Real-Time Speech-to-Text APIs in AI answers

Data as of Oct 21, 2026Based on 237 AI responsesReviewed by Dimitry Apollonsky

AI summary

AssemblyAI holds a clear lead across real-time speech-to-text questions, recommended widely for speaker diarization and voice agent transcription. When buyers ask specifically for multilingual accuracy, Deepgram is the usual answer.

Most-mentioned brands

Rank and Mentioned in · since Jul 5

#	Brand	Recommended for	Mentioned in
1	AssemblyAI 92% streaming transcription with built-in speaker diarization and audio intelligence	streaming transcription with built-in speaker diarization and audio intelligence	92%
2	Deepgram 85% low-latency audio processing and fast multilingual transcription workflows	low-latency audio processing and fast multilingual transcription workflows	85%
3	Google Cloud Speech-to-TextAlphabet product line 48% meeting transcripts and multichannel diarization across many languages	meeting transcripts and multichannel diarization across many languages	48%
3	Speechmatics 47% flexible enterprise deployments and accurate transcription across diverse accents	flexible enterprise deployments and accurate transcription across diverse accents	47%
5	OpenAI 31% speaker-aware transcription using models with timestamps and segment tracking	speaker-aware transcription using models with timestamps and segment tracking	31%
5	Azure AI SpeechMicrosoft product line 28% streaming transcription with live speaker attribution via its SDK	streaming transcription with live speaker attribution via its SDK	28%
7	Elevenlabs 22% accurate transcription compared alongside dedicated real-time speech services	accurate transcription compared alongside dedicated real-time speech services	22%
7	Deepgram Nova-3 21% integrated streaming speech recognition paired directly with native diarization	integrated streaming speech recognition paired directly with native diarization	21%
7	Soniox 19% automatic multi-speaker tracking over live streams and noisy audio	automatic multi-speaker tracking over live streams and noisy audio	19%
10	Pyannote AI 16% dedicated streaming speaker diarization pipelines running alongside speech recognition	dedicated streaming speaker diarization pipelines running alongside speech recognition	16%
10	Gladia 14%		14%
10	Recall.ai 14%		14%
13	Google Cloud PlatformAlphabet product line 11%		11%
13	OpenAI Realtime APIOpenAI product line 10%		10%
13	OpenAI WhisperOpenAI product line 10%		10%
13	Microsoft AzureMicrosoft product line 9%		9%
13	Amazon TranscribeAmazon product line 9%		9%
18	AWSAmazon product line 6%		6%
18	Universal-3.6 Pro RealtimeAssemblyAI product line 5%		5%
18	Picovoice 5%		5%
18	Rev.ai 4%		4%
22	Nylas Notetaker APINylas product line 3%		3%
22	OpenAI APIOpenAI product line 3%		3%
22	Inworld 3%		3%
22	Nylas 2%		2%
22	pyannote.audio 2%		2%
22	MeetingBaaS 2%		2%
22	OpenAI PlatformOpenAI product line 2%		2%
22	OpenAI Realtime TranscriptionOpenAI product line 2%		2%
22	Amazon Transcribe StreamingAmazon product line 2%		2%
31	Scribe Realtime 1%		1%
31	Azure MAI-Transcribe-2-Streaming 1%		1%
31	Flux 1%		1%
31	Azure Custom Neural VoiceMicrosoft product line 1%		1%
31	NVIDIA RivaNVIDIA product line 1%		1%
31	GPT-4oOpenAI product line 1%		1%
31	NVIDIA NeMo Data DesignerNVIDIA product line 1%		1%
31	Faster-Whisper 1%		1%
31	Gradium 1%		1%
31	Zoom 1%		1%
31	GoogleOwned by Alphabet 1%		1%
31	AssemblyAI Realtime Speech-to-Text APIAssemblyAI product line <1%		<1%
31	GeminiAlphabet product line <1%		<1%
31	Pipecat <1%		<1%
31	Twilio <1%		<1%
31	Real-time STT API <1%		<1%
31	VoxtralMistral product line <1%		<1%
31	Utter <1%		<1%
31	Speechmatics Agent STTSpeechmatics product line <1%		<1%
31	Deepgram Streaming Audio APIDeepgram product line <1%		<1%
31	Dobot <1%		<1%
31	VoskAlphacephei product line <1%		<1%
31	Amazon Web ServicesAmazon product line <1%		<1%
31	Smallest AI <1%		<1%
31	Speechmatics Real-Time ASRSpeechmatics product line <1%		<1%
31	Universal <1%		<1%
31	Sonix <1%		<1%
31	Brainiall <1%		<1%
31	Groq <1%		<1%
31	Humain <1%		<1%
31	Happy Scribe <1%		<1%
31	UniversalX <1%		<1%
31	Inworld Realtime STTInworld product line <1%		<1%
31	Whisper.cpp <1%		<1%
31	Diart <1%		<1%
31	Picovoice FalconPicovoice product line <1%		<1%
31	Silero VAD <1%		<1%
31	Agora <1%		<1%
31	NVIDIA Inference (NVIDIA Inference Stack)NVIDIA product line <1%		<1%
31	Webex Go <1%		<1%
31	Otter.ai <1%		<1%
31	TensorRT-LLM <1%		<1%
31	V2 StreamingV2 product line <1%		<1%
31	Fireflies <1%		<1%
31	MAI-Streaming <1%		<1%
31	MAI-Transcribe-2Microsoft product line <1%		<1%
31	Speechmatics Enhanced RealtimeSpeechmatics product line <1%		<1%
31	Azure Voice Live APIMicrosoft product line <1%		<1%
31	Azure Bot Service <1%		<1%
31	Vapi <1%		<1%
31	Cartesia <1%		<1%
31	Retell AI <1%		<1%
31	Google CloudAlphabet product line <1%		<1%
31	ElevenLabs Speech-to-TextElevenlabs product line <1%		<1%

