SPEECH-TO-TEXT
Ink-Whisper: streaming speech-to-text
Ink-Whisper: streaming speech-to-text
The fastest, most affordable real-world transcription model for conversational AI


From Sonic to Ink: fastest voice out,
now fastest voice in
Fastest TTCT. Ink-Whisper has the fastest time-to-complete-transcript for fluid, responsive interactions


Real-world accuracy. Get clear transcriptions despite everyday background noise, accents, and jargon


Most affordable. Ink-Whisper is the lowest cost streaming STT at 1 credit/sec ($0.13/hr on our Scale plan)


Purpose-built for voice agents, flexible for all streaming speech
Voice agents
Ink-Whisper delivers ultra-fast, accurate transcription that powers responsive experiences for human-agent conversations for support and sales to healthcare and finance.
Live captioning
Real-time translations


Purpose-built for voice agents, flexible for all streaming speech
Voice agents
Ink-Whisper delivers ultra-fast, accurate transcription that powers responsive experiences for human-agent conversations for support and sales to healthcare and finance.
Live captioning
Real-time translations


Purpose-built for voice agents, flexible for all streaming speech
Voice agents
Ink-Whisper delivers ultra-fast, accurate transcription that powers responsive experiences for human-agent conversations for support and sales to healthcare and finance.
Live captioning
Real-time translations


MEDIAN
P90
Cartesia Streaming
Ink-Whisper
66ms
Fireworks Whisper Streaming
70ms
Deepgram Nova3 Streaming
74ms
AssemblyAI Universal Streaming
737ms
The fastest streaming model
Delivering the most fluid conversations, Ink-Whisper has the fastest time-to-complete-transcript (TTCT) of any streaming speech-to-text model we’ve tested.
66ms
time-to-complete-transcript
MEDIAN
P90
Cartesia Streaming
Ink-Whisper
66ms
Fireworks Whisper Streaming
70ms
Deepgram Nova3 Streaming
74ms
AssemblyAI Universal Streaming
737ms
The fastest streaming model
Delivering the most fluid conversations, Ink-Whisper has the fastest time-to-complete-transcript (TTCT) of any streaming speech-to-text model we’ve tested.
66ms
time-to-complete-transcript
MEDIAN
P90
Cartesia Streaming
Ink-Whisper
66ms
Fireworks Whisper Streaming
70ms
Deepgram Nova3 Streaming
74ms
AssemblyAI Universal Streaming
737ms
The fastest streaming model
Delivering the most fluid conversations, Ink-Whisper has the fastest time-to-complete-transcript (TTCT) of any streaming speech-to-text model we’ve tested.
66ms
time-to-complete-transcript
Optimized for accuracy in real-world complexity
Optimized for accuracy in real-world complexity
Ink-Whisper delivers accurate transcription in the highly variable conditions of real-world conversation where standard STT models fall short
Audio Quality and Environment
Audio Quality and Environment

AUDIO
Telephony Artifacts
Due to compression, or low-bandwidth audio.

TRANSCRIPTION

TRANSCRIPTION

AUDIO
Telephony Artifacts
Due to compression, or low-bandwidth audio.

TRANSCRIPTION

AUDIO
Background noise
Like traffic, chatter, babies, static

TRANSCRIPTION

TRANSCRIPTION

AUDIO
Background noise
Like traffic, chatter, babies, static

TRANSCRIPTION
Elements of Natural Conversation
Elements of Natural Conversation

AUDIO
Disfluencies
Like "um", “ah” and pauses

TRANSCRIPTION

TRANSCRIPTION

AUDIO
Disfluencies
Like "um", “ah” and pauses

TRANSCRIPTION

AUDIO
Accents
Globally diverse voices and pronunciations

TRANSCRIPTION

TRANSCRIPTION

AUDIO
Accents
Globally diverse voices and pronunciations

TRANSCRIPTION
Linguistic complexity
Linguistic complexity

AUDIO
Proper nouns and domain terms
Like brands, medical or financial terms

TRANSCRIPTION

TRANSCRIPTION

AUDIO
Proper nouns and domain terms
Like brands, medical or financial terms

TRANSCRIPTION
Get started quickly and confidently
Voice platform integrations
Voice platform integrations
Voice platform integrations
Rapidly deploy Ink-Whisper to your voice agent through our seamless integrations with Vapi, LiveKit, and Pipecat.


Lowest-cost
Lowest-cost
The most affordable streaming STT at just 1 credit per 1 second ($0.13/hr) on our Scale plan.


Enterprise-grade
Enterprise-grade
With enterprise-grade compliance (SOC 2 Type II, HIPAA, PCI) and custom SLAs, you can trust us for reliability and security.


Regions
Regions
Regions