What "Trello for Gmail" actually does
The official add-on lives in the Google Workspace Marketplace and adds a Trello panel to Gmail's right sidebar. Open an email, click the Trello icon, choose a board and list, optionally tweak the title, and it creates a card: subject as the title, message text in the description, with a link back to the email. That's the feature. Singular.
For what it is — free, official, thirty seconds to install — it's fine. The trouble is what people assume it is: a Gmail–Trello integration. When a user asked in the Atlassian Community whether it could do more, the assessment was blunt: the integration is "incredibly minimal — all you can do is add a task with a deadline". Three years and several million installs later, that's still the shape of it.
The seven things it can't do
1. Carry attachments
The card gets text. The PDF, the CV, the invoice — they stay in Gmail. If your emails matter because of their attachments, every card the add-on creates is a to-do item titled "go back to Gmail and get the file."
2. Add an email to an existing card
The add-on creates new cards only. The customer's follow-up about last week's request? It becomes a second, disconnected card — or nothing. There's no "attach to existing card" anywhere, and it's precisely what the community thread above was asking for.
3. Update when the thread moves on
The card is a snapshot taken at click-time. Replies never reach it, nothing signals that the conversation continued, and the description quietly goes stale. The link back to Gmail works — which is another way of saying the integration's answer to "what happened next?" is "go check Gmail."
4. Reply from Trello
Communication is strictly Gmail-side. From the card, there is no reading the thread and no replying — the add-on has no Trello-side presence at all. (Why replying from the card matters, and what it takes, is its own topic.)
5. Automate anything
You are the trigger. Every card is a manual click on an open email — no rules, no filters, no "every email from this sender becomes a card." Miss a day of clicking and the board is a day behind the inbox.
6. Show your inbox in Trello
The add-on brings Trello into Gmail, never Gmail into Trello. If the goal is to live on the board and stop tab-switching, this tool points the wrong direction by design.
7. Preserve the sender in any structured way
The sender ends up as plain text inside the description snapshot. No structured contact on the card, nothing to filter or route by — the same identity problem as email-to-board, arrived at from the other side.
To be fair: when the add-on is exactly enough
Occasional capture from the Gmail mobile app is the honest sweet spot — you're triaging on the phone, an email needs to become a task, and a text snapshot is all the task requires. Free, official, done. If that's your whole use case, stop reading and keep the add-on.
When you've outgrown it: match the wall to the fix
| The wall you hit | What fixes it |
|---|---|
| "I'm clicking this button 30 times a day" | Automation from a Gmail search — new matching mail becomes cards on its own (no Zapier required) |
| "The files never come along" | An inbox-connected power-up that puts real attachments on the card |
| "Cards go stale the moment someone replies" | Two-way thread sync — the card follows the conversation and badges new mail |
| "I still answer everything in Gmail" | Replying from the card, through your real mailbox |
| "I want the inbox itself on the board" | An OAuth power-up that displays and triages Gmail inside Trello |
All five fixes are one architecture: connect the mailbox to Trello (OAuth), instead of pushing snapshots at it. That's what Email Inbox is — your Gmail readable, replyable, and automatable inside the board, with emails private by default on shared boards. The four-methods comparison shows where it sits against the add-on, email-to-board, and Zapier.
The add-on's ceiling is our floor
Email Inbox brings the whole inbox into Trello: automations from any Gmail search, real attachments, live two-way threads, replies from the card.
Try Email Inbox free€4/member/month · 7-day free trial
Frequently asked questions
Is there an official Trello add-on for Gmail?
Yes — "Trello for Gmail" by Atlassian, free in the Google Workspace Marketplace, 9M+ installs. It creates a card from the open email: subject as title, body text as description.
Does it carry attachments onto the card?
No — text only. Files stay in Gmail and travel to the card by hand.
Can it add an email to an existing card?
No. New cards only — follow-ups become duplicates or get lost.
Does the card stay in sync with the thread?
No. It's a one-time snapshot with a link back. Replies never appear on the card.
What should I use once I've outgrown it?
For automation, attachments, live threads, or replying from Trello: an OAuth inbox power-up like Email Inbox. For occasional manual capture, honestly — keep the add-on.