| Media Metrix Top 50 U.S. Web Sites | Netcraft “What's That Site Running?” |
| 9/1/99 through 9/30/99 | 10/26/99 |
| Combined At Home and At Work |
| Rank | Web Sites | Unique Visitors | Server | Host |
| Total World | 63,374 | |||
| 1 | Yahoo.com | 32,131 | Unknown | FreeBSD |
| 2 | Aol.com | 28,440 | NaviServer/2.0 | Solaris |
| AOLserver/2.3.3 | ||||
| 3 | Msn.com | 28,186 | Microsoft-IIS/4.0 | NT3 or |
| Windows 95 | ||||
| 4 | Netscape.com | 19,623 | Netscape-Enterprise/3.6 | Solaris |
| 5 | Microsoft.com | 19,602 | Microsoft-IIS/4.0 | NT3 or |
| Windows 95 | ||||
| 6 | Geocities.com | 19,345 | Unknown | Solaris |
| 7 | Go.com | 18,889 | Unknown | Solaris |
| 8 | Excite.com | 14,085 | Netscape-Enterprise/2.01 | Solaris |
| 9 | Hotmail.com | 13,648 | Apache/1.3.6 (Unix) | FreeBSD |
| mod_ssl/2.2.8 SSLeay/0.9.0b | ||||
| 10 | Lycos.com | 13,439 | Netscape-Enterprise/3.6 SP2 | Digital UNIX |
| 11 | Passport.com | 13,006 | Microsoft-IIS/4.0 | NT3 |
| Windows 95 | ||||
| 12 | Amazon.com | 11,283 | Netscape-Commerce/1.12 | Digital UNIX |
| 13 | Angelfire.com | 11,075 | Apache/1.3.4 | Linux |
| 14 | Tripod.com | 10,315 | Apache/1.3.4 | Solaris |
| 15 | Real.com | 10,138 | This.is.a.real...1.2alpha12 | Linux |
| 16 | eBay.com | 9,991 | Microsoft-IIS/4.0 | NT4 or |
| Windows 98 | ||||
| 17 | AltaVista Search | 9,453 | AV/1.0.1 | Digital UNIX |
| 18 | Bluemountainarts.com | 9,155 | Apache/1.3.4 | FreeBSD |
| 19 | About.com | 8,138 | Apache/1.3.4 | FreeBSD |
| 20 | Looksmart.com | 8,063 | Apache/1.3.4 | Solaris |
| 21 | Hotbot.com | 7,922 | Microsoft-IIS/4.0 | NT4 or |
| Windows 98 | ||||
| 22 | Snap.com Search | 7,661 | Netscape-Communications/1.12 | Solaris |
| 23 | Goto.com | 7,316 | Netscape-Enterprise/3.0K | Solaris |
| 24 | ZDNet | 7,308 | Netscape-Enterprise/3.6 SP2 | Solaris |
| 25 | Xoom.com | 7,077 | Apache/1.2.5 | FreeBSD |
