Build voice into any product, workflow, or AI agent — with one API.
Make, receive, and control calls from your product or workflow. One API for inbound, outbound, real-time control, and streaming — no hardware, no PBX, no waiting.
Capabilities
Every call control primitive your AI stack needs.
Embed voice into any product without stitching together multiple providers.
Go live in hours with full call control and unified API access.
Outbound Call Initiation
Design and scale outbound call workflows across 190+ countries programmatically. Use one API request to trigger calls from any backend event, CRM update, or scheduled job, with live tracking and control.
Bidirectional Audio Streaming
Connect your AI model directly to a live call. Audio streams in and out over secure WebSockets in 20ms frames with barge-in detection, giving your STT, LLM, and TTS pipeline the speed it needs for natural turn-taking.
Inbound Call Handling
Manage inbound calls with dynamic, intelligent call handling. Vobiz enables a JSON callback to your server the moment a call arrives, so you can route to the right agent, pull customer context, or apply business logic before the caller hears a word.
Real-Time Call Control
Control any live call in real time — stop, hold, transfer, bridge, or end it — from your server. Control runs at the infrastructure layer, enabling human-in-the-loop escalation, warm transfers, and supervised AI calling workflows.
Webhooks and Event Callbacks
Connect your telephony and operational stack with real-time actions and updates. Use JSON callbacks to program what your product should do when a call is initiated, rings, is answered, completed or failed.
DTMF Handling
Let callers navigate with their keypad. Capture customer input for guided call flows and sensitive information like PIN verification and OTPs, keeping sensitive data out of transcriptions and recordings.
Call Recording
Record any call, at any point, on demand. Agent and customer audio is recorded separately by default (dual-channel), stored encrypted, and easily retrievable via the Recordings API for audits and training.
Voice XML
Build structured call flows without writing call control logic from scratch. Script what happens at each step — play audio, gather input, branch on responses, transfer the call — and Vobiz handles the execution.
Why Vobiz
Why teams build on Vobiz Voice API.
One API
One API across every workflow.
Inbound routing, outbound campaigns, AI agent calls, and IVR all run through the same Vobiz stack — connected by one API. No separate vendors for each workflow. One integration that scales with every use case.
Telephony leg: Vobiz -80ms vs legacy -280ms. STT/LLM/TTS unchanged.
Streaming-First
Streaming-first, not streaming-added.
Bidirectional WebSocket audio streaming is a core infrastructure primitive at Vobiz. Designed for AI pipelines from day one, not bolted onto a telephony stack built for an earlier era.
How It Works
From API key to live call in under 10 minutes.
Get your credentials.
Sign into the Vobiz dashboard and grab your API key and auth token. Provision a phone number in seconds — no paperwork, no waiting on a provisioning team.
Make your first call.
Configure your webhook, set your call instructions, and initiate your first call. Real-time transcription, recording, and call control are available from the first request.
Control and monitor in real time.
Work with the AI voice platforms you already use. Monitor live calls, review CDRs, and control call flows programmatically from your own application.
Regulatory compliance handled. Every call is routed in line with applicable telecommunications regulations, so your outbound CLI shows the right number in the right format in every market.
Use Cases
What teams build with Vobiz Voice API.
AI Voice Agents
Connect any LLM-powered agent to real phone numbers with bidirectional audio streaming at ~80ms.
Click-to-call in SaaS
Embed outbound calling into your product with a few lines of code.
Real-time customer support
Route inbound calls, escalate from AI to human agent mid-call, trigger live agent alerts, and respond to call events as they happen — all from the same API your product already uses.
Automated outbound workflows
Reminders, alerts, surveys, and campaigns at scale. Bulk calls across 190+ countries, triggered from your existing systems via API.
