SMS Autoresponders & Text Message Auto Replies

SMS autoresponders, also called text message auto-replies or automated SMS responses, let businesses automatically reply to incoming messages based on keywords or triggers. These auto-replies deliver instant information — like updates, confirmations, or offers — without requiring someone to reply manually.

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An ecommerce shopper receives an SMS auto-reply with a discount code sent through SlickText

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At a Glance

Use SMS autoresponders to confirm signups, answer common questions, share business hours, deliver offers, or provide event details instantly. Responses can include links, personalization, and media, while built-in analytics help you measure engagement. For more advanced follow-up, an autoresponder can also start a multi-message workflow.

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What Is an SMS Autoresponder?

An SMS autoresponder is a prewritten text message that is sent automatically when a specific trigger occurs. For example, someone might text a keyword, join your subscriber list, complete a form, or message your business after hours.

A basic autoresponder sends one immediate reply. For more advanced follow-up, SlickText workflows let you add delays, send multiple messages, branch contacts into different paths, and respond to their actions over time.

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How SMS Autoresponders Work: Auto-Reply Triggers and Keywords

SMS autoresponders are the most common way that people are sending automated text messages. SMS autoresponders automatically send replies when triggered, whether to provide instant information or confirm a subscription.

That trigger might be a keyword someone texts in, like JOIN, HOURS, or INFO, but it can also be based on an action or condition inside your SMS marketing platform.

For example, you might send an automatic welcome message when someone joins a list, a confirmation after they fill out a form, a follow-up after they click a link, or an after-hours reply when someone texts your business outside normal operating hours.

In other words, SMS autoresponders are not limited to keyword replies. They can help your business respond instantly at key moments across the customer journey.

Setting Up an SMS Autoresponder

Setting up text message autoresponders can be broken down into two basic parts: setting up your keyword or trigger and then configuring your auto response SMS message. Our platform makes this process so easy that most people are up and running in a matter of minutes.

The Keyword

A keyword is a word or phrase that people can text to an SMS short code or phone number to trigger an autoresponder text message. A keyword can be more than one word but is recommended to be kept short, easy to spell, and easy to remember. You can set up as many or few keywords as you like, each with a dedicated auto-reply. You can use keywords to opt subscribers into a list, automatically reply with information, or both. Additionally, some modern autoresponders allow you to set up after-hours replies within the platform.

The Auto Response Message

This is a text message that will be immediately sent back to people after they text a keyword to your number. An auto response text can be used to set expectations and provide important information to customers. The standard limit on text messages is 160 characters, however, our service allows your responses to be up to 1,600 characters if needed. You can even include a picture with your message to achieve greater engagement.

Using auto responses improves customer satisfaction and improves productivity by automating repetitive tasks. Auto responses can include a link to resources, help customers receive important updates, and provide next steps for further action.

By default, each keyword has just one automated text message response associated with it. In some cases, one response may not be sufficient. What if you need to provide a series of text messages or engage in two-way messaging to collect more information? Our drag-and-drop workflow tool enables you to build automated message sequences based on contact behavior or time.

SlickText UI showing the fields for creating an SMS keyword and auto response
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Engagement Analytics & SMS Auto-Reply Reporting

Our reporting and analytics dashboard provides a wide array of data about the effectiveness of your texting program.

Including a link in automated text responses will help you understand who is engaging with each text message. Not only can you track the number of clicks, you can also track which individuals have clicked so that you can send future messages based on whether they did or did not take action.

Graphs from SlickText analytics showing revenue activity and campaign clicks for a brand using SMS marketing
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Who Uses SMS Autoresponders?

Many types of businesses use text messaging, and autoresponders have several use cases. This is what makes them so attractive for delivering instant information.

The most common use case for auto-replies is to confirm subscriptions to text messaging lists. These messages thank people for joining, offer important information, and provide instructions on how to opt out of that list if they so choose. You can also attach your contact card to this message and encourage subscribers to save your business as a contact.

Aside from list confirmations, you can deliver valuable information to people that request it. Some of those popular use cases include:

  • Public transit updates
  • Event schedules
  • Business hours
  • App downloads
  • Real estate home information
  • After-hours reply
A millennial man and woman receive an SMS auto-reply from a store using SlickText for SMS marketing
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What Can Trigger an SMS Auto-Reply?

SlickText can automatically send a response when someone:

  • Texts a keyword such as JOIN, HOURS, MENU, or INFO
  • Joins a subscriber list
  • Submits a web form
  • Scans a QR code and submits an opt-in
  • Messages your business outside normal hours
  • Clicks a tracked link
  • Reaches a specific step in an automated workflow
  • Completes another action through a connected integration

Each trigger can deliver an immediate response, provide next steps, or begin a longer automated sequence.

