From AI Agent to Human Agent: ElevenLabs Call Handoffs with Twilio

Twilio’s reference blueprint demonstrates how an ElevenLabs conversational voice agent can handle customer calls while Twilio retains ownership of the live call, enabling reliable escalation to human agents when issues become complex, sensitive, or unresolved. The integration passes the original Twilio parent Call SID to ElevenLabs as a dynamic variable, allowing the AI agent’s escalation webhook to instruct Twilio to update that same call with new TwiML routing, such as enqueuing it into Flex through TaskRouter. It supports three main routing approaches: a Studio-managed journey, a direct TaskRouter/Flex handoff, and custom destinations using TwiML instructions such as Dial, Conference, SIP, or Redirect. The pattern also works for outbound calls and WhatsApp Business Calling, and can optionally incorporate Twilio Conversation Memory, Orchestrator, and Conversation Intelligence to provide cross-channel customer context, summaries, sentiment analysis, and escalation signals. Presented as a proof-of-concept rather than a production-ready deployment, the accompanying repository provides Functions, agent prompts, webhook templates, Studio examples, and testing guidance while emphasizing that organizations must adapt security, compliance, authentication, observability, retention, and routing controls for their own environments.

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