Head to head

Deepgram vs AssemblyAI

Deepgram (Deepgram) and AssemblyAI (AssemblyAI) both sit in Audio. AssemblyAI is the cheaper entry point at Free tier · from $0.15/1M tok. Deepgram shipped more tracked changes in the last 30 days (11 vs 8). Every value below comes from the latest crawl of the vendors' own pages.

Attribute	Deepgram Deepgram	AssemblyAI AssemblyAI
Segment	Audio	Audio
Version	Nova-3	Universal-3.6 Pro Realtime
Entry cost	Free tier · from $4,000/min	Free tier · from $0.15/1M tok
Pricing tiers	Free free · Growth $4000	Free Credits free · Universal-2 Async STT $0.15 · Universal-Streaming English / Multilingual $0.15 · Universal-3.5 Pro Async STT $0.21 · Universal-3.6 Pro Realtime STT $0.45 · Text-to-Speech (AssemblyAI-TTS-1) $15
Model stack	Aura-1 · Aura-2 · Flux · Flux English · Flux Multilingual · Flux STT · Flux TTS · flux-general-en · flux-general-multi · Nova-3 · Nova-3 Medical · Nova-3 Monolingual · Nova-3 Multilingual · Nova-3 Pharma · phoneLLM mini · Think-Fast · Whisper · Whisper Cloud · Whisper Large	AssemblyAI-TTS-1 · Claude · Claude 4.6 Sonnet · Claude 4.8 Opus · Gemini 2.5 Pro · Gemini 3.5 Flash · GPT-5.5 · Qwen3 Next 80B A3B · u3-rt-pro · Universal-2 · universal-3-6-pro · universal-3-pro · Universal-3.5 Pro · Universal-3.5 Pro Realtime · Universal-3.6 Pro Realtime · Universal-Streaming English · Universal-Streaming Multilingual
Context window	n/a	n/a
Public API
Routes models
Changes / 30d	11	8
Origin	Global	Global
Capabilities	Real-time streaming, Keyterm prompting, Multilingual, Voice agent API, Text to speech, Speech-to-Text, Text-to-Speech, Voice Agent API	Speaker diarization, Summarisation, Topic detection, PII redaction, LeMUR framework, Pre-recorded STT, Real-time STT, Voice Agent API

Deepgram

Low-latency streaming transcription and voice agent infrastructure.

Full Deepgram record →

AssemblyAI

Transcription plus summarisation, topic detection and speaker labels for developers.

Full AssemblyAI record →

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