How Do I Send 10,000 SMS at a time?

Published 29 April 2025

Table of contents

In a business, normally, more than 1000 SMS are sent per day for marketing, alerts, updates, and other various purposes. If SMS are sent manually, it requires careful scheduling for each message, which increases the likelihood of human errors and delays.

Automated tools and services are the most efficient way to send 10000 SMS at a time. You can set the date and time to deliver the messages at the optimal local time for recipients in different time zones.

Highlights:

Sending a large number of text messages to multiple recipients simultaneously is referred to as Bulk SMS or Mass Texting.
One of the most effective ways to send bulk sms is using VoIP (Voice over Internet Protocol) service providers.
To send 10,000 SMS messages simultaneously, you can utilize specialized bulk SMS providers, SMS marketing platforms that offer web portals or APIs, or Email to SMS gateway.

What are the Effective Methods for Sending Bulk SMS?

VoIP, API, email-to-SMS, and bulk SMS software are effective methods for sending bulk SMS messages simultaneously, ensuring the delivery of timely and relevant messages.

1. VoIP Service Provider

A VoIP service provider offers APIs and plugins that integrate with CRMs, websites, and messaging platforms efficiently. It automates the messages to deliver quickly via robust SMS gateways to deliver on time.

How to do it:

Choose a provider with bulk sms functionalities.
Upload your list of 10,000 phone numbers into the platform.
Compose your SMS content under character limits.
Choose to send the messages immediately or schedule them for a specific time.
Use the provider's analytics tools to track delivery status and engagement metrics.

Advantages:	Limitations:
Send messages internationally without incurring additional charges. Manage messages from any internet-enabled device. Support two-way messaging, allowing recipients to reply to your messages instantly.	Relies on third-party SMS gateways, which carriers may not fully support. Only a limited number of SMS can be sent, depending on the provider's capacity.

2. Bulk SMS Service Provider

Bulk SMS service provider uses carrier-approved routes, including short codes and verified numbers, for faster and reliable delivery.

The short codes and verified IDs follow TCPA laws by tracking users' opt-ins and managing users' STOP/HELP responses. Also, mobile carriers only allow mass messaging through approved channels, which builds user trust in bulk SMS service providers.

How to do it:

Select a provider that meets your needs regarding features, pricing, and reliability.
Sign up for an account with your chosen provider.
Upload your list of 10,000 phone numbers in a CSV or Excel file. Ensure your list is clean and contains valid phone numbers with the correct country codes.
Write the SMS message you want to send.
Send the messages immediately or schedule them later.

Advantages:	Limitations:
Easy to use, no technical knowledge required. Provides status tracking (e.g., delivery reports).	May have upload limitations depending on the provider. Pricing can differ depending on the provider.

3. API for Programmatic Sending

With API Programmatic Sending, it allows to send 10,000 SMS through languages like Python or Node.js, making bulk messaging seamless. You can dynamically insert user-specific content (like name, OTP, and offer code) within each message using variables in the payload.

Many bulk SMS providers offer Application Programming Interfaces (APIs) that allow developers to integrate SMS sending capabilities directly into their own applications, websites, or systems.

How to do it:

Sign up with a provider like Twilio, Plivo, Nexmo/Vonage, or MessageBird, and get API credentials (key/token).
Obtain a phone number from the provider.
Use the provider’s SDK or make direct HTTP requests from your code.
Send a request to the API with the recipient number, your sender number, and the message content.
Handle the API response to check for success or errors.

Advantages:	Limitations:
Flexible, automated, and customizable. Can integrate with your existing CRM or systems.	Requires technical knowledge for integration. Rate limiting and API restrictions may apply.

4. Dedicated Bulk SMS Software

Software applications such as SMSCaster and Atomic SMS Sender connect directly to an SMS gateway, specifically designed for sending mass text. These tools allow you to send thousands of messages via your computer or server simultaneously.

How to do it:

Install and sign up for the bulk SMS software.
Import your list of phone numbers.
Customize the SMS content.
Start the sending process.

Advantages:	Limitations:
Ideal for personal use or small businesses. Can work offline with an internet connection.	Limited scalability. Requires hardware or server setup.

Conclusion

There are various methods to send 10,000 SMS simultaneously, from simple web interfaces and API integrations to more specialized SMS marketing tools. Many of these methods can be inefficient, inflexible, or not cost-effective. A more effective and convenient option for sending bulk SMS messages is to utilize a VoIP-powered business phone system.

Calilio offers bulk SMS service to help businesses send bulk messages simultaneously. It offers message scheduling, automated text responses, and SMS filters for enhanced customer engagement. Sign up for Calilio today!!