Why Use a Suggestion Box in Slack?
Whether you're a fast-growing startup or a mature org, having an always-open suggestion box can surface some of your team's best ideas. Instead of chasing feedback in meetings or forms, let people drop ideas when they have them — in the tool they're already using all day.
A Slack suggestion box helps you:
- Spot issues early (before they become problems)
- Collect anonymous employee feedback and questions
- Encourage transparency and psychological safety
- Improve team culture and communication
🔒 Should Suggestion Boxes Be Anonymous?
Short answer: Yes, ideally.
When people know they won't be judged, you'll get more honest feedback — especially around sensitive topics like leadership, workload, or team dynamics. The same anonymity that powers a suggestion box also lets people ask anonymous questions in Slack when they need an answer, not just a suggestion box.
How to Create a Suggestion Box in Slack Using OpenCulture
There's no native Slack feature for suggestion boxes — but you can set up a true suggestion box where people give feedback anonymously in just a couple of minutes using OpenCulture.
Step 1: Install OpenCulture in your Slack workspace
Click the button below to add OpenCulture to your Slack workspace:
Or head over to OpenCulture in the official Slack App Marketplace and click the "Add to Slack" button. If you don't have admin permissions, ask your Slack admin to install it for your workspace.
Step 2: Set up the suggestion box in a Slack channel of your choice
To get started, run /openculture suggestionbox in the channel you want to collect suggestions in. You can also launch it from the OpenCulture Home tab.
This opens the Setup Suggestion Box window, where you can configure the channel:
- Give it a title (e.g. "Team Suggestions"), and optionally keep AI-powered auto-moderation enabled
- Add moderators (who approve or reject suggestions) and responders (who get tagged on approved suggestions) — both are optional
- Click Enable to turn the channel into a suggestion box
💡 Bonus: Weekly reminder messages can nudge your team to keep sharing.
Step 3: Let your team submit suggestions
Once the channel is live, anyone can submit ideas or feedback anonymously by running /openculture suggest. They'll get a Submit Suggestion window where their identity stays completely anonymous — even to moderators.
Step 4: Review and approve suggestions
If you enabled moderation, each submission first lands with your moderators as an Awaiting Your Review card. They can Approve, Reject, or Respond Privately — all without ever seeing who submitted it.
You can even configure it to tag specific team leads or keep certain suggestions private.
Step 5: The suggestion is posted to the channel
Once approved, the suggestion is posted anonymously in the channel for the whole team to see, with any responders tagged for follow-up. From here it stops being a one-way submission and becomes a conversation.
Now the rest of the team can engage with it just like any other Slack message:
- React with emoji to show support — a wave of 👍 or 🔥 signals which ideas have momentum
- Reply in-thread to discuss, build on the idea, or volunteer to help make it happen
- Reply anonymously too. With Enable Anonymous Replies turned on, anyone can chime in on the thread without revealing who they are — so the discussion stays as candid as the original suggestion.
- Responders and team leads can chime in with context, decisions, or next steps — all in one transparent thread
- Anyone can keep the loop going with the Submit Another Suggestion button
This turns the suggestion box from a passive inbox into a living feedback channel where good ideas surface, gather support, and get acted on — out in the open.
DIY Alternatives
If you'd rather not install an app, here are a couple of do-it-yourself ways to approximate a suggestion box in Slack — each with its own trade-offs.
Slack Workflow Builder (Internal Automation)
Slack's Workflow Builder provides an efficient, no-code solution to handle internal feedback and moderation:
- Trigger: Set up a custom shortcut named "Submit Suggestion."
- Structured Input Form:
- Clearly defined fields for submitting ideas, categories (e.g., Process Improvement, Tools, Culture), and urgency or priority rating (1-5).
- Private Moderation Channel:
- Submissions initially land in a private channel, accessible only by designated moderators.
- Moderator Review via Emoji Reactions:
- Moderators review submissions and apply simple reactions (✅ for approval, ❌ for rejection).
