Eric Sauvageau is the developer behind the brand Asuswrt-Merlin, offering custom firmware for Asus routers. Asuswrt-Merlin is an alternative version of the firmware developed by Asus, focused on enhancing the existing firmware without making major changes. Eric Sauvageau aims to fix known issues and limitations while maintaining the original firmware's performance.

This means that Asuswrt-Merlin retains full support for features like NAT acceleration, enhanced NTFS performance, and exclusive Asus features such as AiCloud and AiProtection. The project's priority is not adding new features but rather improving the existing firmware. Asuswrt-Merlin is supported by a wide range of router models, including RT-AC68U, RT-AX88U, and GT-AX11000.

Additionally, Asuswrt-Merlin has an ecosystem of third-party developed addons that can enhance routers with features like ad blocking and connection monitoring