Text-to-Speech API

Text-to-speech API with natural Indian-language voices

40+ natural voices across 10 Indian languages plus Indian English. Streaming output, $0.30 per 10K characters. Built for voice agents, audiobooks, IVR, and accessibility.

10 Indian languages × 40+ natural voices
Streaming output for live voice agents
Speed control, 6 audio formats
$0.30 / 10K chars — transparent pricing, no seat fees

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Audio studio with microphone for voice synthesis

10Indian languages

40+Natural voices

StreamingReal-time output

$0.30per 10K chars

How it works

From text to natural voice in 4 steps

Sample voices, pick one, ship to production.

Pick a voice

40+ Bulbul voices across 10 Indian languages plus Indian English — male and female. Sample them in-dashboard before deploying.

Send text

POST your text with a voice and language, or stream chunks. Control speed from 0.25x to 4x.

Receive audio

MP3, WAV, OPUS, AAC, FLAC, or raw PCM. Batch mode for files; streaming for real-time voice.

Reuse

The OpenAI-compatible audio.speech shape — one call returns the audio bytes, ready to play or store.

Features

Why teams building Indian products choose CallMissed TTS

Because Google's Hindi voices still sound like a call-center IVR. Ours don't.

10 Indian languages + 40+ voices

Hindi (Kavya, Anand, Priya and more), plus Bengali, Gujarati, Kannada, Malayalam, Marathi, Odia, Punjabi, Tamil, Telugu and Indian English. Male and female voices in every language.

Natural Indic prosody

Sarvam's Bulbul voices are tuned for Indian languages — intonation and rhythm that sound native, not a translated accent.

Streaming output

Stream audio bytes as they're synthesized — fast enough for live voice agents and interactive IVR, or fetch the whole clip in one batch call.

Speed control

Set playback speed from 0.25x to 4x per request. Pick the output format your pipeline needs: MP3, WAV, OPUS, AAC, FLAC, or raw PCM.

OpenAI-compatible shape

Call it with the audio.speech.create pattern from the OpenAI SDK — one endpoint, a voice, a language, your text. No new client to learn.

India data residency

Text and audio are processed in our India region (Azure Central India). DPDP Act-aligned, tenant-isolated per API key.

Use Cases

Text-to-speech use cases

Voice agents, audiobooks, IVR, accessibility, navigation — same API.

Voice AI agents

Natural voice for your phone bot

Pair our TTS with the Voice Agent API for a full voice pipeline. Streaming output means callers hear the reply as it's synthesized, not after an awkward gap.

Result

Voice agents that customers don't hang up on.

Audiobooks + e-learning

Indian-language audiobooks at scale

Convert educational content, books, articles into natural-sounding audio across 10 Indian languages. Students consume lessons while commuting; learners without literacy get access via voice.

Result

Turn a whole library into audio at per-character API rates.

IVR + phone menus

Dynamic IVR prompts without re-recording

Change your IVR greetings, hold messages, or queue announcements in minutes — not weeks waiting for a studio session. Say 'Queue is longer than usual' in Tamil on-demand without re-recording audio files.

Result

Launch campaign greetings in an hour, not a week.

Accessibility

Read-aloud for low-literacy users

Government portals, banking apps, and health apps add a 'Listen' button that reads content in the user's chosen Indian language. Essential for low-literacy populations and visually impaired users.

Result

WCAG AA compliance + genuine accessibility for Bharat.

Navigation & in-app voice

Turn-by-turn directions in local languages

Mapping apps, delivery driver apps, cab aggregators — give turn-by-turn voice prompts in the driver's local language. Works offline when prompts are pre-generated and cached on device.

Result

Voice navigation across 10 Indian languages.

Marketing + announcements

Personalized voice notes at scale

Send hyper-personalized WhatsApp voice notes — 'Hi Rajesh, your order is out for delivery' — in the customer's language. Higher open rates than text, warmer than generic SMS.

Result

Warmer than SMS, in the customer's own language.

Compare

CallMissed TTS vs Google, AWS, ElevenLabs, Azure

On Indian languages we lead; on price we crush; on API ergonomics we're OpenAI-compatible.

Feature	CallMissed	Google TTS	AWS Polly	ElevenLabs	Azure TTS
Native Indian-language voices
Natural Indic prosody
Streaming output
Speed control
India data residency
OpenAI-compatible shape
Pricing per 10K chars	$0.30	$0.16	$0.16	$3.00	$0.16

Comparison based on publicly listed features as of 2026. Check each vendor's site for the latest.

Code

Shipping voice in 5 lines

python

from openai import OpenAI

client = OpenAI(
    base_url="https://api.callmissed.com/v1",
    api_key="cm_your_key",
)

audio = client.audio.speech.create(
    model="bulbul:v3",              # Sarvam — 37 voices, 11 Indian languages.
                                    # Also: "aura-2-en" (Deepgram English, 40 voices)
                                    # Also: "aura-2-es" (Deepgram Spanish, 10 voices)
                                    # Also: "melotts" (open-source en + fr, cheapest)
    voice="ritu",                   # Hindi female — or shubh, priya, rahul…
    input="नमस्ते, आपका ऑर्डर कल पहुँचेगा।",
    response_format="mp3",
)

audio.stream_to_file("greeting.mp3")

Python — synthesize Hindi voice, save as MP3

javascript

import { CallMissed } from "callmissed";
const cm = new CallMissed({ apiKey: process.env.CM_KEY });

const stream = cm.audio.tts.stream({
  model: "bulbul:v3",          // or "aura-2-en" / "aura-2-es" / "melotts"
  voice: "shubh",              // 37 Sarvam speakers; pick a Tamil one for ta-IN
  text: "உங்கள் ஆர்டர் நாளை வருகிறது",
  format: "opus",
  sampleRate: 24000,
});

// pipe to telephony / websocket / audio element
stream.on("data", (chunk) => speaker.write(chunk));

Node/JS — stream TTS audio for a live voice agent

FAQ

Text-to-speech API questions, answered

A text-to-speech (TTS) API converts written text into natural-sounding audio. You send a text string, a voice, and a language; it returns audio bytes (MP3/WAV/OPUS and more) you can play in an app, broadcast over the phone, or save as a file. CallMissed's TTS uses Sarvam's Bulbul voices, tuned for Indian languages, so Hindi, Tamil, Marathi etc. sound native — not a translated accent.

Try 40+ Indian voices free

Grab an API key, sample every voice in the dashboard, and ship natural-sounding audio today.

Get API key Read TTS docs