WhatsApp has been developed from the early days using open source software. WhatsApp engineers use, contribute to and release a lot of open source software.

We contribute to key projects

Our engineers are eager to contribute back to the open source community.

Erlang is a programming language used to build massively scalable soft real-time systems with requirements on high availability.

FreeBSD is an advanced computer operating system used to power modern servers, desktops and embedded platforms.

jqGrid is an Ajax-enabled JavaScript control that provides solutions for representing and manipulating tabular data on the web.

libphonenumber is Google's common Java, C++ and Javascript library for parsing, formatting, storing and validating international phone numbers.

LightOpenId is a PHP 5 library for easy openid authentication.

lighttpd is an open-source web server optimized for high performance environments while remaining standards-compliant, secure and flexible.

PHP is a popular general-purpose scripting language that is especially suited to web development.

yaws is a HTTP high perfomance 1.1 webserver particularly well suited for dynamic-content web applications.