Two-way SMS messaging in Slack channels

Finally, a way to manage all your SMS messages in one place. No more personal phone numbers, no more chaos.

Customer Support

Answering a customer question is a Slack message away.

Bring your customer conversations to Slack, where you and your team can collaborate and respond quickly & efficiently, without switching to other applications.

Never miss a customer message again.
Get real-time SMS notifications in Slack and respond to customers directly from the Slack thread.
Get everyone involved in customer support.
Enable anyone in your team to respond to customer messages via dedicated Slack channels.
Provide a seamless customer experience.
Your customers can reach you on their preferred channel, and you can respond from Slack, where you're already working.
Answering a customer question is a Slack message away

SMS Notifications

Never miss a time-critical SMS message again.

Have your team stay connected to partners, vendors, and services, even when you're away from your phone. You can receive SMS messages from any sender.

Time-critical notifications.
Receive order updates, appointment reminders, and other time-critical messages.
Avoid bottlenecks.
Don't rely on a single phone number to receive messages, share messages with everyone in your team.
Receive SMS messages from any sender, including short-codes, toll-free numbers, and international numbers.
Answering a customer question is a Slack message away
Michael Seibel

Just a piece of advice. I used my personal cell number as the company number and I still regret it a decade later (I get so many stupid calls). Don’t do what I did.

Michael Seibel

Managing Director at Y Combinator

We make SMS easy and painless

But don’t just take our word for it.
We’ll let the product do the talking.

Talk with your customers in Slack.

Associate a phone number with a Slack channel where your team can reply directly to any messages.

Talk with your customers in Slack

Communicate with more than just text.

Express yourself with images, audio, and video.

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Keep everyone in the loop.

Send group messages to ensure that everyone is in the know.

Talk with your customers in Slack

Personalize your phone numbers.

Create custom phone numbers with local area-code prefixes so you can be closer to your customers.

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Phone numbers around the world.

Extend your reach by creating international phone numbers.

  • 🇺🇸 United States of America
  • 🇬🇧 United Kingdom
  • 🇦🇺 Australia
  • 🇧🇪 Belgium*
  • 🇧🇷 Brazil*
  • 🇨🇦 Canada
  • 🇫🇮 Finland *
  • 🇳🇱 Netherlands*
  • 🇵🇱 Poland*
  • 🇸🇪 Sweden*

* Requires additional verification.

Talk with your customers in Slack

Label your contacts.

Assign labels to phone numbers, so you can quickly identify who you're communicating with.

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Never miss another voicemail.

Are you customers chatty? Receive voicemails that are automatically transcribed in Slack.

Talk with your customers in Slack

Relay Slack messages.

Automatically forward messages from Slack to any phone number.

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“This was by far the simplest approach out there. The ability to generate numbers and associate them to a channel, right in Slack, was wonderfully painless. I had this setup in minutes.”

Jacob Giordano
Jacob Giordano

“We are loving the app, we use it to receive SMS notifications on shared accounts and has been a great time saver for us.”

Danielle Whetstone
Danielle Whetstone
C Squared Social

Get started in under 10 minutes

Join hundreds of happy customers

Add to Slack

Security First

We value your data and are committed to keeping it safe and secure, our knowledge of security and its importance to your work runs deep.

Development Process

We follow industry best practices, so security is baked right into our product and regular development processes.


Data in transit runs entirely over SSL. Data at rest is encrypted with AES 128/256. Billing information is entirely managed by our PCI-compliant payments provider.

Infrastructure Security

We are committed to highly available infrastructure. It runs on fault-tolerant systems and backups are made daily.

Manage SMS messaging in Slack

Supercharge your SMS communications

Pay-as-you-go pricing, unlimited features, and a
free trial make it easy to get started.

Pay-as-you-go pricing

Only pay for active phone numbers and any received or sent messages.

Compatible with most providers

Compatible with Amazon, Google, SendGrid and many others.


We follow industry best practices, so security is baked right into our product and regular development processes.


Get the power of unlimited phone numbers, text messages, and Slack channels.

Respond to messages

Easily answer senders, acknowledge messages, and reply to alerts with in-thread replies.

Free 7-day trial

Evaluate SMS to Slack risk-free for 7 days. Cancel anytime.

Simple pricing

Pay-as-you-go pricing, pay only for what you use.
No contracts, cancel any time.




per phone number


per Message part*

per Minute

Get Started


  • 7-day free trial
  • In-thread replies
  • Email support
  • Cancel any time

Frequently asked questions

Frequently asked questions about SMS to Slack. If you have a question that isn't answered here, please email us. We're happy to help!

How does it work?
Once you install SMS to Slack and configure billing, you can create a phone number and associate it with a Slack channel. When someone sends a text message to that number, it will post to the channel.
Which Slack messages will be sent via SMS?
Only replies to a thread initiated by an incoming SMS will be sent to the original sender via SMS. Any other Slack messages in the channel are ignored.
How long can I try the service?
SMS to Slack offers a 7-day free trial. Where you can test the service and see if it fits your needs.
* What are message parts?
A message part is a single SMS message that is sent to a phone number. If a message is longer than the character limit, it is split into multiple parts and sent as separate messages. Each message part is billed separately.
How are GSM-7 messages split into parts?
Messages containing only GSM 7-bit characters have a maxium limit of 1,600 characters. Messages longer than 160 characters are split into multiple message parts, each part consisting of 153 characters.
How are UCS-2 16-bit messages split into parts?
Messages containing one or more UCS-2 16-bit Unicode characters have a maximum limit of 737 characters. Messages longer than 70 characters are split into multiple message parts, each part consisting of 67 characters.
How are MMS messages split into parts?
Each MMS message can contain multi-media, and up to 1,600 characters. MMS are encoded in UTF-8 . Messages longer than 1,600 characters are split into multiple message parts.

Get started in
under 10 minutes

Say goodbye to the chaos of using your phone to handle all communication. Move all messaging communication to Slack, where you can keep all conversations organized and accessible to your entire team.

100% free to get started
Bring your own phone number
Friendly email support

“Streamlined the SMS workflow for our team in just a couple of minutes!”

Anthony Accomazzo
Anthony Accomazzo
Founder at

Join hundreds of happy customers

Add to Slack