Slack + Trello integrations: unlimited possibilities

Slack logoSlack > Trello
Trigger
Last triggered
Slack logoMessage sent to channel
Trello logoAdd card to list
Overview
Connect Slack to Trello in just a few clicks, for free, with Relay.app. Relay.app provides seamless integration between Slack, Trello, and many other popular SaaS applications.
Check below for example workflows using Slack and Trello, as well as a list of the triggers and actions Relay.app supports today. Just let us know if we're missing anything you need.
Known for its combination of simplicity and power, Relay.app is a tool that people love for its deep & easy-to-use integrations, powerful AI features combined with human oversight, robust workflow essentials, and first-class customer support.

Screenshots of Slack and Trello integrations in Relay.app

Send and reply to messages by integrating Slack into your workflow.
Send and reply to messages by integrating Slack into your workflow.
Preview of Send and reply to messages by integrating Slack into your workflow.
Preview of Send as a bot or from your own account and customize your message using variables.
Preview of Use any of these Slack actions in your Relay.app workflows.
Preview of Use Relay.app's integrations for Slack to trigger actions across your apps
Preview of Use any of these Trello actions in your Relay.app workflows.
Preview of Trigger actions across your apps based on changes in Trello

Example Slack + Trello workflows

Slack Triggers
Message
Slack logo
chat
Message sent to channel
Trello Actions
Board
Trello logo
search
Find list(s)
Card
Trello logo
playlist_add
Add card to list
Trello logo
add_comment
Add comment to card
Trello logo
search
Find card(s)
Trello logo
move_up
Move card
Trello logo
edit
Update card
Trello Triggers
Board
Trello logo
edit
List changed
Trello logo
target
List first meets conditions
Trello logo
add
New list added
Card
Trello logo
edit
Card changed
Trello logo
target
Card first meets conditions
Trello logo
add
New card added
Slack Actions
Channel
Slack logo
bookmark_add
Add bookmark to channel
Slack logo
smart_toy
Add bot to channel
Slack logo
person_add
Add users to channel
Slack logo
archive
Archive channel
Slack logo
add
Create channel
Slack logo
search
Find channel(s)
Slack logo
edit
Rename channel
Slack logo
unarchive
Unarchive channel
Slack logo
description
Update description
Slack logo
topic
Update topic
Invitation
Slack logo
schedule
Wait until external invitees accept invites
Message
Slack logo
link
Generate message link
Slack logo
add_reaction
React to message
Slack logo
reply
Reply to message
Slack logo
send
Send message
Reaction
Slack logo
schedule
Wait until message reaction
User
Slack logo
search
Find user(s)
User group
Slack logo
search
Find user group(s)

Create your own Slack + Trello integration

Select a trigger in Slack
Select an action in Trello
Create your workflow

Or automate Trello + Slack

Select a trigger in Trello
Select an action in Slack
Create your workflow

FAQ

  • What is Relay.app?

    Relay.app is a modern, easy-to-use automation tool. Build workflows that connect and automate actions across all the apps you already use. Relay.app has deep integrations, rich workflow tools, and human-in-the-loop steps for bringing human decisions, tasks, and approvals into automated workflows. Learn more about Relay.app's features.

  • How do I connect Slack to Trello with Relay.app?

    1. Create a free Relay.app account
    2. Set a trigger in Slack or Trello to kick off new workflow runs
    3. Add one or more actions to run in your workflow
    4. Authorize Slack and Trello to connect to Relay.app
    5. Turn on your workflow and start getting more done with less manual work

    Check above for some example workflows, or visit our help center for more details on how to get started.

  • Is Relay.app a Make.com alternative for connecting Slack to Trello?

    Yes. Make is a powerful automation platform with a visual scenario editor. But if you’re looking for a way to connect Slack to Trello that combines ease of use with the ability to integrate AI and human decision making seamlessly into your workflow, along with exceptional support, Relay.app is the go-to automation tool for your business.

    For more info check out our article comparing Relay.app to Make or our comparison of Make alternatives.

    Of course we're biased, but we believe Relay.app is the best way to connect and automate Slack and Trello—give it a try and let us know what you think.

See why people love Relay.app

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Salama💯
@SalamaErgossum
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Just ran my first automation workflow with @relay !

I wanted to send newsletters from Outlook to Notion, and it was so easy I almost cried—after struggling and giving up with other tools like Make.

Huge thanks to @relay for empowering non-tech folks like me!

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Marco Elizalde
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@marcoETmx
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I discovered @relay and it is incredible

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Peter Jauhal
via email

Relay is a fantastic app. I keep finding new uses for it everyday. I am not a programmer but I can make some really complicated work flows work pretty quickly.

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Lucas Grey
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@ImLucasGrey
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Falling in love with @relay. Tried make and zapier and this uiux worked the simplest. It gets the job done.

Automated our waitlist collection and replying process.
Used gpt in the workflow to parse the replies to our waitlist email qtns & saved them into our notion database.

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Rafa
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@rafanocode
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I truly appreciate how @relay presents testing info. You can easily see what you are testing, and the messages are very clear if there's an error.

They are definitely creating a fantastic tool!

Screenshot showing how to test a step in an automated workflow in Relay.app
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Duke Dao
@dummy_coder
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.@relay is just straight out awesome. Give it a try

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Benjamin Borowski👨‍🚒
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@typeoneerror
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Relay's "human in the loop" model is super effective for teams. Not only is this the best designed UI for automation building on the market, they've really thought about how not everything can be automated. Fantastic for building operationalized SOPs.

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Notion Coach
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@NotionCoach
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Finally getting a chance to explore @relay and wow, UX feels leaps ahead of Zapier/Make.

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Maayan
Co-Founder at Elementary

You saved me thousands of dollars in engineering work.

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Eva (Ziki) Zivanovic
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@ZikiDoesNotion
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If you’re never heard of @relay you’re missing out BIG TIME.

Relay.app is an automation app that has been getting a lot of traction lately.
And for good reason.

What makes them unique on the market is their Human-In-The-Loop functionality.

This functionality basically allows your company to add intermediate manual steps that can add unique judgment, context, and perspective.

Client onboarding workflow screenshot in Relay.app

New to Relay.app? Learn how to automate your first workflow

What will you automate?

Sign up and get started with your first Relay.app workflow today.
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