↔

Connect Slack to Trello

Technical Integration Guide & Cost Analysis

Integration Status

Slack (Communication) has a native integration with Trello (Project Management). Sync Slack messages to Trello cards for streamlined project management and automated task assignments. Typical setup takes around 30 minutes.

Data Flow Architecture

Slack

→ One-Way

Standard API Latency

Trello

API Tier

REST API v3

Auth Method

OAuth 2.0

Rate Limits

Standard SaaS Limits

Integration Overview

Connect Slack to Trello and automate task assignments, eliminating manual entry and enhancing team collaboration with real-time updates.

Primary Use Case

Sync Slack messages to Trello cards for streamlined project management and automated task assignments.

Setup Complexity

medium

Typical Setup Time

30 minutes

Automate Slack + Trello with n8n

Free, open-source workflows you can import into n8n in one click — no subscription required.

Try n8n free → Browse all n8n templates

Ready to automate? We have a template for you.

Copy this Slack → Trello blueprint, open Make.com, paste it into the canvas, and your workflow is ready to configure.

slack-trello-blueprint.json

{
  "name": "Slack → Trello Sync",
  "flow": [
    {
      "id": 1,
      "module": "slack:WatchMessages",
      "version": 1,
      "parameters": {},
      "mapper": {},
      "metadata": {
        "designer": {
          "x": 0,
          "y": 0
        },
        "restore": {},
        "expect": [
          {
            "name": "body",
            "type": "text",
            "label": "Body"
          }
        ]
      }
    },
    {
      "id": 2,
      "module": "http:ActionSendData",
      "version": 1,
      "parameters": {
        "url": "https://api.trello.com/v1/records"
      },
      "mapper": {},
      "metadata": {
        "designer": {
          "x": 300,
          "y": 0
        }
      }
    }
  ],
  "metadata": {
    "instant": false,
    "version": 1,
    "scenario": {
      "roundtrips": 1,
      "maxErrors": 3,
      "autoCommit": true,
      "sequential": false
    }
  }
}

Download .json

Open Make.com ->

Frequently Asked Questions

How do I connect Slack to Trello? ▼

There's no native integration. To connect them, you will need a middleware tool like Make or n8n.

Is the connection between Slack and Trello secure? ▼

Yes. This integration typically uses OAuth 2.0, meaning you grant permission via a secure login window. You do not need to share your raw password, and you can revoke access at any time from your Slack security settings.

Is the sync one-way or two-way? ▼

This is typically a one-way sync: Slack → Trello. Changes in Trello do not sync back to Slack.

Will existing data in Slack sync to Trello? ▼

Usually, no. Most native integrations are "forward-looking," meaning they only sync data created or updated *after* you activate the connection. To move historical data, you will likely need to perform a one-time CSV export/import manually.

Can I sync custom fields? ▼

Native integration is limited to standard fields. For custom field mapping, use an automation tool.

Can I add approval steps before syncing? ▼

Native integrations can't do this. For workflows that need human review (e.g., "Manager must approve before creating invoice"), use Relay.app.

🗂️

Using Slack and Trello with other tools?

Build your full stack map — see all connections and gaps at once.

See your full stack →