- Automated Posting:
- Approved submissions (marked with ✅) are automatically posted to a public #suggestions-box channel. Rejected items (marked with ❌) trigger notifications or remain archived.
Cons of this approach:
- Available only on paid Slack plans.
- No clear audit trail for moderation actions.
- No mechanism to manage frequently recurring suggestions effectively.
- Harder to scale for multiple suggestion boxes at the team or departmental level.
3rd Party Forms (Google Forms + Zapier)
If you're not ready to install a bot, a third-party form like Google Forms or Typeform offers a barebones—but functional—alternative. (Already using a dedicated form tool? Here's how OpenCulture compares as a Suggestion Ox alternative.) The form route works like this:
- Create a Slack channel like
#team-suggestionsand pin a Google Form or Typeform to the top. - Ensure the form allows anonymous responses, but ideally restrict submissions to your organization's Google Workspace to avoid external spam.
- Use automation tools like Zapier or Make to forward new form responses directly into the Slack channel for visibility and discussion.
While moderation is trickier with this setup, one workaround is to route form submissions to a Google Sheet instead of Slack. From there, leadership can manually review and curate posts. However, this delays team visibility and may reduce open discussion—one of the key benefits of using Slack in the first place.
Cons of this approach:
- No native support for moderation, tagging, or categorization.
- Harder to catch repeat suggestions or filter inappropriate content.
- Tough to scale beyond one or two channels.
ROI: Why a Slack Suggestion Box is Worth It
Anonymous feedback might seem intangible at first glance—but when you translate it into actual dollars saved, the value becomes undeniable.
A well-managed Slack suggestion box can surface ideas that dramatically streamline processes, eliminate unnecessary meetings, and prevent costly problems before they escalate. Even one effective suggestion each quarter can result in significant time and financial savings across your organization.
Quick ROI Calculator
Consider this quick calculation:
If just one implemented idea saves each employee 1 hour per month:
- Number of Employees: 100
- Hourly Employee Cost: $50/hour (average fully-loaded cost)
Monthly Savings: 100 employees × $50/hr × 1 hr = $5,000/month
Annual Savings: $5,000 × 12 months = $60,000/year
This is conservative—many suggestions can yield far greater efficiency gains.
Additional Savings from Retention
Beyond direct productivity gains, a robust feedback mechanism also significantly reduces turnover. According to industry benchmarks, replacing a skilled employee typically costs 6-9 months of their salary in recruitment, onboarding, and lost productivity.
If your average salary is around $80,000/year, retaining even one employee who might otherwise leave due to unresolved frustrations can save between $40,000 to $60,000.
Want to calculate the exact ROI for your team? Try our free Employee Retention ROI Calculator to see how much you could save by reducing turnover.
Suggestion Box Best Practices
A digital suggestion box only delivers ROI when the rules are clear and the loop is tight. Treat it as an always-open employee idea box—one that anyone can drop into, and leadership regularly empties.
Follow these best practices to keep feedback honest, useful, and actionable:
- Pin the purpose. Add a one-line mission at the top of the channel. A visible charter prevents off-topic chatter.
Example: "This channel is our employee idea box for process fixes, culture tweaks, and product wins."
- Make anonymity explicit. Psychological safety drives openness.
Example: "All ideas are anonymous by default; names are shared only if you opt-in."
- Set a 24-hour moderation SLA. Assign two Idea moderators who react ✅ / ❌ within one day. Silence kills momentum faster than spam.
- Respond publicly. Even a quick "Thanks, noted!" tells the team someone is listening. Thread all follow-ups so the decision trail is transparent.
- Close the loop. When an idea ships, reply in-thread with stats ("Saved 18 engineer-hours/month").
- Purge or escalate quarterly. Suggestions older than 90 days either move to a project board or get archived—no zombie ideas.
- Summarize wins monthly. Post a recap in
#general: "April ideas saved 72 hours and cut SaaS spend by $10K."
Bottom line: A well-run digital suggestion box is more than a comment dump - it's a governed, measurable pipeline for continuous improvement. Follow these suggestion box best practices and you'll turn casual feedback into repeatable business wins.
