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Head to head

AssemblyAI vs Deepgram

AssemblyAI (AssemblyAI) and Deepgram (Deepgram) 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.

AttributeAssemblyAI

AssemblyAI

Deepgram

Deepgram

SegmentAudioAudio
VersionUniversal-3.6 Pro RealtimeNova-3
Entry costFree tier · from $0.15/1M tokFree tier · from $4,000/min
Pricing tiersFree 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) $15Free free · Growth $4000
Model stackAssemblyAI-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 MultilingualAura-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
Context windown/an/a
Public API
Routes models
Changes / 30d811
OriginGlobalGlobal
CapabilitiesSpeaker diarization, Summarisation, Topic detection, PII redaction, LeMUR framework, Pre-recorded STT, Real-time STT, Voice Agent APIReal-time streaming, Keyterm prompting, Multilingual, Voice agent API, Text to speech, Speech-to-Text, Text-to-Speech, Voice Agent API
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