Anti-transcription tool to block AI meeting bots

What to build

A lightweight macOS menu-bar app and companion browser extension that detects when an AI transcription bot (Otter, Fireflies, Zoom/Teams built-in transcription, Granola) joins a call and lets the host block or mute its capture with a per-meeting toggle, aimed at lawyers, HR professionals, and executives who need control over what gets recorded.

AI meeting-transcription bots are becoming default-on across Zoom, Teams, and Meet, creating a growing pocket of anxiety among privacy-sensitive professionals who want a simple way to detect and block them before a call starts.

Demand

Lawyers, HR staff, and executives handling privileged or confidential conversations want to control who or what is recording them, and the urgency is rising now because AI note-taker bots are shifting from opt-in novelty to default meeting behavior in 2025-2026.

• Product HuntDemand

  Product Hunt listing: 'Off the Record. Block AI from transcribing your meetings' — a shipped product already addressing this exact use case, with public discussion and upvotes on the platform.

• Signal cluster: Off the RecordOpportunity

  Opportunity brief describing unmet demand among privacy-conscious professionals for a tool to detect and block AI meeting-transcription bots like Otter, Fireflies, Zoom/Teams transcription, and Granola.

Stack

• Electron or Swift (macOS menu-bar app)
• Chrome Extension (Manifest V3)
• Zoom/Teams/Meet participant-list DOM scraping
• Known-bot fingerprint list (Otter, Fireflies, Granola user-agents/join patterns)
• Stripe Checkout or Gumroad for one-time/subscription payments

Solo + AI difficulty

The hard part is reliably detecting third-party bots across Zoom/Teams/Meet without official platform APIs — this means scraping participant lists or DOM structures that change without notice and require ongoing maintenance. The menu-bar toggle UI and extension popup are easy to build quickly with AI coding help. A solo builder could ship an MVP covering Zoom plus 2-3 known bots in roughly 2-4 weeks, with broader platform coverage being continuous upkeep rather than a one-time build.

Entry threshold

Solo-buildable in one to two weeks since it mainly needs to detect known bot join patterns or audio-API hooks and block/mute them, with no licences required, though reliably covering every platform and transcription vendor update adds ongoing maintenance.

Window

6-12 months

Where to find first users

• Product Hunt launch
• r/privacy and r/legaltech
• Direct outreach to law firm IT/security and HR tech leads
• Indie Hackers and build-in-public posts on X/LinkedIn

Competitors

• Off the Record

Counter-signals & risks

• Zoom, Teams, and Google Meet control their own meeting infrastructure and could restrict or block third-party detection/blocking tools at the platform level, undermining the product's long-term viability.

• Blocking recording or transcription tools may conflict with e-discovery obligations, regulatory recordkeeping requirements, or two-party consent recording laws in some jurisdictions, which could limit the addressable market.

• The underlying signal has no historical match and a modest score (0.47), indicating this is a speculative opportunity without strong demonstrated market pull beyond the single Product Hunt listing.