Voice agents & realtime stack — AI that picks up the phone
Vapi, Retell, Bland, LiveKit Agents, Cartesia, Hume, ElevenLabs, Deepgram, AssemblyAI, Pipecat — build low-latency voice apps without reinventing telephony.
Tools in this cluster
- Vapi
Developer-first voice agent platform with pluggable STT/LLM/TTS and phone numbers—minute-metered pricing for inbound/outbound bots and scheduling agents.
Voice agents / Realtime - Retell AI
Voice agent platform tuned for low latency and natural barge-in—visual orchestration, rented phone numbers, and templates for inbound/outbound call flows.
Voice agents / Realtime - Bland AI
Bland AI: popular AI product—see the official site for features, pricing, supported regions, data handling, and latest model lineup.
Voice agents / Realtime - LiveKit Agents
LiveKit Agents: popular AI product—see the official site for features, pricing, supported regions, data handling, and latest model lineup.
Voice agents / Realtime - Cartesia
Low-latency TTS with streaming APIs and custom voices (Sonic series)—a go-to layer for natural-feeling voice agents and audio products.
Voice agents / Realtime - Hume AI
Hume AI: popular AI product—see the official site for features, pricing, supported regions, data handling, and latest model lineup.
Voice agents / Realtime - ElevenLabs
ElevenLabs: popular AI product—see the official site for features, pricing, supported regions, data handling, and latest model lineup.
Voice / Music - Deepgram
Deepgram: popular AI product—see the official site for features, pricing, supported regions, data handling, and latest model lineup.
Voice agents / Realtime - AssemblyAI
AssemblyAI: popular AI product—see the official site for features, pricing, supported regions, data handling, and latest model lineup.
Voice / Music - Pipecat
Pipecat: popular AI product—see the official site for features, pricing, supported regions, data handling, and latest model lineup.
Voice agents / Realtime