CHECKED OCT 10, 2026

Compare realtime APIs

Pick up to four APIs from any category and see them side by side.

Synthesia Interactive Avatars
Synthesia
Odyssey API (interactive world model video)
Odyssey
Daydream (hosted StreamDiffusion)
Daydream / Livepeer
CategoryAvatars + videoAvatars + videoAvatars + video
StatusGABetaBeta
Est. per minuten/an/an/a
How that was worked outNo published realtime rate foundNo public price list found; pricing page 404sAPI pricing not confirmed
Pricing modelsubscriptionsubscriptioncredits
Free tierNone found for interactive avatars.Free accounts get 5 concurrent streams; hour quota not published.Unclear for the API.
Connects byLiveKitWebRTC, WebSocketWebRTC
Audio inYour LiveKit agent's TTS audioNoneNone
Audio outYour TTSNot documentedNone
LanguagesNot captured.Text prompts.Text prompts.
Latency (vendor claim)Not captured.Third-party reports about 20-22 fps at 720p (frame every ~50 ms); no official latency figure.Vendor-described sub-second latency (secondary source).
Key limits
  • Up to 5 avatar IDs per session
  • Each stream max 150 s by default (start a new stream to continue)
  • Each connection max 60 min
  • Idle connection with no active stream disconnects after 15 min
  • Up to 10 queued simulation jobs
  • 'Submit StreamDiffusion Prompt' endpoint marked deprecated in the API reference
High-severity warnings
  • No public realtime price
  • No published pricing
  • Pricing and product direction unclear
ComplianceNot verified in this pass.Not verified.Not verified.
Self-hostableNoNoYes
Last checked2026-10-102026-10-102026-10-10
Key numbers and features
Session $/min---
Entry plan $/mo$89--
Free tierNoYes-
Free credit $---
Custom avatar---
From photo---
Own LLMYes--
Own voiceYes--
Interrupts---
Resolution p-720-
FPS-20-
CPU only---
Latency ms---
Languages---
Max session min-2.5-
Concurrency-5-
WebRTCYesYesYes
WebSocket-Yes-
Phone / SIP---
HIPAA---
SOC 2---
EU data---
Self-hostNoNoYes
Open weightsNoNoYes
High warnings111