How to run an anonymous brainstorming session (step by step)

Why brainstorm anonymously?

Classic out-loud brainstorming has two built-in problems. First, only one person can talk at a time, so ideas queue up and get forgotten. Psychologists Michael Diehl and Wolfgang Stroebe called this production blocking in their 1987 study of a long-standing puzzle — why the same number of people working separately come up with more ideas than a group brainstorming out loud — and found it explained most of the gap. Second, people judge ideas by who said them: the manager’s idea gets nods, the new hire’s gets silence.

Anonymous brainstorming fixes both. Everyone writes at the same time, and ideas arrive without a name, so the group has to judge them on their merit. It’s especially useful when there’s a hierarchy in the room, when the topic is sensitive (“what’s slowing us down?”), or when a few voices usually dominate.

How do you run an anonymous brainstorming session?

1. Frame one specific prompt. “How might we cut onboarding time in half?” beats “Ideas for onboarding?” One prompt per round.
2. Collect ideas silently and anonymously (3–5 min). Everyone submits as many ideas as they like, with no names and no discussion yet. Sticky notes into a box work; so does an open-text question answered from phones.
3. Show everything at once. Put all the ideas on screen together — a word cloud is a quick way to see which themes came up most — and group duplicates.
4. Vote anonymously. Turn the top five to eight ideas into a multiple-choice question and let everyone pick the ones they’d back. Reveal the results after the vote closes, so early votes don’t steer the rest.
5. Discuss the winners out loud. Now the open conversation is useful: refine the top two or three, assign owners, and decide what to try first.

20 anonymous brainstorming prompts

Copy-paste prompts, grouped by what the session is for.

Improving how the team works

1. What’s one thing that slows you down every week?
2. Which meeting would you cancel, and what would replace it?
3. What’s a rule or process we follow that no longer makes sense?
4. What would make handoffs between teams smoother?
5. If you had one extra day a month, what would you fix?

Product and customers

6. What’s the most common complaint you hear from customers?
7. What feature would you remove if you could?
8. How might we get a new user to value in their first five minutes?
9. What would make a customer recommend us to a friend?
10. Which problem are we ignoring because it’s hard?

Workshops and training

11. What’s the biggest obstacle to applying today’s topic in your work?
12. What questions do you still have that you didn’t want to ask out loud?
13. Which real situation should we use as our case study?
14. What would make this workshop more useful for your role?
15. What should the next session focus on?

Strategy and culture

16. What’s one risk leadership might be underestimating?
17. Where are we spending effort that doesn’t pay off?
18. What should we stop doing next quarter?
19. What would make this a better place to work?
20. What’s an idea you’ve had for a while but never raised?

Common mistakes to avoid

• Discussing too early. The moment someone reacts to an idea, everyone else starts editing theirs.
• Showing ideas one by one as they arrive. People anchor on the first few. Reveal them together.
• Promising anonymity you can’t keep. In a group of four, handwriting or phrasing gives people away. Be honest about it — here’s what “anonymous” actually means.
• No follow-through. If the winning idea disappears, the next brainstorm gets fewer, safer ideas.

Running this inside a workshop? Pair it with workshop feedback and evaluation questions at the end, or see how anonymous polling for workshops works.