Head to head

PlayAI vs AssemblyAI

PlayAI (PlayAI) and AssemblyAI (AssemblyAI) both sit in Audio. AssemblyAI is the cheaper entry point at Free tier with $50 free credits, then pay-as-you-go starting at $0.15/hr for pre-recorded STT (Universal-2). AssemblyAI shipped more tracked changes in the last 30 days (5 vs 0). Every value below comes from the latest crawl of the vendors' own pages.

AttributePlayAI

PlayAI

AssemblyAI

AssemblyAI

SegmentAudioAudio
VersionPlayDialogUniversal-3.5 Pro
Entry costFree tier · from $31.2/moFree tier with $50 free credits, then pay-as-you-go starting at $0.15/hr for pre-recorded STT (Universal-2)
Pricing tiersFree Credits free
Model stackPlayDialogClaude · 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-pro · Universal-3.5 Pro · Universal-3.5 Pro Realtime · Universal-Streaming English · Universal-Streaming Multilingual
Context windown/a
Public API
Routes models
Changes / 30d05
OriginGlobalGlobal
CapabilitiesConversational TTS, Voice cloning, AgentsSpeaker diarization, Summarisation, Topic detection, PII redaction, LeMUR framework, Pre-recorded STT, Real-time STT, Voice Agent API
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