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Fonoster

Fonoster is the open-source alternative to Twilio, offering an easy-to-use platform for engaging with customers via voice and messaging. It provides developers with the tools needed to build, deploy, and secure voice applications quickly and efficiently.

Fonoster is the open source alternative to:
Fonoster screenshot

About Fonoster

Fonoster empowers developers to create versatile voice applications with built-in support for voice commands such as Play, Say, and Gather. The platform emphasizes secure project-level authentication using OAuth2 and JWT tokens, robust storage solutions, and comprehensive speech APIs. With SDKs for Browser and NodeJS, a command-line interface for rapid deployment, and active community support, Fonoster streamlines the process of building, testing, and deploying voice apps.

Key Features

  • Open-source alternative to Twilio
  • Built-in support for voice commands like Play, Say, and Gather
  • Secure authentication with OAuth2 and JWT tokens
  • Comprehensive SDKs and CLI tools for rapid deployment
  • Flexible storage and speech APIs integration
  • Robust community support and documentation

Pricing

Free
Free

A rate-limited plan ideal for prototyping and learning.

Features:
  • 1 Workspace
  • 1 Domain
  • 30 mins/mo
  • 1GB Storage
  • 1-week log retention
  • Community support
Pro
Pro

Perfect for small and medium businesses with production applications.

Features:
  • 10GB Storage
  • Unlimited Workspaces
  • Unlimited Domains
  • 520 mins/mo free then pay-as-you-go
  • 30-day log retention
  • Email support
Advanced
Advanced

Designed for the highest level of security, regulatory compliance, performance, and scalability.

Features:
  • Technical support with SLAs
  • Volume commitment pricing
  • Technical onboarding
  • Single Sign-On (Coming Soon)
  • Customer Success Manager

Summary

Fonoster delivers a robust, developer-friendly environment tailored for building comprehensive voice applications. Its suite of tools and flexible pricing plans, coupled with strong community backing, make it an attractive option for businesses seeking an open-source solution to Twilio.

Adrian
Created by
Adrian
Mar 9, 2025Updated1 min read
This content was partially generated using artificial intelligence.

Tool Details

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