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Krisp Voice Translation API screenshot

What is Krisp Voice Translation API?

The Krisp Voice Translation API is a real-time speech-to-speech translation service that converts spoken audio from one language into spoken audio in another, handling transcription, translation and speech synthesis in a single pipeline. It supports any-to-any translation across more than 60 languages and includes built-in background voice cancellation to keep accuracy high on noisy calls. Developers connect over a WebSocket API with Python and JavaScript SDKs and configure each session through a single JSON payload. It is aimed at contact centres and voice applications where transcription accuracy on real, accented and noisy calls matters.

Key Features

Real-time speech-to-speech translation

Converts spoken audio between languages live, covering transcription, translation and speech synthesis in one pipeline.

60+ languages any-to-any

Translates across more than 60 languages including locale variants such as US Spanish, French Canadian and Egyptian Arabic.

Background Voice Cancellation

Removes background noise, competing voices and reverberation to keep translation accurate on noisy calls.

Accent-robust recognition

Maintains accuracy with minimal degradation when speakers have strong accents.

Custom vocabulary and dictionary

Lets you add domain-specific terms and per-language-pair translation rules.

WebSocket API and SDKs

Streams audio over a WebSocket endpoint with Python and JavaScript/Node.js SDKs, and a C++ SDK listed as coming soon.

Session configuration via JSON

Controls languages, voice, custom vocabulary, BVC and transcripts through a single JSON object per session.

Pros & Cons

Advantages

  • Reports 96% accuracy on real enterprise calls that include accents and background noise.
  • Built-in background voice cancellation reduces the need for separate audio cleanup before translation.
  • Self-serve signup with a free tier and no sales call required lowers the barrier to testing.
  • Covers more than 60 languages with any-to-any translation and locale-specific variants.
  • Enterprise-grade compliance including SOC 2, GDPR, HIPAA and PCI-DSS, with no voice data stored on Krisp servers.

Limitations

  • Paid plans start at $249 per month, which may be high for small projects or hobbyist use.
  • The lower tiers cap monthly hours and concurrent connections, so heavy usage pushes you towards overage charges or Enterprise pricing.
  • Community-only support on the Starter plan, with email support reserved for higher tiers.
  • The C++ SDK is listed as coming soon, so native integrations beyond Python and JavaScript are limited for now.

Use Cases

Contact centres adding live translation so agents and customers can speak in their own languages on the same call.

Voice AI and conversational agent builders embedding real-time translation into their applications.

Telephony and headset-based products that need accurate translation despite noisy audio.

Multilingual customer support teams handling calls across many regional language variants.

Businesses needing compliant voice translation under SOC 2, HIPAA or PCI-DSS requirements.

Developers prototyping speech-to-speech translation using the free tier before committing to a paid plan.