Murmur
Speak. Murmur writes it back clean.
Tap a key, talk, and your words land in any app — fillers dropped, your names spelled right, sentences capitalized, spelling fixed. Then Murmur tells you the one or two words to double-check, so you fix those instead of re-reading everything. Every other tool dumps the raw transcript. Murmur corrects it, on your machine. No cloud, no account — free and open source. Windows.
Tap once. Talk. Tap again.
Tap to start / stop
The default. Tap once and talk as long as you want, tap again to insert. A key that does nothing else on Windows.
Hands-freePush-to-talk
Prefer walkie-talkie? Set a hold key: hold it, talk, release to insert. Runs alongside the tap toggle.
HoldYour call
Or toggle with a double- or triple-tap, or a combo like Ctrl+Shift. Pick what your hands like in ⚙ Settings.
ConfigurableIt doesn't just transcribe. It cleans.
Rules
Capitalizes sentences, drops um / uh / you know, turns "new line" into a real break, tidies spacing.
Your dictionary
Fixes your names & jargon — get max → Getmax, shri ram → Sriram. Learns new ones from your edits.
Spell-check
Offline spelling correction that protects your proper nouns — it never "fixes" your names into something else.
Smart AI
Optional grammar & homophone pass (their/there) via a local Ollama model. Lights up when you pull one — still 100% offline.
It tells you which words to double-check.
Send the deck to Priyanka before their standup — I think she'll recieve it by noon.
Solid underline — the recognizer was unsure, or it's a word Murmur has never seen.
Dashed underline — a homophone (their / there): heard fine, just worth a one-second glance.
Click it, pick the fix, and Murmur learns it — next time you say that word, it's already right.
A dictionary that remembers your words.
Fix it once
Correct a note in Browse and Murmur diffs your edit, remembering wrong → right for next time.
Heard right up front
Your words are fed to the recognizer too, so the names and jargon you use every day come out right at the source — not just patched after.
Yours to edit
A plain custom_dictionary.json you own — add names, jargon, acronyms, protected words.
Never leaves
Your dictionary and learned edits live on your disk. No account, no sync, no server sees a word.
Every note, on a real calendar.
The whole thing runs on the laptop in front of you.
Built on open source — and what plugs in next.
Hearing
Live: faster-whisper (local Whisper, CPU) + high-pass / spectral noise reduction before transcribing.
Cleaning
Live: rule engine + learning dictionary + pyspellchecker. Next: deeper grammar models.
Smart pass
Auto-detected: Ollama local LLM for homophones / grammar. Haiku (cloud) opt-in only.
Plumbing
Live: pynput triggers, paste-anywhere, Obsidian daily notes, tray + autostart, .wav + manifest.
Straight answers before you ask.
Does my voice or text ever leave my computer?
No. By default Murmur transcribes and cleans your speech entirely on your own machine — no cloud, no account, no server sees a word. The only exception is an optional Claude Haiku polish tier that's off by default; everything else, including the optional local AI, runs fully offline.
How is it different from Wispr Flow?
Wispr Flow sends your audio to the cloud. Murmur runs 100% locally on Windows, and instead of only transcribing it cleans the text and tells you which words to double-check — so your voice never leaves your machine.
How is it different from Dragon?
Dragon is heavy, enterprise and $500+ a year. Murmur is free, installs in minutes, runs locally, and learns your names and jargon as you correct it.
Does it work offline?
Yes — on a plane, with no internet. Speech recognition (faster-whisper), the cleanup engine and spell-check all run on-device.
Which languages does it support?
English runs on a fast English-only model. Tamil, Hindi, Telugu, Malayalam, Kannada, Spanish and roughly 99 other languages are supported through Whisper's multilingual model.
Is it really free? What's the catch?
The local app is free. A future Pro tier (cloud sync, team dictionaries, profession vocabulary packs) will be paid — but the private, on-device core stays free.
Murmur is free & open source. Download & run it today.
The easy way — one click, no setup.
- Download the Windows build and unzip it anywhere.
- Double-click
Murmur.exe. (First launch downloads the local speech model once, ~150 MB.) - Press Right Ctrl, talk, press again — your cleaned text pastes in.
Not code-signed yet, so Windows may say "Windows protected your PC" — click More info → Run anyway. Murmur runs only on your machine and uploads nothing.
Prefer to run from source? (developers)
git clone the repo → double-click install.bat → run.bat. Needs Python 3.10+.
Built by GetMax — an AI-native company that ships software which does the work, not just describes it.
We don't just talk about automation — we run it. Agents that read, decide and act inside real healthcare operations, alongside public builds like Murmur and Sentinel. Same hands, same standard.