Abyss Web Server X1 is a lightweight, cross-platform web server. It is free and Open Source software released under the terms of the GNU General Public License.

Abyss Web Server X1 was initially developed by Aprelium Technologies for Windows and Linux operating systems, later adding support for Mac OSX. The server is designed to be lightweight and efficient, with a small footprint and low memory usage. It can be used for both static and dynamic websites.

Abyss Web Server X1 includes support for various programming languages, including PHP, Perl, Python, Ruby, and Tcl. It also includes support for virtual hosts, SSL, and streaming media.

Abyss Web Server X1 also supports:

HTTP/2 and secure SSL/TLS connections (HTTPS)

Support for Let's Encrypt certificates

On-the-fly HTTP compression

Dynamic content generation through CGI/FastCGI scripts

Native ASP.NET, HTTP/HTTPS/WebSocket reverse proxying, and eXtended Side Includes (XSSI),

Custom error pages

Anti-leeching

Bandwidth throttling

Log Rotation

Also included is a robust integrated and automated antihacking system and multilingual support.