Launching today
Nullify
Detect & block invisible AI meeting transcription tools
1 follower
Detect & block invisible AI meeting transcription tools
1 follower
Invisible AI transcription is the fastest-growing pivacy threat in remote work. Tools like Granola, Ottr.ai, and Fireflies silently capture your meetings wth no recording indicator and no consent. Nullify deects 8+ transcription tools in real-time across Zoom Meet, and Teams. Audio Shield uses psychoacoustic prturbation to make AI transcripts useless while you ound normal to humans. Free, open source (MIT), 100%local processing. macOS and Windows.
Hey Product Hunt! 👋
I built Nullify because I discovered that a colleague was using Granola to silently transcribe all our team meetings — without telling anyone. No recording indicator, no consent, nothing. Our 1-on-1s, salary discussions, and candid team conversations were all being captured and stored on third-party servers.
When I looked into it, I realized this is a massive and growing problem:
- Granola just raised $125M at a $1.5B valuation
- Otter.ai is facing a class-action lawsuit for recording without consent
- Stanford has banned AI meeting bots entirely
The worst part? Traditional platform indicators (like Zoom's recording dot) don't detect any of these tools. They operate at the system audio level, completely invisible.
So I built Nullify. It monitors for process-level and network-level signatures of these tools and alerts you instantly. And if you can't stop the recording, Audio Shield uses psychoacoustic techniques to make the AI transcript unusable — while your voice sounds perfectly normal to everyone on the call.
It's completely free, open source (MIT), and 100% local — no data ever leaves your machine.
I'd love your feedback. What features would you want to see next?
GitHub: https://github.com/khaoss85/nullify
Site: https://nullify.guru/