Simbi
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Notetaking that listens.

Live, speaker-labelled meeting transcripts, saved as plain files.
Simbi lives symbiotically with the ChatGPT plan you already have.

Read the docs
The Simbi app: a note with AI summary, timestamped citations, and a live speaker-labelled transcript beside the recording

Your ChatGPT subscription does the heavy lifting.

Even a free ChatGPT account includes dictation-grade speech-to-text and a generous amount of model usage. Simbi combines them with a small speaker model that runs entirely on your Mac.

Local diarization

A compact speaker-separation model runs on the Apple Neural Engine and works out who is talking in about a second, without sending audio anywhere.

ChatGPT speech-to-text

Speech is cut into clean per-speaker segments and transcribed by the same backend that powers dictation in the ChatGPT app. Far more accurate than local models, and easy on your battery.

Codex intelligence

Transcript fixing, file conversion, summaries, and chat are Codex threads in the ChatGPT desktop app. Your plan, your models, your context.

Every note is just a folder.

No database, no proprietary format, zero walls. If you can see it in Finder, it is yours.

~/Simbi/Work/2026-07-15 Standup/~/Simbi/Work/Standup/

├─ note.md          your notes, plain Markdown
├─ audio.webm       the recording, Opus
├─ transcript.vtt   transcript with speaker labels
├─ files/           anything you drop in
└─ context/         Markdown mirrors, written by Codex
  • Open your Simbi home folder in Obsidian and your notes read perfectly: they are ordinary Markdown.
  • Drop audio.webm and transcript.vtt into VLC and the recording plays with speaker-labelled subtitles in sync.
  • Sync it with git or iCloud, grep it, back it up: anything that works on files works on Simbi.

Small app, sharp tools.

Live transcript fixer

A Codex thread watches the transcript as it grows, fixes mis-hearings using your files as context, and names speakers when the conversation reveals who they are.

AI notes with citations

After each recording Simbi writes a summary whose citations are timestamps. Click one and playback jumps to that moment in the audio.

File import

Drop a PDF or a slide deck onto a note. Codex converts it to clean Markdown that becomes context for transcript fixes and chat.

Chat with your notes

One click opens a Codex chat with your note, transcript, and files already in context.

System audio capture

Record your mic and the other side of the call together: system audio is captured and mixed into one timeline.

Crash-safe recording

Audio streams straight to disk in a crash-tolerant format. If your Mac dies mid-meeting, the recording survives.

Zero walls around your notes.

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