Connect Slack to Trello
Automate workflows between Slack and Trello. No coding required.
What you can automate between Slack and Trello
These are the most popular automations teams set up between Slack and Trello. Each one runs automatically once activated — no manual steps.
Create item when new message received
Add a new task, page, or item automatically when when a new message arrives in a channel.
Send message when new item created
Post a message to a channel automatically when when a new task, page, or item is created.
Sync Slack changes to Trello
Keep Trello updated when when someone mentions you or your team.
Get Slack alerts for Trello
Never miss important Trello updates with instant Slack notifications.
What syncs between Slack and Trello
Key messages and action items from Slack automatically create tasks or pages in Trello. Turn conversations into trackable work items.
Data from Slack
- Messages
- Channel posts
- Mentions
- Thread replies
- File attachments
Data from Trello
- Tasks
- Pages / documents
- Database items
- Status updates
- Assignees
How to connect Slack to Trello
Follow these steps to set up your integration. The entire process takes under 5 minutes.
What you'll need
- An active Slack account with permission to install apps
- An active Trello account
- A free Arahi AI account (sign up takes 30 seconds)
Create your Arahi AI account
Sign up at app.arahi.ai — it's free and takes 30 seconds. No credit card required. You'll land on the dashboard where you can create your first workflow.
Authenticate Slack
Click "Add Connection" and select Slack from the app directory. You'll be redirected to Slack's authorization page. Grant Arahi permission to read and post messages in your selected channels. You control which channels the integration can access.
Authenticate Trello
Same process for Trello. Click "Add Connection," select Trello, and authorize access. Grant Arahi access to your workspaces, databases, pages, and tasks. You select which workspaces the integration can read and write to.
Choose your trigger
Select what event starts the workflow. For this integration, popular triggers include: new message received in slack or new item created in trello. The trigger fires automatically whenever that event happens — no manual intervention.
Configure the action
Define what happens when the trigger fires. For example: create item in trello. Map the data fields between Slack and Trello so the right information lands in the right place.
Test and activate
Run a test to confirm data flows correctly between Slack and Trello. Check that the fields map as expected, then toggle the workflow on. It runs 24/7 from here — Arahi handles retries, error logging, and monitoring automatically.
Why connect Slack and Trello?
Conversations in Slack create work. Tasks in Trello generate updates. Without automation, your team wastes time relaying information between the two. Connect them and let context flow automatically.
Tips for your Slack + Trello integration
Get more out of this integration with these best practices.
Who uses the Slack + Trello integration?
Teams across industries connect Slack and Trello to streamline their workflows.
Team leads managing multiple channels who rely on Trello for productivity
Project management offices who need real-time data from Slack
Remote teams and project management offices collaborating across tools
Frequently asked questions
Everything you need to know about connecting Slack and Trello.
How do I connect Slack to Trello?
Sign up for a free Arahi AI account, then click "Add Connection" to authenticate both Slack and Trello via OAuth. Choose a workflow template — like syncing communication events to productivity actions — customize the field mapping, and activate. The entire setup takes under 5 minutes.
What can I automate between Slack and Trello?
Popular automations include: create Trello tasks from Slack messages, post Trello deadline reminders to Slack channels, update Trello item statuses when Slack reactions are added, and archive completed Trello tasks in Slack threads. You can also trigger custom workflows from specific Slack keywords.
Is the Slack and Trello integration free?
Arahi AI includes 100 free actions per month on the Starter plan — enough for most small teams. If your Slack-to-Trello workflows need more volume, paid plans start at $29/month with unlimited workflows and priority execution.
Is my Slack data secure when connected to Trello?
Yes. Arahi uses OAuth 2.0 for authentication — we never store your Slack or Trello passwords. All data is encrypted in transit (TLS 1.3) and at rest (AES-256). Your communication data is only accessed when a workflow runs, and you can revoke access at any time from your Arahi dashboard.
Can I sync data both ways between Slack and Trello?
Yes. You can set up workflows that trigger from either Slack or Trello. For example, create a workflow where Slack events update Trello, and a separate one where Trello changes sync back to Slack. Each direction is configured independently so you have full control.
Do I need technical skills to connect Slack and Trello?
No coding is required. Arahi's visual workflow builder lets you configure triggers, actions, and field mapping with clicks. If you can use Slack and Trello, you can set up the integration. Most users are running their first workflow within 10 minutes.
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