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.

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Collect phone numbers and emails

Collect additional details like name, email, zip code from subscribers using automated follow-ups.

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Personalize follow-up texts

Use the information collected to personalize follow-up messages.

Nudge people to complete the sign up

Encourage people who drop off to complete the sign up flow

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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.

Maintain a clean list

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

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Learn how organizations are using CallHub today

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

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

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.

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Set up your auto-reply

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

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Create follow-up prompts for data collection

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

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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.

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Engage with your mobile list with texting and calling campaigns

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Texting tools

✓ Send a broadcast message to all contacts with Mass Texting.
✓ Have 1-to-1 conversations with Peer-to-Peer Texting.

Calling tools

✓ Send a recorded voice message out to all your contacts with Voice Broadcast.
✓ Run outbound calling campaigns to contacts through the Call Center.

Grow your mobile list with opt-in text messaging

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

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

What is the difference between renting a keyword and renting a dedicated short code?

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.

How do I get a dedicated short code?

Create a free CallHub account and submit a request for a dedicated short code. The process usually takes 6-8 weeks.

Can I use my existing short code with CallHub?

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.