Apache HTTP web server, with more than 60% of market shares, has a uncontested leader position. Competitors, as well free as owners, however exist. But it never put in danger the leading position of Apache.
Apache 1.0 was launch in December 1995. Less one year after,  Apache was the leader in the use of Internet.

Apache is since 1999 a non-profit institution (Apache Software Foundation).

•     - its public image : preserved and reinforced by the quality of the product (performance and safety)
•     - its strong modularity (encouragement of innovation and personalization).

But, if you prefer Popsiplan® can run under all sort of web server.