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2600hz/kazoo

This system is a modular telephony and communications platform built on the Erlang VM, designed to manage voice, video, and messaging services. It provides core infrastructure for call control, media handling, and event routing, while offering specialized applications for call flow logic, conferencing, SMS routing, and push notifications. The architecture supports integration with external services for payments, fax, and authentication, enabling a comprehensive suite of unified communications features.

43.9

Weak · 6 August 2026

336k

lines of production code

Erlang

primary language

2

bus factor · 193 authors in all

3

measurements over time

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How it got here

2010–2014 · Kazoo application modularization

This period marks the comprehensive modularization of the Kazoo platform, where the codebase was restructured into distinct, independent applications such as CDR, ACDC, and Blackhole. The work involved establishing standard build systems, licensing, and dependency management for each component, while simultaneously removing legacy RabbitMQ client implementations to clean up the dependency tree.

57 changes

2015–2016 · Core library and application expansion

This period focused on expanding the codebase with numerous new core libraries and applications, including call inspection, push notifications, and task scheduling. The work established a standardized build system, centralized configuration management, and introduced modular components for authentication, caching, and media handling. Additionally, the project adopted the Mozilla Public License 2.0 across the repository.

81 changes

2017–2020 · Core infrastructure and eventing

This period focused on establishing a robust internal infrastructure, introducing the EDR eventing system and centralized event handling to decouple application logic. It also introduced foundational libraries for data conversion, number management, and testing utilities, while significantly expanding test coverage across the codebase.

67 changes

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About this page

  • The description of this project is derived from its own commit history, not from its README.
  • The score is its highest published measurement, taken on 6 August 2026 at a pinned commit. It is not a live figure and does not change until the project is measured again.
  • Measured at commit dcf86cbc6d — the exact code this score is about.
  • Scored under rubric rubric-2026.08.19. Score the same commit under that rubric and you get the same number.
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