不過有1點可以絕對和古狗比，就是Private Searching

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Popularity is useful, but not always important
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Effective Date: July 27, 2008

Privacy is a hot topic these days, and we want you to feel totally comfortable using our service, so our privacy policy is very simple: when you search with Cuil, we do not collect any personally identifiable information, period. We have no idea who sends queries: not by name, not by IP address, and not by cookies (more on this later). Your search history is your business, not ours.

More precisely:
Logs

We do not keep logs of our users’ search activity.
Cookies

Cookies are small files on your computer that websites create to store user preferences, such as language settings. Each time you visit a Cuil page, your computer’s cookies automatically provide Cuil with your preferences. You can change or delete your cookies anytime via your Web browser options.