Connect Slack to Trello

Keep Slack and Trello in step without copying records between them by hand. Autonoly watches Slack for the events you care about and runs the matching action in Trello — on a free plan, with no code and nothing to host.

What you can automate between Slack and Trello

When → Then

Message containing keyword in Slack → Create card in Trello

When → Then

Message with specific reaction in Slack → Move card between lists in Trello

When → Then

Message posted in channel in Slack → Add comments in Trello

When → Then

Interactive button clicked in Slack → Attach files in Trello

When → Then

User joined channel in Slack → Assign members in Trello

When → Then

Form submission received in Slack → Add labels in Trello

Slack triggers and Trello actions

Slack triggers

  • Message containing keyword
  • Message with specific reaction
  • Message posted in channel
  • Interactive button clicked
  • User joined channel
  • Form submission received

Trello actions

  • Create card
  • Move card between lists
  • Add comments
  • Attach files
  • Assign members
  • Add labels
  • Create checklists

How to connect Slack to Trello

  1. Connect your Slack workspace. Authorize Autonoly to access your Slack workspace with secure OAuth authentication
  2. Configure bot permissions. Choose which actions Autonoly can perform in your workspace, controlling access at the channel level
  3. Connect your Trello account. Authorize Autonoly to access your Trello boards with secure authentication
  4. Select board access. Choose which boards Autonoly can modify and monitor
  5. Pick your trigger and action. Choose the Slack event that should start the workflow, then the Trello action it should run. Add a condition step if only some records should pass through.
  6. Test with one record, then turn it on. Run the workflow once against a real record and check the result in Trello before enabling it.

What to watch when syncing Slack into Trello

Decide the direction of truth

When both systems can change the same field, name one as authoritative or you will get a loop where each overwrites the other.

Filter at the trigger

Keep drafts and test records out by adding a condition immediately after the trigger rather than cleaning up downstream.

Handle the failures

Decide what happens when the destination rejects a record: retry, skip and log, or stop the workflow. Silent failure is the worst option.

Start with one record

Run the workflow once against real data and check the result before enabling it on everything.

Frequently asked questions

How do I connect Slack to Trello?

Connect both accounts to Autonoly, choose a Slack trigger such as “Message containing keyword”, then pick the Trello action you want to run. The workflow goes live as soon as you save it — there is no code to write and nothing to host.

Is the Slack to Trello integration free?

Autonoly has a free plan you can build and run this workflow on. Paid plans add volume and advanced steps. See the pricing page for current limits.

How quickly does data sync between Slack and Trello?

Workflows run as soon as the Slack trigger fires. You can also run them on a schedule if you would rather batch updates than send them one at a time.

Can I filter which Slack records reach Trello?

Yes. Add a condition step between the trigger and the action, and only records matching your rule continue. This is the usual way to keep test or draft records out of a production system.

Do I need a developer to set this up?

No. The builder is visual, and both Slack and Trello connect through standard authentication. If you do want code, you can drop into a script step at any point in the workflow.

More Slack and Trello integrations

Connect Google Sheets to SlackConnect Slack to GitHubConnect Slack to JiraConnect Slack to HubSpotConnect Slack to StripeConnect Slack to ShopifyConnect Slack to NotionConnect Gmail to Trello

Related automations, guides and terms

More on automating Slack and Trello.

IntegrationTrello integrationTransform your boards into powerful automation hubs with intelligent card management, automated workflows, and cross-board coordination.Guide10 Browser Tasks Every Small Business Should Automate TodaySmall businesses lose over 100 hours every month on repetitive browser tasks that an AI agent could handle in minutes. This guide covers the 10 highest-impact browser tasks you should automate — from downloading vendor invoices to reconciling data across disconnected systems — with specific time savings, real examples, and plain-English instructions you can give an AI agent to get started immediately.GuideHow to Transfer Data Between Web Apps That Don't IntegrateBusinesses use dozens of SaaS tools, but many simply do not connect to each other. When there is no API, no Zapier connector, and no native integration, teams resort to manual CSV exports, copy-paste, and data re-entry. This guide covers every practical approach to bridging the integration gap — from manual workarounds to AI browser automation — with honest comparisons of when each method makes sense.IntegrationGmail integrationRevolutionize your email workflow with intelligent filtering, automated responses, and seamless integration with your business processes.IntegrationAsana integrationSupercharge your project management with automated task creation, intelligent assignment, and progress tracking.IntegrationDiscord integrationEnhance your Discord community with automated moderation, interactive experiences, and powerful event-driven workflows that scale.AutomationAggregate Social Media Mentions AutomaticallyCollect brand or topic mentions across multiple social platforms and aggregate them in a single Google Sheet for unified analysis.AutomationArchive Emails as PDFs AutomaticallyAutomatically convert important emails and their attachments into PDF files for long-term archival and compliance.