Clerk - Slack SMS

Bring your business phone to Slack and start text messaging your customers in real-time. Confirm appointments, ask for reviews, offer promotions, the possibilities are endless.


Finally, an SMS service built entirely for Slack.

Either bring your existing number, or choose your own, and immediately give your business line super-powers inside of Slack.

Add To Slack

Send and Receive SMS in Slack

Like a cellphone for your entire team, forward SMS to a Slack channel and let your team gain visibility to customer requests and messages in real-time. No more reliance on one central cellphone or VoIP system with missed messages and upset customers.

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Slack SMS

Support Customers on WhatsApp

Add your business phone line to any channel and even bring multiple numbers to multiple channels, it is entirely up to you. Clerk keeps your external SMS and WhatsApp conversations in threads or channels all inside of Slack.

Add To SlackFree
Slack SMS

Features Customers Love

2FA Verification Codes

Receive your account verification codes and access your shared accounts easily, and securely with Clerk Non-VoIP numbers.

Twilio Slack Integration

Connect Twilio to send, receive, and reply to SMS and MMS messages from Slack in realtime.

WhatsApp Slack Integration

Send and receive WhatsApp text messages, pictures, videos, audio, GIFs, and documents all in your Slack workspace.

Slack SMS

Bring Your Own Number to Slack

Connect your existing carrier and enjoy all of the benefits and features of Clerk while keeping your service provider contracts, phone numbers, and rates.


RingCentral for Slack integration brings your phone number natively into Slack.


Enable your Twilio phone number in Slack and consolidate communication.

Zoom Phone

Host the SMS portion of your Zoom phone number and use it directly in Slack.


Enable your Vonage phone number in Slack and consolidate communication.

Google Voice
Google Voice

Consolidate your google voice conversations in Slack

VoIP / Landline

Enable SMS capabilities on your existing VoIP or a landline.

Scheduled Slack SMS Campaigns

95% of SMS are read in the first 5 minutes. Included in all plans, you can start sending important alerts, thousands of messages, marketing campaigns or promotions in one click. You can even schedule multiple SMS campaigns minutes, days and weeks in advance.

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Clerk SMS Campaigns

Your Business Phone in Slack

Enable powerful add-ons that turn Slack into a telephony powerhouse all simplified in the app you already love.

Additional Numbers

Want to give customers the ability to text several numbers? Maybe you need a different number for customer support, sales or appointments.

IVR Menu

Interact with callers and gather information by giving them choices via a menu. Performs business actions based on the answers.

Toll Free Numbers

1-800 numbers are also supported in Clerk! Let your customers text your global support system, right in Slack.

Call Forwarding

Never miss a call with Clerk - push all incoming calls to a number of your choice.


Let your customers leave you a voicemail. The message gets automatically transcribed so you can both listen to it or read it right in your Slack channel.


Don't leave your clients hanging. Setup automatic responses and keywords for when your business is closed or for the first time a client texts you to welcome them.

Pricing plans

Give your customers a whole new way to interact with your business.

per month
  • 250 SMS
  • Unlimited Users
  • 1 Phone Number
per month
  • Customized Limits
  • Whiteglove Onboarding
  • Account Manager
SMS / MMSUnlimited*250 / mo
Phone Numbers11
Unlimited Team Members
Unlimited Slack Channels
Unlimited Contacts
Bring Your Own Number
Scheduled Messages
SMS Campaigns
Phone Number$9.99 / mo
Voicemail$4.99 / mo
Call Forwarding$9.99 / mo
Automation$9.99 / mo
IVR Menu$9.99 / mo
NonVoIP Number$59.99 / mo
WhatsApp Integration$59.99 / mo
International PlanContact Us

*Prices reflect US/Canada ONLY. International pricing varies. Subject to fair use policy.

Trusted by leading companies

From startups to the Fortune 500, Clerk is the most visual and simple way for teams to comminicate via text message in Slack.

Samsung Next
2nd Address
Jungle Scout

Quick Start Guides

Add Clerk, send SMS and get to work.

Slack 101
Slack 101- Intro To Slack

Watch this video for a quick tour on how to get started in Slack.

Slack 101
Intro To Clerk - Send Your First SMS

Step-by-step guide to get Clerk up and running on your Slack team.

Helpful answers

We know there's a lot to learn and read about all that Clerk can do. Here are some of the most frequently asked questions.

Send and receive text messages, mms, with our native Slack app. SMS for Slack is perfect for customer support, marketing, and team communication.

Yes. Clerk allows to send and receive txt messages coming from your phone number. Just let us know what number or area code you would like to use and we will set it up.

Yes. Clerk allows you to have a unique phone number in every Slack channel.

Integrate WhatsApp to send and receive messages, share files and automate communication with customers all in Slack.

Yes. Our bulk texting service lets you reach large groups of people with a single text. The group size can be small, medium, large, or huge. It all depends on the number of contacts in your addressbook.

Use Clerk the same way you would use your mobile phone. Both emoji and image messages are suported.

Clerk helps you navigate the WhatsApp for Business sign up process through streamlined, end-to-end onboarding. We enable users to take advantage of all WhatsApp has to offer all in Slack.

Clerk has a number of unique integrations with tools such as Hubspot, Gsuite, Salesforce.

*Chat with us! Talk to a real customer success specialist, respond in less than 90 seconds hours 8:00 am - 8:00 pm EST