whisper.cpp vs WhisperX
A side-by-side comparison of two self-hosted self-hosted ai options — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
whisper.cpp
Fast C++ port of OpenAI Whisper speech recognition
VS
WhisperX
Fast Whisper transcription with word-level timestamps and diarization
| Feature | whisper.cpp | WhisperX |
|---|---|---|
| Category | Self-Hosted AI | Self-Hosted AI |
| License | MIT | BSD-3-Clause |
| Language | C++ | Python |
| Setup difficulty | Medium | Medium |
| Min. RAM | 1,024 MB | 4,096 MB |
| Deployment | binary, source | bare-metal, source |
| GitHub stars | ★ 52,677 | ★ 23,473 |
| First released | 2022 | 2023 |
| Replaces | Otter.ai, Google Speech-to-Text | Otter.ai, Rev |
Why pick each one
Choose whisper.cpp if…
- Released under the MIT license
- Mature project with 52.7k GitHub stars
- Written in C++
Choose WhisperX if…
- Released under the BSD-3-Clause license
- Mature project with 23.5k GitHub stars
- Written in Python
Frequently asked questions
Is whisper.cpp or WhisperX better?
Neither is universally better. whisper.cpp has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are whisper.cpp and WhisperX free and open-source?
Yes. whisper.cpp is licensed under MIT and WhisperX under BSD-3-Clause. Both can be self-hosted at no software cost.
Can I run whisper.cpp and WhisperX with Docker?
whisper.cpp: check the project docs for container support. WhisperX: check the project docs for container support.