Creating a Content Approval Workflow with Asana, Trello, and Slack

Creating a Content Approval Workflow with Asana, Trello, and Slack

Content bottlenecks kill momentum. You've got a blog post sitting in someone's inbox for three days, a social graphic waiting for feedback that never comes, and a newsletter draft lost in an email thread somewhere between "looks good" and "can we tweak the headline?"

The fix isn't hiring more people or working longer hours—it's building a content approval workflow that actually works. One where tasks have clear owners, deadlines are visible, and approval requests surface where your team already spends their time.

This guide walks you through combining Asana, Trello, and Slack into a streamlined content review process—whether you need all three tools or just the right pairing for your team size and complexity.

Why These Three Tools Work Together

Each tool serves a distinct purpose in your collaborative content review process:

• Asana excels at structured task management with native approvals, dependencies, and reporting
• Trello offers visual simplicity—perfect for drag-and-drop Kanban workflows
• Slack acts as your notification hub, putting approval requests where conversations already happen

The magic happens when you connect them. Instead of checking three separate tools, approvers get pinged in Slack when something needs their attention. Instead of emailing "hey, did you see my draft?", you glance at a board and know exactly where every piece stands.

Choose Your Path: Which Setup Fits Your Team?

Before diving into implementation, identify which scenario matches your situation:

Path A: Small Team, Simple Needs (Under 5 People)

You're a founder with a freelance writer and maybe a VA. You don't need enterprise features—you need something that takes 30 minutes to set up and just works.

Recommended stack: Trello + Slack

Trello's free tier handles unlimited personal boards, and Slack's free plan gives you enough integration capability to surface card movements. You'll use manual checklists for approval tracking, but with a small team, that's perfectly adequate.

Path B: Growing Team, Recurring Processes (5-20 People)

You've got dedicated content creators, editors, and stakeholders who need to sign off. Content moves through predictable stages, and you need audit trails for who approved what and when.

Recommended stack: Asana + Slack

Asana's native approval task type combined with automation rules handles formal approval chains. Slack integration means reviewers get "Approve/Reject" buttons right in their message stream. You'll pay more per user, but the time savings compound quickly.

Path C: Hybrid Needs (Visual Tracking + Formal Approvals)

Some team members love Kanban boards; others need structured task lists. Maybe you manage multiple clients who each prefer different visibility.

Recommended stack: All three tools connected

Use Trello for visual status tracking (great for sharing with clients), Asana for internal task management and approvals, and Slack as the unified notification layer. This adds complexity but offers maximum flexibility.

Setting Up Trello for Content Approvals

Start with the simplest approach. Trello's visual boards make it immediately clear where every piece of content sits in your pipeline.

Board Structure

Create lists that mirror your content stages:

• Backlog/Ideas — content concepts waiting to be assigned
• In Progress — actively being created
• Ready for Review — draft complete, awaiting feedback
• Revisions Needed — feedback received, changes in progress
• Approved — signed off and ready for publishing
• Published — live content (optional archive)

Automating Card Movement with Butler

Trello's Butler automation eliminates manual busywork. Set up rules like:

• When a card is moved to "Ready for Review," automatically add a due date (2 days from now) and assign your editor
• When a checklist item named "Editor Approved" is checked, move the card to "Approved"
• When a card enters "Approved," post a comment tagging your publishing coordinator

Note that Butler has command quotas on free plans—you'll get approximately 1,000 command runs per month. For most small teams, that's plenty.

Connecting Trello to Slack

Install the Trello app in your Slack workspace, then subscribe your #content-review channel to board events. Configure notifications for "card moved to list" events—specifically targeting your "Ready for Review" list.

Now whenever someone drags a card into review, your Slack channel lights up. Reviewers can click through to the card, leave comments, and move it forward—all without opening their email.

Building a Formal Approval System in Asana

When you need more than visual tracking—when you need documented approval chains, audit trails, and automated task routing—Asana delivers.

Using the Native Approvals Task Type

Asana Premium and higher tiers include a dedicated "Approvals" task type. Instead of just marking tasks complete, approvers see explicit "Approve" or "Request Changes" buttons. This removes ambiguity—no more wondering if "done" means "I looked at it" or "I officially sign off."

To automate content approvals in Asana:

1. Create an Approval task (or convert an existing task to Approval type)
2. Assign it to your approver with a due date
3. Set up a Rule: "When task is approved, move to Section X and assign to Y"
4. Add another Rule: "When changes are requested, move to Revisions and notify the creator"

This creates a closed loop where tasks automatically route to the right person at each stage.

