NaviSite is the most reliable hosting company site for April 2008.

NaviSite was incorporated in 1998 and provides application solutions and hosting services using its web infrastructure platforms in 18 data centers. The company recently announced an alliance with Intel Corporation to offer a suite of managed services through Intel's value added reseller community.

NaviSite's performance is followed by DataPipe, which made 11 appearances in the top ten last year. Last month's most reliable hosting company site, INetU, appears in third place this month.

Three of April's top ten hosting companies, including NaviSite, run Linux on their main sites, while another three use FreeBSD. One company uses Windows Server 2003.

Several SourceForge, Inc sites, including the popular technology news site Slashdot have been offline for several hours today.

All of Netcraft's globally distributed performance monitors have recorded a solid period of downtime at a number of sites hosted in the VA Software netblock. VA Software is the former name of SourceForge, Inc, which hosts all of the affected sites, including Slashdot, the source code repository SourceForge.net, software release site Freshmeat and merchandise supplier ThinkGeek.

Static uptime graph for www.slashdot.org

Netcraft's live monitoring of www.slashdot.org can be seen here, reflecting a contiguous outage of approximately 5 hours.

The CNN News website has twice been affected since an earlier distributed denial of service attack last Thursday. CNN fixed Thursday's attack by limiting the number of users who could access the site from specific geographical areas.

Subsequently, an attack was purportedly organised to start on Saturday 19th April, but cancelled. However, our performance monitoring graph shows CNN's website suffered downtime within a 3 hour period on Sunday morning, followed by other anomalous activity on Monday morning, where response times were greatly inflated.

Netcraft is continuing to monitor the CNN News website. Live uptime graphs can be viewed here.

INetU is the most reliable hosting company site for March 2008, closely followed by Express Technologies.

INetU is an enterprise managed hosting company located in Allentown, PA. They have been in business since 1996 and notably offer a 100% uptime service level guarantee. INetU's clients include Fortune 500 companies such as Microsoft, Intel, Northrop Grumman and Canon.

Express Technologies acquired Hosting.com in June 2004 and the Express Technologies website now points to their new home at Hosting.com. The company also partners with DreamHost to provide managed hosting, server colocation and virtual servers running on VMware ESX.

Three of March's top ten hosting companies run Windows Server 2003 on their main sites, while two use Linux and two use FreeBSD.