Otter.ai was sued for secretly recording conversations and using them to train AI. Mumbl runs 100% on your device. Your recordings never leave your computer.
macOS & Windows — Your voice stays yours
"They retain your data in a cloud service and use your recordings as future training data."
Otter's class-action lawsuit revealed it auto-joins meetings without participant consent.
A VC firm had hours of confidential information exposed through Otter recap emails.
Mumbl doesn't have servers to send your audio to, even if we wanted to. Everything is local.
| Feature | Mumbl | Otter.ai |
|---|---|---|
| Audio processing | 100% on your device | Uploaded to cloud servers |
| Data retention | Nothing stored — you control it | Retained on their servers |
| AI training on your data | Never | Used for model training |
| Auto-join meetings | No — you control when it records | Yes — without participant consent |
| Works offline | Yes | No — cloud required |
| Free tier | 10/week, no credit card | Severely limited |
Hold down Option + Space
Or customize your own hotkey
Talk naturally
Say what you're thinking, ramble, use filler words. Mumbl cleans it all up.
Release
AI formats it instantly in your chosen style and pastes it wherever your cursor is.
Mumbl processes everything locally using Whisper AI. No cloud uploads. No servers. No data collection. Your words stay yours.
This is the simplest way to 10X your productivity.
I can finally talk to Claude Code with only two keys.
My favorite thing about Mumbl is its simplicity. There aren't any loops you have to go through to make it work and it's intertwined with my device really well. Right now I mainly use Mumbl for school work!
We dropped Otter the week the lawsuit hit. Mumbl gave our team the same voice-to-text speed boost without any cloud dependency. No bots joining calls, no recap emails leaking info, no audio on anyone else's servers.
I was an Otter Pro subscriber for two years. Switched to Mumbl and realized I was paying for features I never used. All I needed was to talk and get clean text. Mumbl does that better, cheaper, and without the privacy risk.
Our compliance team spent three months reviewing Otter's data practices and couldn't get comfortable. They approved Mumbl in one meeting because there's no third-party data handling to review. Everything stays on the device.
This is the simplest way to 10X your productivity.
I can finally talk to Claude Code with only two keys.
My favorite thing about Mumbl is its simplicity. There aren't any loops you have to go through to make it work and it's intertwined with my device really well. Right now I mainly use Mumbl for school work!
We dropped Otter the week the lawsuit hit. Mumbl gave our team the same voice-to-text speed boost without any cloud dependency. No bots joining calls, no recap emails leaking info, no audio on anyone else's servers.
I was an Otter Pro subscriber for two years. Switched to Mumbl and realized I was paying for features I never used. All I needed was to talk and get clean text. Mumbl does that better, cheaper, and without the privacy risk.
Our compliance team spent three months reviewing Otter's data practices and couldn't get comfortable. They approved Mumbl in one meeting because there's no third-party data handling to review. Everything stays on the device.
This is the simplest way to 10X your productivity.
I can finally talk to Claude Code with only two keys.
My favorite thing about Mumbl is its simplicity. There aren't any loops you have to go through to make it work and it's intertwined with my device really well. Right now I mainly use Mumbl for school work!
We dropped Otter the week the lawsuit hit. Mumbl gave our team the same voice-to-text speed boost without any cloud dependency. No bots joining calls, no recap emails leaking info, no audio on anyone else's servers.
I was an Otter Pro subscriber for two years. Switched to Mumbl and realized I was paying for features I never used. All I needed was to talk and get clean text. Mumbl does that better, cheaper, and without the privacy risk.
Our compliance team spent three months reviewing Otter's data practices and couldn't get comfortable. They approved Mumbl in one meeting because there's no third-party data handling to review. Everything stays on the device.
Start free with 10 transcriptions per week. Upgrade anytime for unlimited.
10 transcriptions per week. Perfect to get started.
Unlimited transcriptions. Best value.
Pay once, use forever. All future updates included.
In August 2025, Otter was hit with a class-action lawsuit for "deceptively and surreptitiously" recording private conversations to train AI without consent. The lawsuit revealed auto-joining meetings without participant consent and retaining recordings for AI training.
Mumbl is designed for voice-to-text — hit a hotkey, speak, get formatted text. It doesn't auto-join or record meetings. Your audio stays on your device and is processed instantly.
Yes. 10 transcriptions per week, forever, no credit card required. Otter gutted their free tier — Mumbl's stays generous because local processing doesn't cost us server fees.
Download Mumbl for free. Your voice stays on your device.
Switch to MumblmacOS & Windows — Free forever — No credit card