Free Google Docs Add-On To See and Discuss Changes Made to Docs: Letter Feed Messenger

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Letter Feed Messenger is a great freeware Google Docs add-on that’s available for both the Docs and Sheets modules of Google’s online office suite. Currently, it supports only Google Chrome. Letter Feed Messenger enhances the already strong collaborative features of Google Docs by adding instant messaging capabilities to your documents. Thus, you can instantly see and track any changes that are being made to any collaborative document(s) by multiple collaborators, all in real-time.

Now, Google Docs already has a built-in Comments section in which various collaborators can chat. What Letter Feed also does, in addition to its instant chat, is that it shows the stream of changes that are being done. So, whenever someone adds something, or deletes something, or changes something; Letter Feed will show all that as a stream in its instant messenger.

Here is an animated graphic that shows this messenger in action:

docs with letter feed messenger

How to add Letter Feed Messenger add-on to Google Docs and Sheets

Adding Letter Feed Messenger add-on to the Docs and Sheets modules is just a matter of few clicks. Like any web service that requires access to your online account(s), all you have to do is grant Messenger access to your Google Docs and Sheets. You can add messenger individually to both Docs and Sheets from its homepage itself. Here’s how to do it (the process is exactly the same for both Docs and Sheets).

Step 1: Go to Letter Feed Messenger’s homepage, and add it to Docs or Sheets by clicking the respective button at the bottom of the homepage.

docs and sheets messenger buttons

Step 2: Once you do that, Messenger asks your permission to run. After you allow it to run, it works its magic for a few seconds and finally lets you know by a pop-up that it can be run via the add-on menu.

messenger start menu

Step 3: That’s it. Once you start messenger from the add-ons menu, it appears as a side-bar on the right of the collaborative document (or spreadsheet) that you’re working on. Check out the screenshot below:

sample collaborative doc messenger


How to use Letter Feed Messenger to view and discuss changes to your Docs and Sheets?

Using Letter Feed Messenger is extremely simple. If you want to view and discuss changes on a collaborative document that you and your team members are working on, all you have to do is run Messenger from the Add-ons menu, and start working on your document (All of the collaborators need to have Letter Feed Messenger add-on installed as well). Any changes (addition, deletion, edits etc.) you and the other collaborators make to the document automatically appear in Letter Feed Messenger. Apart from that, you can chat with other collaborators using Messenger.

Pretty cool, isn’t it? The above animated graphic shows a few nifty features of Letter Feed Messenger. They’re briefly mentioned below:

  • Letter Feed Messenger logs both the real-time IM conversations between collaborators, as well as the changes that are made to the collaborative document.
  • Chats appear as normal text.
  • Any new additions to the document (for example, adding a new line) appear with Green highlighting in Letter Feed Messenger.
  • Any removals from the document (for example, deleting an existing line) appear with Red highlighting and strike-out lines in Letter Feed Messenger.
  • Letter Feed Messenger also features name-stamps with checkmarks and timestamps to notify you which collaborators have seen the changes, and when.

That’s all there’s to it. Letter Feed Messenger works exactly the same way for Google Sheets as well. All you have to do is add it to your browser, and run it from the Add-ons menu when you start working on any collaborative Google Docs or Sheets. Wasn’t that hard now, was it?


Letter Feed Messenger is a great freeware add-on, especially more so for those who rely a lot on Google’s online office suite for their daily productivity needs (myself included). Although Google Docs already has a similar comments functionality, where collaborators can chat with each other regarding changes being made to the collaborative documents, Letter Feed Messenger takes it a notch further by merging chat and document changes in a single interface. Other features, like different colored highlights for the changes to the document(s), and seen timestamps are added goodies as well. I suggest you give it a try, it might just be what you need.

Get Letter Feed Messenger Here.

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