WhisperX vs 
Silero VAD
WhisperX vs Silero VAD compared for 2026 — features, license, ease of use, performance and which one to choose. Whisper plus word timestamps and diarization vs Detect speech in audio, instantly.
Updated regularly · curated by OpenSourceAI.tech
WhisperX vs Silero VAD at a glance
| Spec | WhisperX | Silero VAD |
|---|---|---|
| Category | Speech (STT / TTS) | Speech (STT / TTS) |
| Type | STT with alignment | Voice activity detection |
| License | BSD-2-Clause | MIT |
| Runs locally | Yes | Yes |
| Primary language | Python | Python |
| Ease of use | Intermediate | Beginner |
| Best for | subtitles and multi-speaker transcripts | real-time voice assistants |
| GitHub stars | 23.1k | — |
How WhisperX and Silero VAD score
| Criterion | WhisperX | Silero VAD |
|---|---|---|
| Popularity | 3.5 | n/a |
| Maintenance | 5.0 | n/a |
| Ease of use | 3.5 | 5.0 |
| Privacy | 5.0 | 5.0 |
| License freedom | 5.0 | 5.0 |
Scores are computed automatically from public signals — GitHub stars (popularity), recent commit activity (maintenance), license type (freedom), local-first design (privacy) and onboarding complexity (ease of use). Indicative, not a verdict.
What each one is
WhisperX
WhisperX adds accurate word-level timestamps and speaker diarization on top of Whisper, ideal for subtitles and multi-speaker transcripts.
- Accurate word-level timestamps
- Speaker diarization built in
- Great for subtitles and meeting transcripts
Silero VAD
Silero VAD detects which parts of an audio stream contain speech, in under a millisecond per chunk — essential for real-time voice pipelines.
- Sub-millisecond detection
- Tiny model, runs anywhere
- Essential for streaming voice
Key differences
WhisperX is sTT with alignment, while Silero VAD is voice activity detection. Their licenses differ (BSD-2-Clause vs MIT), which matters if you ship a commercial product. WhisperX leans more intermediate-friendly, whereas Silero VAD is more suited to beginner users. In short, WhisperX fits subtitles and multi-speaker transcripts, and Silero VAD fits real-time voice assistants.
Which should you choose?
Choose WhisperX for subtitles and multi-speaker transcripts. Choose Silero VAD for real-time voice assistants.
There is rarely one winner — many setups use both. The right pick depends on your hardware, your team's skills, and whether you value simplicity or control.
Frequently asked questions
Is WhisperX or Silero VAD easier to use?
Silero VAD is generally the easier of the two to get started with, while WhisperX rewards more setup with more control.
Are WhisperX and Silero VAD free?
WhisperX is free and open source (BSD-2-Clause), and Silero VAD is free and open source (MIT). Neither charges for the core software.
Can I run WhisperX and Silero VAD locally?
WhisperX: yes · Silero VAD: yes. Both can be used without sending your data to a third-party cloud where their setup allows.
WhisperX vs Silero VAD — which should I pick in 2026?
Choose WhisperX for subtitles and multi-speaker transcripts. Choose Silero VAD for real-time voice assistants.
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