Hello Ajay!

Here is the information I found from Intercom: 

Yes, you can use Intercom to manage and send email newsletters and regular updates to your users, in addition to support and messaging. Our Outbound feature allows you to create and send targeted emails—either as one-off messages or as part of ongoing campaigns. You can use customizable templates, segment your audience, and personalize content based on user attributes and behavior .

Intercom also supports managing multiple email lists with granular subscriptions, so you can organize different types of newsletters or updates and let users opt in to what interests them . All emails include unsubscribe links, and you should ensure users have opted in to receive marketing emails

Personally, I think Intercom offers all the tools necessary to create a great newsletter with the added benefits of all their others tools like Fin and workflows. Just be sure to take a look at the pricing as I believe it may vary according to the audience size and messages sent.

Hope this helps! :)