How quickly can I send SMS messages?
Each of your Twilio SMS-enabled phone numbers can send SMS messages at a rate of at most one message per second. You can make requests to Twilio as fast as you like, and Twilio will queue the messages, releasing them at a rate of one message per second. This rate does not vary based on the country in which your number is located.
It is not possible to adjust this rate, but if you will be sending more messages, you can purchase several numbers. Depending on what your use case is, a short code may be a better option for you. Check out our short code FAQ or talk to our sales team to determine what is best for you.