cFosSpeed 9.64 Build 2144 / 9.65 Build 2158 Beta

Optimize the speed of your Internet connection
cFosSpeed is one great application on the surface, optimizing and prioritizing your Internet connections in order to get the best out of your subscription.

Being one of the top picks in its Softpedia category, this program may not be your typical all-bragging no-brainier software that promises to provide astronomical Internet speeds no matter your connection type.

First things first – cFosSpeed provides a new management system for every Internet connection that your computer establishes regardless of its downloading or uploading state. As long as your connection is made through a DSL, cable or mobile broadband modem, WiFi or LAN, then this program will take charge of its management.

The software comprises many intelligent features that keep your Internet at speed even-though you already have started generating heavy traffic over the line, enhance the ping latencies for the gamer in you and also cut down issues regarding audio / video streaming.

The technology behind these benefits relies on the `Traffic Shaping` that adds a RWIN expansion to the standard Windows RCP Auto-Tuning and the `Prioritization` which automatically sets certain applications such as Web browsers, games or VoIP to higher priority than both ordinary or file sharing download and upload operations.

cFosSpeed also allows you to manage the priorities of each and every Internet connection putting you in complete control over the importance of simultaneously running processes. The main goal of the application is delivering the maximum possible speed while keeping the ping to minimal values.

The interface of the program displays a chart containing several connections such as Web, Up/download, Mail, Fileshare/P2P, Streaming, VoIP, Interactive or Receive / Send total. It comes in many sizes and styles as you can easily select one of them from the contextual menu. Logitech gaming keyboard are also supported by the application.

The Traffic Shaping menu provides a set of options like `Favor bandwidth`, `Calibrate line` or `Send test pings`, while the Settings window packs Automatic RWIN expansion functions as well as Protocols, Programs, Adapter Info, Online Budgets and Traffic Analysis.

Bottom line is that cFosSpeed is, indeed, a very well-polished application that, given time, grows on you. Once you get the hang of it, you enter a new territory which you are totally in control of any aspect regarding the speed of your Internet connection and the qualitative experience it brings to the high-priority customizable list of programs.

Reviewed by , last updated on November 15th, 2014

file size:
5 MB
developed by:
cFos Software GmbH
license type:
operating system(s):
Windows XP / Vista / Vista 64 bit / 7 / 7 64 bit / 8 / 8 64 bit / 2003 / 2008
C: \ Network Tools \ Bandwidth Tools
download hub:
Bandwidth Managers ( + 1 other )

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What's New in version 9.65 Build 2158 Beta
  • cFosSpeed now uses another API to get information about routing interfaces. You may need to configure your Traffic Shaping settings in the Options -> Settings -> Preferences Traffic Shaping settings.
  • You can now disable UPnP router detection by setting the key detect_igd=0 in file c:\programdata\cfos\cfosspeed\global.ini, section [param].
  • Fixed an spd.exe service crash in the UPnP device detection. This should also fix the problem with non-functioning current connections dialog.
  • Expiration pop-ups came up with every start. Fixed.
read full changelog

Application description

cFosSpeed is a feature-packed application for Internet acceleration, traffic shaping and bandwidth management. It also...

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