Clerk - SMS for Slack

Customers, contractors, and partners never have to install an app to message your team. It’s perfect for keeping track of customer support, operations, and sales messages. Confirm appointments, ask for reviews, offer promotions, the possibilities are endless.


Easy, Secure, and Reliable Business Text Messaging

Text messaging has a 98% open rate and over a 50% reply rate. Clerk allows you to engage with leads more efficiently and reduce the time it takes to qualify them.

Clerk - SMS for Slack | Product Hunt Embed
Image placeholder
Start a new business text conversation from Slack

Using Clerk command to send business text messages to any of your contacts. It's simple for people to text your existing business phone number. Or get a new phone number. Your team will see the customer’s messages in Slack and can reply. And since it’s Slack, all messages are searchable for future reference.

Get Started Today
Image placeholder
Read and reply to SMS on any mobile phone

Use your desktop computer, iPad or a cellphone through the Slack app and get notifications instantaneously when someone texts your company. Reach your customers faster: 98% of text messages are read within the first few minutes that they are received.

Try For Free
Image placeholder

Industries that love Clerk

Start texting your customers today. Keep your company’s text messages organized and secure with Clerk.


Reach your customers faster and grow your customer base more efficiently. Close sales by answering customer questions quickly.

Law Firms

Attorneys, paralegals, and assistants can schedule and confirm legal appointments, submit document requests, and confirm court dates.

Insurance Agencies

Send text messages to reach your team on the mobile devices that they are already using.

Image placeholder
Real Estate

Connect with prospects and close more deals. Create a better customer experience.

Support Teams

Increase efficiency of your support teams and handle multiple customer issues simultaneously all in Slack.

Medical Offices

Send SMS to confirm appointments, change treatments, or ask questions. SMS enable your business phone number, while keeping the existing voice service intact.

Pricing plans

Choose the best plan for your business. Try for free, no credit card required.

per month
per month
Features Professional Starter Free
SMS Per Month 750 250 10
Additional SMS $0.03 / sms $0.04 / sms n/a
Unlimited Team Members
Address Book
Import Contacts
Local Area Code
Bulk Messaging
API Access
Priority Support

*Prices reflect US/Canada ONLY. International pricing varies.

Image placeholder
Image placeholder
Image placeholder
Image placeholder
Image placeholder
Image placeholder

Integrate with tools you love

Clerk connects with a number of platforms right out of the box. All the contacts from your CRM are instantly available in Slack.

Essential Add-ons

Incorporate additional features into your business - get your Clerk superpowers now!

Import Your Number

Give your customers the option to text directly to your business landline, VoIP, or toll-free number. You'll still be able to receive calls as usual.

Additional Numbers

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

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.


The essential classic: let your customers leave you a voicemail right in Slack. The message is uploaded as a .mp3 so you can listen right away.

Call Transcription

Let customers leave you a message and have Clerk automagically transcribe everything into text, right in Slack.

2 Factor Authentication

Work in IT, banking or consulting and need to share 2FA with members of your team on behalf of clients? We can enable this work flow instantly.


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

*Add-ons priced separately

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
Image placeholder
Chris Carella
Five Four Ventures

I have used many tools over the last 5 years to communicate with my customers over SMS and Clerk has been, by far, the fastest and easiest way to get setup. In no more than 5 minutes I had a phone number connected to a slack channel and was communicating seamlessly with customers.

Image placeholder
Stella Fulman
Audiology Island

Clerk has revolutionized how our office communicates with patients. Our patients have given us great feedback on how easy communication has become with our staff. We’ve always prided ourselves on being industry leaders for hearing treatment; now, we can be industry leaders for technology, too.

Image placeholder
James Patrick
Clayton Asset Group

Clerk offers some of the best customer service around. We installed Clerk and had questions on how to send an SMS campaign from Slack. We reached out and were able to get Clerk support team on a call with us in a matter of minutes. They helped our team get up and running in no time.

Image placeholder
Nick G.
Stillwater Properties

After searching for hours and hours for an app that would be capable of sending mass sms texts using a different number, I finally came across clerk. It is painless to setup, very powerful and at the best price point. I have never experienced such good customer support in an app. Highly recommend!

Image placeholder
Ronald Savage
Greenworks Realty

Wow! Incredble that this is all built on top of Slack. I played around with the Hubspot integration and was shocked how seamless and quick the experience was. Clerk really cuts down on response time when communicating with our clients. It has become essential toolbox in our arsenal.

Quick Start Guides

Add Clerk, send SMS and get to work.

Slack 101- Intro To Slack

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

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.

Absolutely. Please reach out to and we will get back to you asap.

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.

SMS standard has a character limit of 160 characters. Messages using non standard characters such as emojis are limited to 67 characters.

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