---
title: "Authenticate Customers with Phone Number and Integrate Twilio SMS"
description: "Learn how to authenticate customers using their phone number, and send OTP using Twilio SMS"
url: https://medusajs.com/blog/phone-auth-twilio
last_updated: 2026-08-13T15:01:28Z
---

# Authenticate Customers with Phone Number and Integrate Twilio SMS

_Published 2025-05-27 by Shahed  Nasser in Product_

Businesses highly benefit from customers creating an account. It builds customer loyalty as the business can stay in touch with the customer, offering them discounts, reminding them of their [abandoned cart](https://medusajs.com/blog/abandoned-cart-guide/), or offer them [loyalty points](https://medusajs.com/blog/loyalty-points/).

One way to increase the likelihood of customers registering on an ecommerce website is to provide multiple authentication methods. Aside from the traditional email-password authentication, businesses can provide [social login support](https://docs.medusajs.com/resources/commerce-modules/auth/auth-providers/google) or allow customers to login with their phone number.

Phone number authentication simplifies authentication for customers, as they don't need to remember their password. Instead, they receive a one-time password (OTP) on their phone to log in.

Medusa is a digital commerce platform that provides a Framework built for customizations. Medusa's Auth Module provides the flexibility to integrate third-party authentication services or implement custom authentication logic, such as phone number authentication. You can then use that authentication provider with any type of user, such as a customer or admin user.

> **Implement Phone Authentication + Integrate Twilio SMS**
>
> Follow this step-by-step guide.
>
> [Get Started](https://docs.medusajs.com/resources/how-to-tutorials/tutorials/phone-auth)

In [this tutorial](https://docs.medusajs.com/resources/how-to-tutorials/tutorials/phone-auth), you'll customize the Medusa application to support authenticating customers using their phone number. You'll also integrate [Twilio](https://www.twilio.com/en-us) to send an SMS to customers with their OTP, and you'll customize the Next.js Starter Storefront to support phone number authentication.