Substack Messaging Extension icon

Substack Messaging Extension

by Kleio Tech · Developer Tools
Manifest V3 in_app
View in Chrome Web Store Data as of 16 Oct 2026

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

Users
132
−2 in 30 days
Rating
3.7 / 5
unchanged in 30 days
Ratings
3
0 in 30 days
Store rank
#76K
#63K among extensions
Version
1.3.1
updated 13 Jul 2026

Users

monthly, 2 years
066132Mar 2025Jan 2026Oct 2026
Latest, 16 Oct 2026: 132 usersMove the mouse over the chart for any month

Ratings count

monthly, 2 years
023Mar 2025Jan 2026Oct 2026
Latest, 16 Oct 2026: 3 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About Substack Messaging Extension

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.

Growth

WindowUsersChangeRatingsRating
7 days+2+1.5%00.00
30 days−2−1.5%00.00
6 months+43+48.3%+1−1.33
1 year+100+312.5%+1−1.33

Chrome Web Store search rankings

Where Substack Messaging Extension appears when people search the store, with the 30 day change
Search phrasePosition30 days
momentum#27−1

Version history

12 versions recorded
1.3.113 Jul 2026
1.3.026 Mar 2026
1.2.025 Mar 2026
1.1.727 Feb 2026
1.1.66 Jan 2026
1.1.521 Dec 2025
1.1.413 Dec 2025
1.1.328 Apr 2025

Details

Category
Developer Tools
First seen
5 Mar 2025
Size
34 KB
Languages
en
Pricing
in_app
Privacy policy
write-with-tools.com
Extension ID
ljlojmjecdpmomhinccabcnboiidnbpd

Permissions and risk

Moderate riskimpact 2, likelihood 2
Permissions
activeTabstoragetabsscripting
Site access
https://*.substack.com/*https://substack.com/*https://extensionpay.com/*

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