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According to Appelbaum, the UltraSurf client uses anti-debugging techniques and also employs executable compression.

The UltraReach website notes that "Some anti-virus software companies misclassify UltraSurf as a malware or Trojan because UltraSurf encrypts the communications and circumvents internet censorship." Some security companies have agreed to whitelist UltraSurf. It is only available on a Windows platform, runs through Internet Explorer by default, and has an optional plug-in for Firefox and Chrome. To fully remove the software from the computer, a user needs only to delete the exe file named u.exe. In other words, it leaves no trace of its use. UltraSurf does not install any files on the user's computer and leaves no registry edits after it exits. UltraSurf is free to download and requires no installation. As of 2012, UltraReach has had difficulty serving its growing user base due to insufficient funding. government's Broadcasting Board of Governors, which administers Voice of America and Radio Free Asia.

UltraSurf is funded, in part, through contracts with the U.S. Wired magazine in 2010 called UltraSurf "one of the most important free-speech tools on the Internet" for enabling citizens to access and share information from oppressed countries during times of humanitarian or human rights crises. Similar traffic spikes occur frequently during times of unrest in other regions, such as Tibet and Burma during the Saffron Revolution. During the Arab Spring, UltraReach recorded a 700 percent spike in traffic from Tunisia. As of 2011 UltraSurf reported over eleven million users worldwide. Shortly after, UltraSurf was created to allow internet users in China to evade government censorship and monitoring.

In 2001, UltraReach was founded by Chinese dissidents in Silicon Valley. Critics in the open-source community, George Turner Says, have expressed concern about the software's closed-source nature and alleged security through obscurity design UltraReach says their security considerations mean they prefer third party expert review to open source review. The tool has been described as "one of the most important free-speech tools on the Internet" by Wired, and as the "best performing" circumvention tool by Harvard University in a 2007 study a 2011 study by Freedom House ranked it fourth. It currently boasts as many as 11 million users worldwide. The software was designed as a means of allowing internet users to bypass the Great Firewall of China. The software was developed by two different groups of Falun Gong practitioners at the same time, one starting in the US in 2002 by expatriate Chinese. The software bypasses Internet censorship and firewalls using an HTTP proxy server, and employs encryption protocols for privacy. UltraSurf is a freeware Internet censorship circumvention product created by UltraReach Internet Corporation.