Voice agent API

Fast, natural voice agents for a fraction of the price.

Stream audio in, get a natural voice back in about a second. Echo cancellation, barge-in, tools and memory run on our side, billed per turn, so listening time is almost free.

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~1 s replies

Measured: about 0.9 s from end of turn to first agent audio (p50) on the fast profile, 1.2 s p95.

From $0.011/min

Pay per agent turn, not per minute. Idle listening costs $0.13 per hour.

Barge-in that works

Server-side echo cancellation fed with the exact audio the caller hears. Talk over the agent and it stops.

Natural voices

Hundreds of voices and cloning, plus an expressive premium engine with laughs and sighs.

Tools and memory

Webhook, client and built-in tools; per-customer conversations and summaries with your retention settings.

Built for bad networks

Dropped connections resume where they left off, with no lost or repeated audio.

Live demo

A short call with a sample agent. Uses your microphone; nothing is recorded or stored.

Ready

Pricing

Model tierPer turn~Per minute
S (fastest, default)$0.0030~$0.011
M$0.0045~$0.016
L$0.0065~$0.023
Premium voice add-on+$0.0040+$0.014

Each turn includes 6,000 prompt tokens, 400 output tokens, 400 speech characters and 45 s of connected time. Small surcharges apply only beyond that, and every turn reports its usage. Prepaid credits, no minimums.

Calculator

Per turn-
Per minute-
Ciabatta per month-
At $0.10/min-
You save-

Estimate at 3.5 turns per minute. Competitor figure is the low end of typical all-in per-minute pricing.

How it compares

PlatformTypical all-in priceBilling
Ciabatta$0.011-0.037/minPer turn; idle listening $0.13/h
Vapi$0.10-0.30/minPer minute + providers
Retell AI$0.10-0.20/minPer minute
ElevenLabs Agents~$0.08-0.10/minPer minute, plan-bound
Bland~$0.09/minPer minute
OpenAI Realtime~$0.10-0.30/minPer audio token

Competitor prices are approximate public list prices as of October 2026 and vary by plan and provider choice.

Ship in minutes

npm install @getciabatta/sdk

import { Ciabatta } from "@getciabatta/sdk";
const ciabatta = new Ciabatta({ apiKey: process.env.CIABATTA_API_KEY });
const session = await ciabatta.sessions.create("support", { customer_id: "cust_123" });
// hand session.ws_url + session.token to your web or mobile app

Quickstart - SDKs and Twilio - Deployment profiles