The 2am brain-dumper
Your best ideas happen out loud, then disappear.
Hit record, ramble, and go to bed with a map.
For founders & people who think out loud
Talk for ten minutes. Get your thinking back as a map.
Hit record and ramble. Mumble turns everything in your head into post-its, themes and decisions as you talk, right on your Mac.
macOS 13 or later · works with your Claude Code or Codex account
Team
Themes you never named.
Hire a designer?
Priya’s 1:1 overdue
Who owns support?
Fundraise
Investor update overdue
Raise now or in 6 months?
Warm intro list
Customers
Churned customer, why?
Pricing page
Onboarding emails
Sleep lol
Sound familiar?
The going-in-circles decider
You’ve had the same argument with your cofounder three Mondays running.
Options, reasons and the decision, saved.
The blank-page avoider
You opened a blank doc to “get it all down” and closed it again.
Nothing to set up. Talking is the input.
Three ways to think out loud.
Everything in your head, sorted into themes while you talk. You never have to name them.
See the brainstorm shape →
Product
Ship the export fix
Talk to 5 churned users
Pricing page copy
Hiring
Designer: contract first?
Write the JD this week
Me
Block Fridays for deep work
Book the dentist lol
Options across the top, reasons underneath, and the decision only when you make it.
See the decision shape →QuestionRaise now or in six months?
Option ARaise now
Runway for two more hires
Weak numbers, weak terms
Option BRaise in six months
Pilot results to show
Four months of thin cash
OutcomeRaise in Q1, after the pilot results
What worked, what didn’t, and what you’re doing next week, said out loud on a Friday afternoon.
See the retro shape →
What worked
Closed two pilots
Shipped onboarding v2
What didn’t
Skipped the investor update
Tuesday was all meetings
Next week
Investor update on Monday
Priya’s 1:1, no moving it
Change your mind out loud. It keeps up.
Before
Team
Hire a designer?
Priya’s 1:1 overdue
FundraiseInvestor update overdue
You, mid-sentence“Actually, the designer thing is a fundraise question.”
After
Team
Hire a designer?
Priya’s 1:1 overdue
FundraiseInvestor update overdue
Hire a designer?
Fundraise
Raise now or in 6 months?
Investor update overdue
Pilot results first
QuestionRaise now or in six months?
Option ARaise now
Option BRaise in six months
Messy to think in. Clean to share.
Hit record and talk. There’s nothing to fill in or set up first; the map starts drawing as you speak.
Mumble draws the map with your own Claude Code or Codex, on the plan you already pay for. It never asks for an API key.
Whisper transcribes on your Mac. Your 2am ramble is never uploaded.
Every brain dump is a folder of plain files in ~/Mumble. No account, no lock-in.
FAQ
Questions founders ask.
How is this different from dictation?
Dictation gives you a wall of text in the order you said it. Mumble sorts what you say into post-its, themes and decisions while you talk, so you get the shape of your thinking back, not a transcript to reread.
How is it different from asking ChatGPT for a mind map?
You don’t stop to type a prompt. Mumble builds the map while you talk, keeps it editable, and links every box to what you said.
Do I have to pick a template first?
You pick a shape when you start: Brainstorm for a brain dump, Decision for a big call. Then just talk, and you can switch the drawing style any time without redoing anything.
Can I change my mind halfway through?
Yes. Say “actually…” or “scratch that” and Mumble moves or rewrites the post-it in place, so the map shows what you ended up thinking.
Can I use it for cofounder chats and 1:1s?
Yes. Mumble listens to your microphone and your Mac’s audio, so it works in the room or on a Zoom, Meet or Teams call. Nothing joins the call; tell people you’re recording.
Can I use it on my phone?
Not yet. Mumble is a native Mac app for now. Join the waitlist to hear when that changes.
Is it private?
Your audio never leaves your Mac; transcription runs locally. To draw the map, the transcript goes through your own Claude Code or Codex account. The Private plan, coming soon, keeps even that on your computer.
Where do my brain dumps go?
Into plain files in ~/Mumble on your Mac, yours to keep. Export the map as PNG or PDF, and the summary and transcript as Markdown.
Can I edit the map afterwards?
Yes. Drag post-its between themes, rename them, add your own, and switch between Sketch and Business styles. Your edits always win over later AI updates.
What do I need?
A Mac on macOS 13 or later, and Claude Code or Codex installed and signed in. Mumble uses the plan you already pay for and never asks for an API key.
What does it cost?
Nothing while Mumble is in beta, and local use on your Mac stays free after it.