Zeach (Matheus Valadares) was the original developer of Agar.io. Valadares is Brazilian. He is a biologist. He initiated the development of Agar.io after he had created a game called Voar.io. Later he sold Agar.io to Miniclip, who previously had developed the mobile app for the game.
- Zeach's reddit: https://www.reddit.com/user/Zeach