Cobra
Voice Activity Detection

powered by deep learning, efficient, and hyper cross-platform

Accurate

Cobra outperforms existing solutions with wide margins. Compared to WebRTC VAD, Cobra achieves a much higher true-positive rate at any given false-positive operating point. Picovoice is the only speech technology provider that provides open-source and reproducible benchmarks. [1]

Private

All voice data is processed on-device. Intrinsically HIPAA and GDPR compliant.

Zero-Latency

Edge-first architecture eliminates unpredictable network delay.

Free Tier

Start building for free. Small projects can remain free, forever.

Try it!

Press the microphone button to activate the demo.

cobra = pvcobra.create('${ACCESS_KEY}')

while True:
    is_voiced = cobra.process(audio_frame())

Build with Python

Cobra cobra = new Cobra("${ACCESS_KEY}");
    
while(true) {
    float isVoiced = cobra.process(audioFrame());
}

Build with Android

let cobra = Cobra(accessKey: "${ACCESS_KEY}")

while true {
    let isVoiced = cobra.process(audioFrame())
}

Build with iOS

let worker = await CobraWorkerFactory.create(
    "${ACCESS_KEY}",
    (isVoiced) => {});

const processor = await WebVoiceProcessor.init(
    {engines: [worker]});

processor.start();

Build with Web