Dropbox
The Dropbox integration lets you share files and documents hosted in your Dropbox account directly into Missive conversations. You can add a file in an internal chat conversation or an email draft.
This is especially convenient to share large files with your colleagues or email recipients.
Open the integration settings and add the Dropbox integration. Now, whenever you draft a new conversation or post a comment you will have the option to pick a document from the file browser or your Dropbox account.