Hi,
sorry for the delay in replying.
This is the info i got from the readme file of VisualSVN Server
VisualSVN Server is a package that contains everything you need to install,
configure and manage Subversion server for your team on Windows platform. It
includes Subversion, Apache and a management console.
This distribution contains the following components:
- Subversion 1.4.6
- Apache 2.2.8
- OpenSSL 0.9.8g
- ZLib 1.2.3
- Neon 0.27.2
i suppose that answers your question. its apache.
Thanks
Jish