IA (Japanese: イア) is a humanoid persona voiced by a singing synthesizer application developed by 1st Place Co., Ltd., headquartered in Meguro, Tokyo, Japan.

She was illustrated by Aka Akasaka, the author of Kaguya-sama: Love Is War and Oshi no Ko.

She was the first release for the "Aria on the Planetes" project, of which the CeVIO Creative Studio vocal also made by 1st Place, named "One", is also a part of.

[2] The design philosophy 1st Place worked toward was to make the voice simple and straightforward but easy to adjust and customize, letting creators create their own version of IA.

[3] In 2014 a prototype vocal called "IA -Aria On the Planetes- α Type C" was released as a free trial version via a one-month long feedback campaign.