Send unlimited, customized and personalized bulk direct messages from Google Sheets™ to Slack
Listing updated:June 13, 2025
Works with:
15K+
Overview
Mass Slack DMs - Send & Schedule Bulk Messages

Mass Slack DMs transforms Google Sheets™ into a powerful communication tool that lets you send personalized messages to your entire Slack team in seconds instead of hours. Now with scheduling capabilities - send messages immediately or schedule them for the perfect time!
KEY BENEFITS

Save Hours Weekly: Automate messaging to team members and stakeholders
Schedule for Impact: Set messages to send at optimal times when your team is most active
Personalize Every Message: Use dynamic fields to customize each message
Track Delivery: Monitor which messages have been successfully delivered
Maintain Privacy: No data stored outside your Google Sheets™

HOW IT WORKS - SIMPLE 3-STEP PROCESS

Create a Slack Bot: Set up a bot through the Slack app at api.slack.com
Connect the Add-on: Install from marketplace and enter your bot details
Send or Schedule: Create a sheet with recipient emails, your message, and choose to send now or schedule for later!

Get started here: https://www.massslackdms.com/post/getting-started-send-mass-slack-messages
POWERFUL PERSONALIZATION
Customize messages using dynamic fields with the {{Column_heading}} format. For example, write "Hello {{Name}}, your {{Project}} is due on {{Deadline}}" and each team member will receive a personalized message with their specific information.
NEW: SCHEDULE SEND FEATURE
Take your messaging to the next level with scheduled sends:

Perfect Timing: Schedule messages up to 3 months in advance
Timezone Control: Send at the right time for your global team
Automated Delivery: Set it and forget it - messages send automatically
Easy Management: View, modify, or cancel scheduled messages anytime
Smart Notifications: Get Slack alerts when scheduled messages start and complete

Learn more about scheduling at https://www.massslackdms.com/post/how-to-schedule-send-your-slack-messages
POPULAR USE CASES

Team Communication
1.1. Onboarding: Welcome new employees with personalized resources and contact information
1.2. Announcements: Share important news, updates, or policy changes in a personalized way
1.3. Emergency Alerts: Notify employees about urgent issues requiring immediate action
Project Management
2.1. Deadline Reminders: Send personalized reminders about upcoming due dates (schedule them in advance!)
2.2. Status Updates: Keep stakeholders informed about project progress
2.3. Weekly Check-ins: Schedule recurring project updates for consistent communication
Team Engagement
3.1. Surveys & Feedback: Distribute surveys or request input on specific initiatives
3.2. Event Invitations: Send personalized invites and reminders for meetings or webinars
3.3. Training Opportunities: Share development resources with targeted team members
3.4. Time-Sensitive Updates: Schedule announcements to go live exactly when needed

PLANS & PRICING
The free version allows unlimited messages with a small watermark.
Our affordable paid plans remove the watermark, provide priority email support, and unlock advanced features including scheduling capabilities. See all options at https://www.massslackdms.com/
PRIVACY & SECURITY
Your data stays in your Google Sheets™ – we never store or transfer your information. Mass Slack DMs is fully GDPR compliant, as all recipient data remains exclusively within your Google Workspace environment.
GET STARTED TODAY
Install now to save hours of manual messaging time! Set up your first bulk message in under 5 minutes, and start scheduling messages for maximum impact.
Share your feedback and feature requests here: https://forms.gle/Y5qSrFeJZ1qzfov89
Additional information
PricingFree of charge with paid features
Developer
Privacy policy
Terms of service
Mass Slack DMs will ask for the permissions shown below. Learn more
Mass Slack DMs will need access to your Google account
This will allow Mass Slack DMs to :
See, edit, create, and delete only the specific Google Drive files you use with this app
See, edit, create, and delete all your Google Sheets spreadsheets
Display and run third-party web content in prompts and sidebars inside Google applications
Connect to an external service
See your primary Google Account email address
See your personal info, including any personal info you've made publicly available
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David
November 18, 2023
Honestly, this product is super useful for its ease of use and price. I love how you can use this with Google Sheets and with an add-on that makes everything work. I recommend it to anyone who is trying to use this for mass DMs. I also really like that you can connect multiple Slack workspaces from one license account; I really appreciate that. Recommend it!
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