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Pi vs Inworld AI
Side-by-side comparison of features, pricing, and ratings
Real-time voice AI with top-ranked TTS and LLM routing for emotionally engaging conversations.
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Freemium
Freemium
Plans
$0/mo
$0/mo
$25/mo
$100/mo
$300/mo
$1,500/mo
Custom
Popularity
3.4k views
3.0k views
Skill Level
Beginner-friendly
Intermediate
API Available
Platforms
Web
WebAPI
Categories
🎙️ Voice & Speech
💻 Code & Development🎙️ Voice & Speech
Features
Voice conversations on mobile
Long-term memory of past chats
Empathetic, emotionally intelligent responses
Daily check-ins and reflection prompts
Brainstorming support
Cross-platform (iOS, Android, web)
Text and voice input
Personalized responses with context memory
Sub-130ms first-chunk latency TTS
Realtime TTS-2 voice model
TTS-1.5 with improved expression and stability
Voice cloning from 15 seconds of audio
Cross-lingual cloning across 100+ languages
Text-based voice design by description
Advanced voice direction with bracketed instructions
Full-duplex audio streaming via WebSocket/WebRTC
Context-aware turn detection
Function calling during speech
Provider-agnostic LLM routing to 220+ models
Dynamic context management mid-session
AI failover and A/B testing via Realtime Router
Multimodal support: vision and audio input
STT at $0.10 per hour (Growth plan)
Integrations
OpenAI
Anthropic
Google
LiveKit
Vapi
Stream
k-ID
VoiceRun
Mastra