ostt is an interactive terminal-based audio recording and speech-to-text transcription tool. Record audio with real-time waveform visualization, automatically transcribe using multiple AI providers and models, and maintain a browsable history of all your transcriptions.
Built with Rust for performance and minimal dependencies, ostt works seamlessly on Linux and macOS.
This is free and open source software.
Key Features
- Real-time waveform visualization with sparkline graphs.
- dBFS-based volume metering (industry standard).
- Configurable reference level for clipping detection.
- Audio clipping detection with pause/resume support.
- Audio compression for fast API calls.
- Multiple transcription providers (OpenAI, Deepgram).
- Browsable transcription history.
- Keyword management for improved accuracy.
- Cross-platform: Linux and macOS support.
Website: github.com/kristoferlund/ostt
Support:
Developer: Kristofer Lund
License: MIT License

ostt is written in Rust. Learn Rust with our recommended free books and free tutorials.
Related Software
| Speech Recognition Tools | |
|---|---|
| Whisper | Automatic speech recognition (system trained on 680,000 hours of data |
| Flashlight | Fast, flexible machine learning library written entirely in C++. |
| Coqui STT | Deep-learning toolkit for training and deploying speech-to-text models |
| Kaldi | C++ toolkit designed for speech recognition researchers. |
| SpeechBrain | All-in-one conversational AI toolkit based on PyTorch |
| Handy | Offline speech-to-text application |
| ESPnet | End-to-End speech processing toolkit |
| deepspeech.pytorch | Implementation of DeepSpeech2 using Baidu Warp-CTC. |
| Whispering | Transcription application with global speech-to-text functionality |
| Julius | Two-pass large vocabulary continuous speech recognition engine |
| CMUSphinx | Speech recognition system for mobile and server applications |
| Simon | Flexible speech recognition software |
| hyprwhspr | Native speech-to-text designed for Arch / Omarchy |
| ostt | Open Speech-to-Text |
| DeepSpeech | TensorFlow implementation of Baidu's DeepSpeech architecture. |
| OpenSeq2Seq | TensorFlow-based toolkit for sequence-to-sequence models |
| Eesen | End-to-End Speech Recognition |
Read our verdict in the software roundup.
Explore our comprehensive directory of recommended free and open source software. Our carefully curated collection spans every major software category.This directory is part of our ongoing series of informative articles for Linux enthusiasts. It features hundreds of detailed reviews, along with open source alternatives to proprietary solutions from major corporations such as Google, Microsoft, Apple, Adobe, IBM, Cisco, Oracle, and Autodesk. You’ll also find interesting projects to try, hardware coverage, free programming books and tutorials, and much more. Discovered a useful open source Linux program that we haven’t covered yet? Let us know by completing this form. |

