SMS Relay by Lehman Software

Lehmansoftware LLC

TL;DR: This is a free service. Use at your own risk. We don't store your data.

Program Description

SMS Relay is a Slack bot that bridges your Slack channels with SMS. When you subscribe, messages posted in the channel are forwarded to your phone via SMS. You can reply directly via SMS and your response will be posted back to the Slack channel.

Sample Messages

Examples of messages you might receive or send:

How to Subscribe

Users opt in by entering their phone number in their Slack profile. The opt-in process works as follows:

  1. Open your Slack profile and click "Edit"
  2. In the "Edit About me" dialog, locate the SMS Relay field
  3. Enter your phone number in the format 555-555-5555
  4. Review the consent notice displayed below the field
  5. Click "Save Changes" to complete your opt-in

At the point of opt-in, users see the following consent notice:

"Enter phone number (555-555-5555) to receive Slack messages via SMS. By doing so, you are allowing to receive SMS communications from Lehman Software LLC. message and data rates may apply. reply STOP to opt-out."

See below for a screenshot of the opt-in process:

Screenshot showing the SMS Relay opt-in field in Slack profile settings

To opt out, users can either remove their phone number from this field or text STOP to the SMS number.

Privacy Policy

What Data We Collect

To provide this service, we collect and process:

How We Use Your Data

Your data is used solely to relay messages between Slack and SMS. Messages are processed in real-time and are not stored after delivery.

What We Don't Do

Terms of Service

By using SMS Relay, you agree to the following:

Message Frequency

Message frequency varies based on activity in the Slack channels you subscribe to. You will receive one SMS per channel message.

Message and Data Rates

Standard message and data rates may apply. Check with your carrier for details.

Opt-Out Instructions

You can stop receiving messages at any time:

Contact

For support or questions, email us at info@lehmansoftware.com

Last updated: February 2026