Glossary
An AI SMS agent is software that automatically replies to text messages sent to a business's phone number, using an AI model to understand the message and generate an appropriate response — without a person typing the reply.
An AI SMS agent connects to a business texting number (commonly through a provider like Twilio). When a customer sends a text, the agent reads it, generates a relevant reply based on the business's information, and sends it back — typically within seconds.
These are often confused but solve different problems. An AI SMS agent replies to texts a business already receives. A missed-call text-back service only sends a text after an unanswered phone call — it doesn't handle texts that were sent to the business directly.
Businesses that already receive direct texts from customers — appointment questions, pricing questions, follow-ups — use an AI SMS agent to make sure those texts get a fast reply even outside business hours. CloseReply's SMS Agent replies to inbound texts within 60 seconds on the Growth plan and above.
Not entirely — most businesses use it to handle the first reply and routine questions, with a human able to step in for anything that needs a personal touch.
The SMS Agent is included starting on the Growth plan; the Email Agent is included on every plan, starting with Starter.
CloseReply connects to your Gmail and Twilio number and replies to inbound email and SMS leads in under 60 seconds, 24/7.
Start Your Free Trial → Or see plans and pricing →Last updated: July 2026.