Mentioned in on each engineChatGPT SearchGoogle AI Mode

Widest split: Google Cloud Speech-to-Text, 66% on ChatGPT Search and 30% on Google AI Mode.

Mentioned in on each AI engine, by brand
Brand	ChatGPT Search	Google AI Mode
AssemblyAI	93%	91%
Deepgram	94%	76%
Google Cloud Speech-to-Text	66%	30%
Speechmatics	48%	47%
OpenAI	33%	29%
Azure AI Speech	31%	26%
Elevenlabs	11%	33%
Soniox	8%	30%
Deepgram Nova-3	18%	24%
Recall.ai	17%	12%

Latest insights

Weeks of Aug 3 – Sep 6, 2026 · Since Jul 5

Deepgram Gap between platforms: The platform gap for Deepgram in Real-Time Speech-to-Text APIs narrowed to 20 points, ChatGPT Search ahead
Google Cloud Speech-to-Text Gap between platforms: Google Cloud Speech-to-Text's platform gap in Real-Time Speech-to-Text APIs widened: ChatGPT Search 64.6%, Google AI Mode 30.6%
Speechmatics Gap between platforms: The platform gap for Speechmatics in Real-Time Speech-to-Text APIs widened to 29.7 points, Google AI Mode ahead
Google Cloud Speech-to-Text Slipping: AI answers in Real-Time Speech-to-Text APIs name Google Cloud Speech-to-Text less often: mention rate declined from 51.7% to 45%
Google Cloud Speech-to-Text Slipping: Google Cloud Speech-to-Text fell behind Speechmatics in Real-Time Speech-to-Text APIs

and 7 more insightssee the ranking

Market map

Mentioned in · since Jul 5

Leading brands by topic

Speaker diarizationLed byAssemblyAI
Multilingual audio transcriptionTied:DeepgramAssemblyAI
Low-latency audio processingTied:DeepgramAssemblyAI
Voice agent transcriptionLed byAssemblyAI

Questions by topic3

Speaker diarization
- I'm looking for an API that provides real-time, accurate speaker diarization (who spoke when) from an audio stream.
- Which APIs support accurate, real-time speaker labeling for incoming audio streams?
- I need a real-time API that can accurately label different speakers in a live audio feed. What are my options?
- Who provides a voice-to-text API that supports speaker diarization for meeting transcripts?
Multilingual audio transcription
- Which API service offers the most accurate, real-time audio transcription in multiple languages?
- I need a real-time speech-to-text API that handles multiple languages accurately. What are the best options?
- Which APIs provide the best accuracy for live, multilingual audio transcription?
- What's a good API service for highly accurate, real-time audio transcription in multiple languages?
Low-latency audio processing
- Can you recommend speech-to-text services that support responsive, low-latency audio processing?
- Which real-time transcription services are best for applications requiring highly responsive, low-latency audio input?
- Which speech-to-text providers are best for real-time applications where low-latency audio processing is critical?

Sources AI cites100

75% of citations point at the ranked brands’ own sites. youtube.com, reddit.com, modulate.ai are the most-cited sites outside the ranked brands’ own domains.

Real-Time Speech-to-Text APIs in AI answers

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