People do not have one Gmail. They have work, school, and a personal address that still gets the dentist. InboxSift’s account switcher is for that reality.
Follow the tab
The overlay is meant to match the Gmail account you already opened in Chrome. Do not expect a fake combined inbox that pretends another account is connected.
Connect the account you are looking at
Gmail read access is OAuth per Google account. To classify another inbox, open that Gmail and sign in with it. Briefing and contacts are scoped by account email.
What you will see
The sidebar can list personal, work, and school with unread-style counts for InboxSift’s view. Your regular Gmail inbox remains in Gmail’s own sidebar.
Frequently asked questions
- Can I merge three inboxes into one Briefing?
- Not as a single pooled mailbox. Switch accounts. Each Briefing is honest about which inbox it read.
Sources & further reading
Published 2026-09-04. See also our full article library.