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SMS Opt-in to grow your mobile list

Collect phone numbers, email and more details from people who attend your events to grow your mobile list.

Questions?
Questions? Talk to an expert
Text to join sms marketing sample flow

Collect phone numbers and emails

Collect additional details like name, email, zipcode from subscribers using automated follow-up’s.

  • Collect permission to message a person
  • Display useful instructions during opt-in
  • Offer clear opt-out instructions
  • Acknowledge opt-out requests
Collect phone and email text to join v4
Personalized follow up text to join v3

Personalize follow-up texts

Use the information collected to personalize follow-up messages.

  • You can send a single, personalized text message to all your contact segments at once.
  • Text messages reach all your contacts immediately, which is great for time-sensitive messages.
Personalized follow up text to join v3

Nudge people to complete the sign up

Encourage people who drop off to complete the sign up flow.

  • Collect permission to message a person
  • Display useful instructions during opt-in
  • Offer clear opt-out instructions
  • Acknowledge opt-out requests
Retry sms text to join v5
Add subscribers to CRM text to join

Add new subscribers to Blackbaud and NationBuilder

Create profiles back in Blackbaud, NationBuilder and Action Network for new subscribers. If you can’t find your database in our list of Integrations, use our Zapier integration to connect existing tools to CallHub.

  • You can send a single, personalized text message to all your contact segments at once.
  • Text messages reach all your contacts immediately, which is great for time-sensitive messages.
Add subscribers to CRM text to join

Maintain a clean list

We keep your lists clean by automatically unsubscribing people who reply with STOP, END, CANCEL, UNSUBSCRIBE, and QUIT.

  • Collect permission to message a person
  • Display useful instructions during opt-in
  • Offer clear opt-out instructions
  • Acknowledge opt-out requests
Automated mass texting opt out

Learn how organizations are using CallHub today

How 350 used text messages to organize the Climate Strike

MN350 built an engaged list of 2919 young climate activists, and organized them to take further action towards climate justice.

Priya whelan 350 organizer
Using texting to identify supporters with 20% response rate.
Geek in Disguise: Winning local elections through data sharing

Ready to build your mobile list with SMS Opt-in?

Try it free. No credit card required. Instant setup.

Questions?
Questions? Talk to an expert

How SMS Opt In (Text To Join) works

Set up a keyword

Choose a keyword of your choice after creating a free account.
When someone texts you the keyword, they’re opted in to your list and can be included in future group texts.
If you have a large texting program, you can place a request for a dedicated short code after sign up. A dedicated short code lets you create unlimited keywords at no additional cost.

  • Collect permission to message a person
  • Display useful instructions during opt-in
  • Offer clear opt-out instructions
  • Acknowledge opt-out requests
Keyword set up sms opt in v2

Set up your auto-reply

We keep your lists clean by automatically unsubscribing people who reply with STOP, END, CANCEL, UNSUBSCRIBE, and QUIT.

  • Collect permission to message a person
  • Display useful instructions during opt-in
  • Offer clear opt-out instructions
  • Acknowledge opt-out requests
Thank you sms opt in text to join

Create follow-up prompts for data collection

Choose a keyword of your choice after creating a free account.

  • Collect permission to message a person
  • Display useful instructions during opt-in
  • Offer clear opt-out instructions
  • Acknowledge opt-out requests
Prompt name email sms opt in text to join v2

Publish the keyword

Draft the confirmation message that’s sent to subscribers as soon as they join your list. If you’re only collecting mobile numbers, the opt-in process ends here.

  • Collect permission to message a person
  • Display useful instructions during opt-in
  • Offer clear opt-out instructions
  • Acknowledge opt-out requests
Publish keyword sms opt in text to join v4

3000+ of the world’s biggest organizations
trust CallHub for engagement

org 350bernieGeorgia Democratic Party logo-4b4b4bamnesty international logo-4b4b4bhuman rightssierra club

Grow your mobile list with opt-in text messaging

Grow your mobile list with opt-in text messaging

Try it free. No credit card required. Instant setup.
Questions?
Questions? Talk to an expert

Common questions about SMS Opt In (Opt-in Text Messaging)

When you rent a keyword, you’ll be using a short code (eg.33339) that is shared between organizations. Hence the affordable pricing.
When you rent a dedicated short code, you will have sole access to the short code, allowing you to create unlimited keywords at no additional cost. The monthly rental for a dedicated short code can range between $500 - $1000.
If you’re starting out with SMS marketing, renting specific keywords is more cost-efficient.
Create a free CallHub account and submit a request for a dedicated short code. The process usually takes 6-8 weeks.
Yes, please create an account and submit a request. If you’re using the same carrier provider as CallHub you can get started immediately. If not, the shifting process can take 6-8 weeks.