message personalization or scheduling.
  2. Research potential providers: Look for providers that provide the nine features explained in the previous section. Sift through reviews, comb through company websites, and gather information about services, features, and customer feedback.
  3. Check delivery rates: You want to choose a provider who consistently delivers your OTP without delays or failures. Look for providers with high delivery rates. Also, check their claims and see what measures they take to ensure message delivery.
  4. Evaluate security: Ensure your SMS service providers have robust security measures to protect your data and prevent unauthorized access. Look for features such as encryption, secure API connections, and compliance with data protection regulations.
  5. Check customer support: Having reliable customer support can be crucial, especially when you encounter issues with SMS campaigns. Check your provider’s customer support through various channels like phone, email, or live chat. Look for providers that provide support during your business hours and have a reputation for helpful and prompt customer service.
  6. Evaluate pricing: Consider your budget and then evaluate the pricing models of all your shortlisted bulk SMS service providers. Look for hidden pricing. Also pay attention to factors such as message volume discounts, contract terms, and any limitations or restrictions that may affect your usage and cost.
  7. Check API integration capabilities: To autogenerate and automatically send OTPs, you use an API. Choose an OTP service provider with a dev-friendly API with comprehensive documentation.
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Frequently Asked Questions

What are the benefits of using an SMS OTP service provider?

An SMS OTP service provider offers benefits like easy implementation, widespread availability, and familiarity.

How secure is using SMS OTP for authentication purposes?

SMS OTP is relatively secure for authentication purposes, but it is prone to vulnerabilities like SIM swapping and interception.

How reliable is SMS delivery for OTP purposes?

SMS delivery for OTP purposes is generally reliable. But expect occasional delays or failures due to network congestion.

How does an SMS OTP service provider handle delivery failures and retries?

An SMS OTP service provider automates this process. They should have a mechanism to send messages through alternate delivery routes or backup operators.

What level of customer support should I expect from an SMS OTP service provider?

The level of customer support can vary. At the minimum, expect timely, if not immediate, assistance and guidance for any issues you encounter.

Can I customize my SMS OTP messages with an SMS OTP service provider?

Yes, you can customize your SMS OTP messages with an SMS OTP service provider.

How easy is it to integrate an SMS OTP service provider with my existing systems and applications?

You can inquire or look for APIs or SDKs provided by the service provider to integrate an SMS OTP service provider with your existing systems and applications.

What are the costs associated with using an SMS OTP service provider?

The costs associated with using an SMS OTP service provider vary depending on factors like message volume, features required, and additional services you require.

How do I know if an SMS OTP service provider is compliant with relevant regulations and standards?

Verify if your selected SMS OTP service provider follows industry best practices and adheres to the regulatory norms and practices of your country. They should not just claim to follow them but also practice them. You can know this from online reviews and from your conversation with their team.

Which OTP provider is the best in Nigeria?

SMSCountry offers OTP services in Nigeria. It is one of the best OTP providers for banks and businesses. SMSCountry also offers SMS and Voice SMS services.

What is the price of OTP service providers?

Price varies with the SMS provider and your network provider. For the price of sending OTP using SMSCountry, see our pricing page.

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What is an OTP SMS service?

An OTP SMS service enables the delivery of OTPs via SMS. A unique, temporary password is sent to the customer’s mobile for authentication during login or registration.

Which company provides OTP?

SMSCountry is the leading provider of OTP, SMS, Voice SMS, and APIs. You can choose from the most suitable channel for your requirement. A REST API is used in the backend to send the code to the customer.

Who are the OTP providers?

SMSCountry is the leading provider of OTP. You can choose from the most suitable channel for your requirement. SMSCountry offers a 99.9% delivery rate and low latency. A REST API is used in the backend to send the code to the customer.

Which is the best OTP provider in Nigeria?

SMSCountry is the best OTP service provider covering all major areas. We help businesses of all sizes. Banks and other businesses can carry out authentication with OTP smoothly.

Which company generates OTP in India?

SMSCountry provides an OTP service in India, which helps users generate OTPs in 180+ countries. We are one of the fastest bulk OTP SMS providers ensuring your OTP is delivered within 10 seconds. We have an uptime of 99.9%.

How do I get OTP service?

Here is what you need to do:

  1. Research OTP service providers in your country/city. Look for reliability, security, scalability, and high uptime.
  2. Shortlist from your research and then select one that fits your needs.
  3. Sign up to create a free trial account if they offer one. If they do not offer any, talk to their support team and see how you can get an account to test the platform.
  4. Set up your account. Add API keys to your system and create OTP messages on the service provider’s interface.
  5. Now test the service by sending a test SMS.
  6. Once you are satisfied with the results of the OTP, purchase a paid account from the provider and deploy it to your entire system.

What is the OTP verification code service?

An OTP verification code service validates the identity of users during online transactions or account logins. The service generates and delivers a unique numeric or alphanumeric code to the user’s registered mobile number or email address. The user enters this number or code back into the system to verify themselves.

Who are the OTP providers?

SMSCountry is one of the best OTP service providers.

How does OTP service work?

OTP service generates a unique code and sends it to a registered user’s mobile number or email address upon request. The user must enter this code to authenticate their identity during online transactions or logging into their account. OTPs are random codes valid for a single use or a limited period.

Which company provides OTP service in India?

SMSCountry is the best OTP service provider in India. We provide the fastest bulk OTP service through a secured gateway, ensuring your transactions are 100% secure. We are the pioneers of bulk SMS marketing platforms.

How to choose an OTP provider?

When choosing an OTP provider, consider factors such as delivery speed, uptime, customer service, number validation, and global presence. Shortlist potential providers, research them thoroughly, and evaluate their security, customer support, pricing, API integration capabilities, and compliance with relevant regulations.


Choosing the right OTP service provider is crucial for the security and success of your business. Consider the features, reliability, and support offered by each provider before making a decision. By selecting a top-notch OTP service provider, you can ensure that your customers receive their verification codes promptly and securely. Don’t compromise on the safety of your customers’ data – choose an OTP service provider that you can trust.

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