A customer receives an SMS auto-reply triggered by signing up for a texting list

SMS Autoresponder Examples

Here are a few ways businesses use text message auto-replies:

Use Case Keyword Example Auto-Reply
New subscriber welcome JOIN Thanks for joining! Enter code VIP15 for 15% off your first order: [link]
Business hours HOURS We’re open Mon–Fri 9am–6pm and Sat 10am–3pm. View holiday hours here: [link]
Event information EVENT Thanks for your interest! Doors open at 6pm. View parking, schedule, and ticket details here: [link]
Real estate listing 123 MAIN Thanks for asking about 123 Main St. View photos, price, and open house details here: [link]
App download APP Download our app here: [link]. Reply HELP if you need assistance.
After-hours reply Triggered by any message received after business hours Thanks for reaching out! Our team is offline right now, but we’ll reply during business hours. In the meantime, our FAQs may have the answer you need: [link]

WHY CHOOSE US

Why You Should Choose SlickText for Your SMS Autoresponders

We’re the most popular SMS marketing service on G2. Here are three reasons why...

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Easy Set Up

Setting up text autoresponders should be very simple. With SlickText, it only takes a few minutes to create a keyword and auto-response message. Plus, built-in SMS compliance features make it easier to follow opt-in and opt-out requirements.

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Flexible Options

Whether you need to send short and simple auto responses or a series of engagements over time, we have the features to help you accomplish your business goals.

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Free Incoming Messages

There is an inherent cost that all SMS marketing companies incur to both send and receive text messages. Most charge you for both. We don’t. We only charge for outbound messaging, which keeps more money in your pocket.

FAQs About SMS Auto Replies

What is the best SMS autoresponder?

The best SMS autoresponder is one that allows you to automatically reply to incoming texts using keywords, triggers, and scheduling. Look for features like customizable responses, workflow automation, personalization, analytics, and easy setup. The ideal solution should also support multiple triggers, integrations, and compliance tools to manage opt-ins and opt-outs.

How much do SMS autoresponders cost?

SMS autoresponder costs vary depending on the provider, number of messages sent, and included features. Most platforms offer autoresponders as part of their SMS marketing plans, with pricing typically based on monthly message volume. Some providers include autoresponders at no extra cost, while others charge for advanced automation capabilities.

What is an SMS autoresponder?

An SMS autoresponder is an automated text message that's instantly sent to someone after they text a specific keyword to your business phone number or short code. Also called text message auto-replies, they deliver immediate responses without manual intervention. For example, when a customer texts "HOURS" to your number, they automatically receive your store hours. Autoresponders are commonly used for subscription confirmations, delivering on-demand information, discount codes, event details, and instant customer support responses.

How do I set up an automatic text reply?

Setting up an automatic text reply involves two simple steps. First, create a keyword—a word or phrase people text to trigger the response (like "JOIN" or "INFO"). Keep keywords short, easy to spell, and memorable. Second, write your auto-response message, which can be up to 1,600 characters and even include images. Most SMS platforms like SlickText let you set this up in minutes through an intuitive dashboard. You can create unlimited keywords, each with its own automated response, and even build multi-message sequences using workflow automation tools.

Can SMS autoresponders send multiple messages?

Yes. Many SMS autoresponders can send multiple messages as part of a sequence or workflow. For example, you can send an immediate confirmation message followed by additional texts minutes, hours, or days later. This allows businesses to create automated follow-ups, onboarding sequences, or drip-style campaigns.

Can I include images or links in automated text replies?

Yes, you can include both images and links in SMS autoresponders through MMS (Multimedia Messaging Service). While standard SMS supports text only with 160 characters, MMS allows up to 1,600 characters plus images, GIFs, videos, and other media. Including clickable links is highly recommended because it lets you track engagement. You can see exactly who clicked and send targeted follow-up messages based on that behavior. Most modern SMS platforms support rich media autoresponders without additional setup.

What keywords trigger SMS autoresponders?

Any word or phrase you configure can trigger an autoresponder. Common keywords include: STOP, CANCEL, UNSUBSCRIBE (required opt-out keywords), JOIN, START, SUBSCRIBE (opt-in keywords), INFO, HOURS, MENU, LOCATION (information requests), COUPON, DEAL, SALE (promotional triggers), and HELP (support requests). You should choose keywords that are short (ideally one word), easy to spell, memorable, and relevant to your offer. You can create as many custom keywords as needed, each with its own automated response message.

What's the difference between SMS autoresponders and chatbots?

SMS autoresponders send pre-written automated text replies triggered by specific keywords, while chatbots use conversational AI to understand and respond to various inputs dynamically. Autoresponders are simpler, more reliable, and perfect for delivering consistent information like discount codes, hours, or subscription confirmations. Chatbots offer more flexibility for complex conversations but require more setup and can sometimes misunderstand requests. For most businesses, autoresponders provide the right balance of automation and reliability for common customer interactions.