VoiceRouter SDK

One interface. Every speech-to-text API.

Fully typed in TypeScript. Swap providers without touching your code. Do real comparisons. Test fast, ship faster.

pnpm add voice-router-dev
example.tstypescript
import { createRouter } from "voice-router-dev";
const router = createRouter({
  provider: "gladia",
  apiKey: process.env.TRANSCRIPTION_API_KEY,
});
const transcript = await router.transcribe({
  audio: audioBuffer,
  language: "en",
});

GitHubMeeting-BaaS/sdk-generator

5

v0.7.2Get StartedDocumentation

Transcription Provider Agnostic

Any transcription service, same code

Plug in Gladia, Deepgram, Assembly AI, OpenAI Whisper, or any transcription provider. Compare accuracy, latency, and cost—switch with a config change.

Change Transcription Provider

Same code, any transcription service. Change one config value to switch between Gladia, Deepgram, Assembly AI, and more.

router.tstypescript
import { createRouter } from "voice-router-dev";
// Switch provider with one line
const router = createRouter({
  provider: "gladia", // or "deepgram", "assemblyai", etc.
  apiKey: process.env.TRANSCRIPTION_API_KEY,
});
// Same API, any provider
const transcript = await router.transcribe({
  audio: audioBuffer,
  language: "en",
});
Switch transcription providertypescript
// Switch transcription provider
const router = createRouter({
  provider: "assemblyai",  // Was: "gladia"
  apiKey: process.env.ASSEMBLYAI_API_KEY,
});
// Same interface, different provider
const transcript = await router.transcribe({
  audio: audioBuffer,
  options: {
    punctuate: true,
    diarize: true,
  },
});

Unified Webhook Handling

Handle transcription callbacks from any provider with one router. Normalized payloads, consistent event types.

webhooks.tstypescript
import { WebhookRouter } from "voice-router-dev";
const webhooks = new WebhookRouter();
// Handle transcription callbacks from any provider
webhooks.on("transcription.completed", (event) => {
  // Normalized payload—same structure regardless of provider
  console.log(event.transcript);
  console.log(event.provider); // "gladia" | "deepgram" | "assemblyai"
});
// In your API route
export async function POST(req: Request) {
  return webhooks.handle(req);
}

Supported Providers

One unified API for all major transcription services.

GladiaAssemblyAIDeepgramOpenAI WhisperSpeechmaticsAzure SpeechSoniox
I am a provider

Why VoiceRouter?

100% Open Source

Not a service—just an SDK. All code is public, auditable, and MIT licensed. You own your integration.

Always Up-to-Date

Auto-generated daily from provider OpenAPI specs. When providers update, so does the SDK.

Try Multiple Platforms

Evaluate providers side-by-side without rebuilding your integration each time.

Find Your Best Config

A/B test transcription services to optimize for quality, speed, or cost.

Instant Failover

Provider down? Switch to a backup in seconds—no code changes, no downtime for your users.

Unified Webhooks

Handle transcription callbacks from any provider with one router. Normalized payloads, consistent event types.

API Documentation

Transcription API

Unified interface for all transcription providers with streaming support

Webhook Router

Handle transcription callbacks from any provider with normalized payloads

Getting Started

Quick setup guide and API reference for the VoiceRouter SDK

See Also

Combine VoiceRouter with MeetingRouter for end-to-end meeting transcription.

MeetingRouter SDK

Provider-agnostic SDK for meeting recording bots. Combine with VoiceRouter for end-to-end meeting transcription.