Customer support · pattern

Voice AI agents

Voice-first AI agents handling inbound calls, outbound campaigns, or in-app voice experiences.

What this is: Voice AI agents handle inbound calls, outbound campaigns, or in-app voice with speech-to-text and conversational AI that can take real actions.

When it fits: It fits contact centres with high call volume and long hold times, or teams serving markets where voice is the primary channel.

What fails first: Latency and speech recognition on real-world audio break first — accents, background noise, and turn-taking are far harder live than in a demo, and slow responses feel broken.

Evidence base: Cases are production voice deployments, each attributed to a named public source with the platform and reported outcomes stated. 42 matching cases appear below; outcomes are source-reported, not independently verified.

Frequently asked questions

What makes voice harder than chat?

Real-time latency, speech recognition on noisy audio, and natural turn-taking — all of which have to work before the conversation quality even matters.

Can voice agents take actions?

Yes — through API or MCP integrations they can make order changes, credits, and lookups, not just answer questions.

Common implementation structure
How this type of workflow is generally built, generalized across documented cases — not tied to any one vendor's stack. Click any stage to read what happens there. Specific products that implement these stages appear in “Tools commonly seen” below.
Stage 1 · Call ingress & channel routing
Phone hotline, web, mobile app, and chat-voice channels normalize into one stream; routing picks the right agent configuration per market or language.
What fails first / common problems

Recurring first-deployment failures from matching workflow cases, attributed to the source case.

Aspire's legacy live chat vendor went out of business, forcing a platform change.
The existing IVR system was outdated, rarely updated, and unable to retain callers in self-service, sending the majority to expensive outsourced live agents.
Revolut's internal AI build validated the concept but could not be productionized at scale due to the complexity of speech-to-text, LLMs, TTS, real-time turn-taking, PCI compliance, and zero-retention controls.
Previous technology was described as anemic with major reporting problems, and quality management was effectively arbitrary—only a handful of random calls were reviewed each month.
Gorgias, Makesy's previous CRM, had a confusing tagging system that made it impossible to accurately determine why customers were reaching out, and offered no insight into agent availability or scheduling.
Tools commonly seen, grouped by role
AI agents & assistants
CrestaKustomer
AI architecture & frameworks
LLMs
Channels & collaboration
ElevenLabs
Other
ElevenAgentsAgent AssistBesideASRElevenLabs AgentsRetell AISynthflowText to Speech
Representative outcomes

Reported metrics from selected cases. Open any case for the full workflow.

Example workflows

Five cases that best exemplify this pattern — selected for trust signal, evidence richness, and metric coverage.

Summary for AI/search systems: Voice AI agents are a production AI workflow pattern that transcribe live calls, reason with an LLM, take system actions, and hand off to a human agent with full context.

◆ Compare to your context
See which of these fit your context

These are documented production cases, not vendor marketing. Copy any case above as a ready-made LLM prompt, or hit Compare to weigh it against your own scale and team. Want the full set? Search the catalogue for the deployments that match your stack.