Murmure
An offline speech-to-text app runs on Windows, macOS and Linux with CPU-only transcription, custom vocabulary and optional local or remote LLM rewriting.
Alternative to:

Murmure turns speech into text on your computer for people dictating notes, documents or code who want to keep recordings off cloud transcription services. It uses NVIDIA Parakeet and works offline without an account.
- Dictation across apps: Global keyboard shortcuts let you dictate without leaving your editor or other application, with support for European languages including English, French, German, Russian and Ukrainian.
- Vocabulary and formatting: A custom dictionary handles names and specialist terms, while formatting rules control capitalization, punctuation, digits and text replacements.
- Optional LLM processing: Connect your own local or remote LLM server to rewrite dictated text or answer spoken commands; choosing a remote server sends that content outside your machine.
- Hands-free input: Voice trigger, validation and cancel words control dictation, and a phone can act as a wireless microphone for your PC.
- Tool integration: A local HTTP API lets other software use its transcription capabilities.
Murmure is free, open source under AGPL-3.0, and available for Windows, Linux and macOS, including Intel and Apple Silicon Macs. Transcription runs on a CPU without a GPU. The recommended resources are 2 GB of available RAM and 1 GB of disk space.
It deletes audio after transcription, keeps recent transcript history only in RAM until you quit, and doesn't write transcripts to logs. It has no telemetry or tracking. On GNOME Wayland, push-to-talk isn't available.