Michael Wilhelmsen has released Humla, an open-source macOS app that records, transcribes, and summarizes meetings entirely on-device, on GitHub . Offered under the MIT license, it features a local-first design inspired by the cloud note tool Granola.
macOS · Local AI Meeting Notes
Humla: meeting notes that never leave your Mac
A native macOS app that records, transcribes, diarizes and summarizes meetings entirely on-device — sending audio to no external server unless you explicitly choose one. A local-first design marketed as "full data control."
0
servers reached by default — processing stays on the Mac
2
parallel audio streams: mic + system, no bot in the call
~30MB
on-device diarization model (who spoke when)
Free
the app itself — team sync optional (self-host or paid)
From a live meeting to a summary — on-device
Record
Mic + system audio captured, free-form notes taken live
→
Transcribe + diarize
Local Whisper on Apple Silicon GPU; speakers identified on-device
→
Summarize
Meeting / 1:1 / Lecture presets via local LLM (Ollama, LM Studio)
Notes & transcripts stored in SQLite · recordings kept locally as playback.wav
Why it lands
"No data ever leaves the Mac" — practical for confidential meetings
Bot-free, offline operation
Language-specific tuning (incl. a Norwegian model)
The trade-offs
High local hardware load — M-series Macs recommended
Slower model download & processing vs cloud tools
Diarization accuracy varies by engine; setup & API-key config are hurdles
Where it fits
Inspired by Granola, built for privacy-sensitive work.
Envisioned for 1:1s and team meetings, lectures and interviews, and sensitive legal, consulting and research settings — an alternative to cloud tools like Fireflies, Otter and Granola when audio must stay in-house. Built with Tauri 2, Rust and Swift, with a self-hostable server for team scale.
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