The Open SourceTwilio Alternative

Engage with your customer with voice or messaging with
a single easy-to-use platform.

Veteran Owned and Operated

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Build voice applications for your business, today.

Applications

Voice Applications are first-class citizens with supports for verbs like Play, Say, Gather, etc.
Released
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Authentication

Keep your business safe with project-level authentication based in OAuth2 and JWT tokens.
Released
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Storage

Store, organize, and serve your sounds on S3 buckets and use them later for analysis.
Released
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Functions

Run small pieces of logic in a secure and isolated environment without deploying servers.
Experimental
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Join the community

Supported by a growing community of advocates, contributors, and heroes.

The SDKs and Tooling to help you build your apps faster.

Create a smart voice applications that meets your business needs without the clutter of unneeded features or historically burdensome customizations.

Install from NPM or CDN

Use the SDKs in the Browser or NodeJS application

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CLI

Use the command-line tool to rapidly create and deploy your applications

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1const { VoiceServer } = require("@fonoster/voice");
2const serverConfig = {
3  pathToFiles: `${process.cwd()}/sounds`,
4};
5
6new VoiceServer(serverConfig).listen(
7  async (req, res) => {
8    console.log(req);
9    await res.answer();
10    await res.play(`sound:${req.selfEndpoint}/sounds/hello-world.sln16`);
11    await res.hangup();
12  }
13);
14
15// your app will leave at http://127.0.0.1:3000/
16// and you can easily publish it to the Internet with:
17// ngrok http 3000
18  
1const Fonoster = require("@fonoster/sdk")
2const callManager = new Fonoster.CallManager()
3
4// Replace the webhook with the one from your Ngrok
5callManager.call({
6  from: "9842753574",
7  to: "17853178070",
8  webhook: "https://5a2d2ea5d84d.ngrok.io"
9})
10  .then(console.log)
11  .catch(console.error)
12    

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Try us out to start building for free.