Which company created the Twemoji open-source emoji set?

Twitter created the Twemoji open-source emoji set.

Twemoji is a set of emoji artwork originally developed by Twitter for use across its services. The name combines “Twitter” with “emoji.” Twitter released the artwork and supporting resources under open-source licenses, allowing developers and other projects to use the designs under the applicable licensing terms.

Twemoji is not the Unicode Standard itself. Unicode defines characters, names, code points, and recommended sequences, while a platform or project supplies the visual font or images. This distinction explains why the same emoji can look different on Twitter, Apple, Google, Microsoft, and other systems even though the underlying encoded character is the same.

Twitter’s artwork has also been used outside Twitter in websites, applications, and operating systems. Availability and licensing details can change as projects evolve, so users should check the current project documentation when redistributing the assets.