Inboxes in Synced, the AI inbox assistant, are the accounts messages come in through: Gmail, Outlook, Slack, Microsoft Teams, WhatsApp Business, Instagram Business, Messenger, SMS through Twilio, and GroupMe. Synced reads new messages from each Inbox and writes an Action Plan for them. Output integrations (Google Drive, OneDrive, Google Calendar) are different: Synced uses them for context and to create events, not as message sources. Inboxes are unlimited on every plan.
Inboxes vs. output integrations
Synced's connections do one of two jobs. An Inbox is somewhere people send you things, so Synced watches it and acts on what arrives. An output integration is somewhere Synced goes to get something: a file to attach, a free slot on your calendar, an event to create. The distinction matters for what you connect first and which plan you need.
| Inboxes | Output integrations | |
|---|---|---|
| What Synced does with it | Reads new messages, writes Action Plans, sends replies you approve | Searches files, attaches them, checks availability, creates events you approve |
| Live today | Gmail, Outlook, Slack, Microsoft Teams, WhatsApp Business, Instagram Business, Messenger, SMS (Twilio), GroupMe | Google Drive, OneDrive, Google Calendar |
| Coming soon | iMessage | Dropbox, Notion, GitHub |
| Shows up in Messages | Yes | No |
More connectors, from Jira to QuickBooks, are listed as coming soon in the app.
What each Inbox brings into Synced
- Gmail and Outlook: email threads, attachments, and invites. Connecting Outlook also covers that account's calendar.
- Slack: your direct messages and group DMs, which Synced can read and reply to after you approve.
- Microsoft Teams: your Teams chats.
- WhatsApp Business and Messenger: messages to your business number or Facebook Page.
- Instagram Business: DMs to a business account.
- SMS: texts sent to your Twilio number. GroupMe: the groups you choose.
Each integration page has the connection steps and permissions for that tool. First-time setup, including the Gmail connection new accounts start with, is on get started.
One conversation list across every Inbox
Messages from all your Inboxes land in one list, each thread marked with where it came from and summarized so you can see what it wants without opening it. Filters narrow it down: Primary for direct mail, Action Needed for threads with something waiting on you, plus Sent, Scheduled, Starred, Snoozed, and Trash.
An illustration. The reply goes back through WhatsApp Business once you approve it.
Replies go back out through the same Inbox the message came from. A WhatsApp question gets a WhatsApp answer, a Slack DM gets a Slack reply, and an email reply stays in the original thread.
Multiple accounts and plan limits
Inboxes are unlimited on every plan, so a work and personal Gmail, two Outlook accounts, and a Slack workspace can all be connected at once. When you have more than one email account, the draft shows a From picker and you can set one as the default. What differs by plan is which tools you can connect: Free covers Gmail, Google Drive, OneDrive, and Google Calendar, and Pro includes all integrations. The weekly Action Plan count is shared across every Inbox you connect.
Disconnecting an Inbox
Remove any Inbox from Settings and new messages from it stop showing up. For Google accounts you can also revoke access at myaccount.google.com/permissions. A couple of Inboxes need one more step on the provider's side: a Twilio number's webhook keeps pointing at Synced until you change it in Twilio, and the GroupMe bot stays in a group until you remove it there.
Where Inboxes stop
iMessage isn't connectable yet; it's listed as coming soon. Zoom has no connector at all. And Synced isn't a replacement mail client for power filtering or rules; if you need complex server-side rules, keep them in Gmail or Outlook and let Synced work on what reaches you.