Build, deploy, and scale real-time voice and video applications with ease. | Freemium | - Ultra-low latency: Achieve sub-100ms latency for real-time audio and video communication, ensuring seamless interactions.
- Scalable infrastructure: Built on WebRTC and optimized for scalability, LiveKit supports applications ranging from small group calls to large-scale broadcasts.
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Open source framework for real-time voice AI agents | Free tier | - **Multimodal Orchestration**: Coordinate voice, video, text, and images in a single pipeline with frame-level control. You decide exactly how data moves through your agent.
- - **200+ Swappable Providers**: Switch speech-to-text, LLM, text-to-speech, and vision services, usually with one line of code. You can test a new model without rewriting your app.
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AI receptionist and business agent for local businesses | Free tier | - **24/7 AI Receptionist**: Answers inbound calls with a real conversation instead of voicemail or a phone tree. It captures the caller's name, number, address, service need, urgency, and custom fields, then hands off anything that needs a human.
- - **Business Phone Line**: You get a dedicated number for calls and texts on iOS, Android, and the web. You can keep your current number by forwarding or porting it, or pick a new one.
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AI roleplay coach for high-stakes conversations | Free tier | - **AI roleplay scenarios**: Practice discovery calls, objection handling, performance reviews, or interviews with an AI that stays in character and pushes back. It adapts to your responses instead of reading from a script.
- - **Quantified speech analytics**: Every session is scored for filler words (um, uh, like) with timestamps, words per minute, weak or hedging language, conciseness, and eye contact estimates on video.
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White-label AI voice agents you resell under your brand | Freemium | - **Full white-label branding**: Run everything on your own domain with your logo, themes, and client portals. Your customers see your brand, not Retell or Vapi.
- - **Multi-provider voice support**: Deploy agents built on Retell AI, Vapi, ElevenLabs, LiveKit, or Ultravox. You are not locked into a single voice vendor.
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AI speaking coach for real English conversation practice | Freemium | - **Voice-First Conversation Practice**: You speak, the AI responds, and the conversation keeps moving. This is talking practice, not tapping through multiple-choice drills.
- - **Five English Varieties**: Choose American, British, Australian, Indian, or Welsh English depending on who you actually need to understand and be understood by.
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AI workspace for interactive docs, slides & voice agents | Free tier | - **AI Document Generation**: Create slides, docs, sheets, and forms from a simple prompt or upload existing files to convert into interactive content.
- - **Interactive Voice Agents**: Let your audience talk to your business content using natural voice conversations powered by AI.
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AI video generator with lifelike avatars and voices | Freemium | - **1,700+ AI Avatars**: Pick from a large library of photorealistic digital presenters with natural gestures, facial expressions, and automated lip-sync mapped to your script.
- - **2,680+ AI Voices in 140+ Languages**: Access lifelike text-to-speech voices for global content, plus voice cloning to replicate your own voice for consistent branding.
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Safe AI bedtime companion for kids | Freemium | - **Cleo the Cloud AI Companion**: A conversational voice AI that talks with your child, remembers their favorite things, and shapes stories around what they care about.
- - **Personalized Stories & Lullabies**: Generates brand-new bedtime tales and original lullabies on demand, built around your child's name, interests, and imagination.
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