🎙 Voice Agents
Audience: practitioners · Evidence class: mixed
| Platform |
Description |
| ElevenLabs |
Voice platform with conversational AI, multimodal support, batch calling, and compliance-oriented deployment options. |
| Vapi |
Developer-first. Low-latency, model-agnostic. |
| Bland AI |
Outbound call automation. CRM integration. SOC2/HIPAA. |
| Voiceflow |
No-code voice and chat builder. Drag-and-drop. |
| Synthflow |
No-code voice agents for SMBs. Templates. |
| PolyAI |
Enterprise. Natural multi-turn. Hospitality/retail. |
| Retell AI |
Human-like voice agents. Multi-language. Telephony. |
| HeyGen |
Talking avatars. Voice cloning. Lip-sync translation. |
| Synthesia |
AI video avatars. 120+ languages. Enterprise. |
| Deepgram |
STT and TTS APIs. Sub-300ms latency. |
| AssemblyAI |
STT with diarization, sentiment, summarization. |
Open-Source Voice
| Tool |
Description |
| LiveKit Agents |
OSS real-time voice/video AI agents. |
| Rasa |
OSS conversational AI. Self-hosted. NLU training. |
| Pipecat |
OSS voice and multimodal conversational AI. |
| Vocode |
OSS voice-based LLM agents. |