Using Forms for Content Requests

Stop accepting content requests via email or random Slack DMs. Asana Forms let you create a standardized intake process:

• Content type (blog, social, email, etc.)
• Target publish date
• Brief or key messaging
• Links to reference materials

Form submissions automatically create tasks in your content project, pre-assigned based on content type. A blog post goes to your writer; a social graphic goes to your designer. No manual task creation, no lost requests.

Integrating Asana with Slack

The Asana app for Slack enables powerful two-way communication:

• Get notifications in Slack when you're assigned an approval task
• Complete approvals directly from Slack using action buttons
• Create Asana tasks from Slack messages (turn a conversation into a tracked action item)
• Subscribe channels to project updates

For approval workflows specifically, use Slack's Workflow Builder to create custom forms. When someone submits a content approval request through the workflow, it can create an Asana task and notify the relevant approver—all without leaving Slack.

Advanced: Combining All Three Tools

For teams with complex needs—multiple content streams, client-facing boards, and internal approval processes—here's how to connect everything:

Layer 1: Trello for Visual Status

Client-facing or team-wide visibility lives in Trello. Anyone can glance at the board and understand where content stands. Cards contain links to source documents, design files, and published URLs.

Layer 2: Asana for Task Management

Asana handles the detailed work: subtasks, dependencies, time tracking, and formal approvals. Writers and editors work here daily. When a task reaches "approval" stage in Asana, an automation (via native rules or Zapier) moves the corresponding Trello card to "Ready for Review."

Layer 3: Slack for Communication

Slack ties everything together. Both Asana and Trello feed notifications into relevant channels. Quick feedback happens in threads. Formal approvals happen via Workflow Builder forms or Asana's in-Slack buttons.

This hybrid approach adds setup complexity but eliminates the "which tool do I check?" problem. Everything surfaces in Slack; detailed work lives in the appropriate management tool.

Frequently Asked Questions

How do I automate content approvals in Asana?

Use Asana's built-in "Approvals" task type (available on Premium plans and above) combined with custom automation rules. When you assign an approval task, the assignee sees explicit Approve/Reject buttons. Create rules to automatically advance task status based on the approval decision and notify downstream team members.

Can Trello handle a formal approval step?

Yes, though it requires a workaround. Enable Butler automation to move cards between "Review" and "Approved" lists based on checklist completion. Alternatively, install a third-party Approval Power-Up for more structured sign-off functionality. Trello Business Class ($12.50/user/month) unlocks unlimited Power-Ups and elevated automation.

How do I surface Trello updates in Slack automatically?

Install the Trello app in Slack, then use the /trello link command to subscribe a channel to a specific board. Configure notification preferences to alert the channel when cards move to specific lists. For more granular control, combine with Butler rules that post comments mentioning @channel when cards enter review.

Should I use Slack or email for approvals?

Slack reduces inbox clutter and enables faster turnaround—use it for real-time notifications and threaded feedback. Reserve email for formal sign-off only when you need an external paper trail (legal, compliance, or external stakeholders who aren't in your Slack workspace). For internal content approvals, Slack's immediacy typically wins.

Trello vs Asana for content approvals—which is better?

It depends on your needs. Trello offers visual simplicity and lower cost, ideal for small teams with straightforward workflows. Asana provides native approval features, robust reporting, and better audit trails—worth the higher per-user cost for teams needing formal approval chains or regulatory compliance. Many growing teams start with Trello and migrate to Asana as processes mature.

Quick Reference: Feature Comparison

When evaluating these task approval tools, consider:

• Native Approvals: Asana (yes, built-in) • Trello (no, requires Power-Up) • Slack (yes, via Workflow Builder)
• Automation Depth: Asana (advanced rules) • Trello (basic Butler) • Slack (moderate workflows)
• Reporting: Asana (robust dashboards) • Trello (minimal) • Slack (N/A)
• Setup Effort: Asana (medium) • Trello (low) • Slack (very low)
• Cost for Small Teams: Asana (higher) • Trello (lower) • Slack (lowest)

Making It Stick

The best content approval workflow is the one your team actually uses. Start simpler than you think you need—you can always add complexity later. A basic Trello board with Slack notifications beats an elaborate Asana setup that nobody updates.

Document your workflow in a shared space (Notion, a pinned Slack post, or a task in your project management tool itself). Include which lists/stages content moves through, who's responsible for each transition, and expected turnaround times.

Then watch for friction points. If cards pile up in "Ready for Review," your notification setup might need tuning. If approvers consistently miss deadlines, consider tightening integrations or adjusting expectations. The goal isn't perfection on day one—it's building a system that improves over time.