Live event captioning

Choose offline certainty or cloud-powered accuracy.

Two powerful captioning tools built for live events. Go fully local for ultimate privacy, or leverage cloud-based technology.

Desktop, offline

Air-Gap-Cap

  • Fully offline captioning for air-gapped workflows
  • Desktop install with PIP and extended screen options
  • Best when privacy and isolation outweigh remote access
  • Minimum: Apple Silicon (M1+), 8GB RAM, macOS 13+, audio input, 2GB storage.
  • Recommended: Apple Silicon, 16GB RAM (for default engine & multi-display shows).
Purchase download

Online, cloud STT

StackCap

  • Accurate browser-based live captions
  • Fast, accurate intelligent transcription and captions paid by the hour
  • Simply send the caption links to the technician using our friendly dashboard
  • Single-line, double-line, or full-screen caption output
  • Requires stable internet connectivity — minimum 10 Mbps down / 2–3 Mbps up per room, wired if possible.
Enter StackCap