agent capability/voice # Voice I/O Realtime voice or telephony input/output. 9 active agents tagged · verified against the catalog seed. TAGGED ## 9 agents with voice i/o [Sierra Sierra · digital-employee chat/voice/api · cloud · Outcome-based (per resolved conversation); enterprise contracts](https://www.agentlist.io/systems/sierra) [Decagon Decagon · digital-employee chat/voice/api · cloud · Enterprise; per-resolution or per-conversation pricing — quote-based](https://www.agentlist.io/systems/decagon) [Vapi Vapi · voice-agent api/voice · cloud · Usage-based: ~$0.05/min platform fee + model/telephony costs](https://www.agentlist.io/systems/vapi) [Bland AI Bland AI · voice-agent api/voice · cloud · Usage-based per-minute; enterprise plans](https://www.agentlist.io/systems/bland) [Retell AI Retell AI · voice-agent api/voice · cloud · Usage-based (~$0.07+/min); enterprise plans](https://www.agentlist.io/systems/retell) [Synthflow Synthflow · voice-agent api/voice · cloud · Plans from ~$29/mo; per-minute overages](https://www.agentlist.io/systems/synthflow) [ElevenLabs Agents ElevenLabs · voice-agent api/voice · cloud · Included in ElevenLabs plans; per-minute credits](https://www.agentlist.io/systems/elevenlabs-agents) [Deepgram Voice Agent Deepgram · voice-agent api/voice · cloud · Pay-as-you-go per-minute (~$0.08/min) — verify](https://www.agentlist.io/systems/deepgram-voice-agent) [Grok Voice Agent API xAI · voice-agent api/voice · cloud · $0.08/min agent audio; telephony +$0.01/min; STT $0.10-0.20/hr; TTS $4.20/M chars](https://www.agentlist.io/systems/grok-voice) RELATED ## Related capabilities - [Background runs](https://www.agentlist.io/capabilities/background-tasks) - [Browser operation](https://www.agentlist.io/capabilities/browser-ops) - [Cited answers](https://www.agentlist.io/capabilities/citations) - [Code execution](https://www.agentlist.io/capabilities/code-exec) - [Code review](https://www.agentlist.io/capabilities/code-review) - [Desktop control](https://www.agentlist.io/capabilities/desktop-use) - [File editing](https://www.agentlist.io/capabilities/file-edits) - [Git & PRs](https://www.agentlist.io/capabilities/git-pr) - [Human handoff](https://www.agentlist.io/capabilities/human-handoff) - [Incident response](https://www.agentlist.io/capabilities/incident-response) - [Long-horizon tasks](https://www.agentlist.io/capabilities/long-horizon) - [Model routing](https://www.agentlist.io/capabilities/model-routing) - [Persistent memory](https://www.agentlist.io/capabilities/memory) - [Repo context](https://www.agentlist.io/capabilities/repo-context) - [Shell access](https://www.agentlist.io/capabilities/shell) - [Web research](https://www.agentlist.io/capabilities/web-research) - [Workflow builder](https://www.agentlist.io/capabilities/workflow-builder) --- Source: [Voice I/O — 9 AI agents | agentlist.io](https://www.agentlist.io/capabilities/voice). This is the public page rendered as Markdown; interactive controls require the website.