Substack Messaging Extension

The Substack Auto Messenger Chrome extension is a tool designed to simplify communication with your Substack subscribers. It allows…

As of June 2026, Substack Messaging Extension has 114 users and a 5.00/5 rating from 2 reviews in the Developer Tools category.

Usersup 37.3 percent+37.3%
114
114
Ratingno change0%
5.00
2 reviews
Reviewsno change0%
2
Version
1.3.0
Manifest V3

History

10 snapshots

Tracking since Apr 3, 2026.

116.4898.580.52Apr 3, 2026Jun 11, 2026
View as table
DateUsersRatingReviewsVersion
Apr 3, 2026835.0021.3.0
Apr 17, 2026885.0021.3.0
Apr 23, 2026885.0021.3.0
Apr 27, 2026935.0021.3.0
May 5, 20261005.0021.3.0
May 10, 2026995.0021.3.0
May 16, 20261035.0021.3.0
May 29, 2026995.0021.3.0
Jun 5, 20261025.0021.3.0
Jun 11, 20261015.0021.3.0
Now1145.0021.3.0

Permissions & access

Permissions
activeTabstoragetabsscripting
Host access
https://*.substack.com/*, https://substack.com/*, https://extensionpay.com/*

Screenshots

Substack Messaging Extension screenshot 1

About

The Substack Auto Messenger Chrome extension is a tool designed to simplify communication with your Substack subscribers. It allows you to send personalized or generic messages directly to your subscribers efficiently. 

Here's how it works:

1) Install the Extension
- Download and install the Substack Auto Messenger Chrome extension from the Chrome Web Store.

2) Navigate to the Correct Page
- Log in to your Substack profile.
- Go to your Subscribers page at this exact link:
https://yournewsletter.substack.com/publish/subscribers
(Make sure there’s nothing added to the link after “subscribers.”)

3) Open the Extension
Click on the Substack Auto Messenger extension icon in your Chrome toolbar. Buy your monthly subscription in order to use the extension. To do that, click on the "Buy Now"  button, which will open a new window.

4) Compose Your Message
- Use the provided text box to write your message.
- Limit the recipients to up to 50 subscribers at a time
- Double-check your message before sending.

5) Keep the Subscribers page open while the extension runs.
The extension will indicate whether messages are successfully sent.

6) Best Practices
Message Size: Keep messages concise and meaningful.
Batch Sending: Avoid sending too many messages at once to maintain smooth operation (you can send max. 50 messages at once).
Monitor Progress: Watch the extension's status updates to ensure all messages are sent correctly.

With this tool, you can efficiently manage your communication, welcome new subscribers, and strengthen engagement with your Substack audience.

Technical

Version
1.3.0
Manifest
V3
Size
33.74KiB
Min Chrome
88
Languages
1
Featured
No

Metadata

ID
ljlojmjecdpmomhinccabcnboiidnbpd
Developer ID
u40d974fb34e82e68cffbf05789009bc1
Developer Email
[email protected]
Created
Mar 5, 2025
Last Updated (Store)
Mar 26, 2026
Last Scraped
Jun 11, 2026
Website
Support URL

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Data sourced from the Chrome Web Store · last verified Jun 11, 2026.