StartPage vs Siik

Unlike Google, Startpage does not record user IP addresses and strips away any uniquely identifying user information before sending the search request to Google. For each search result, Startpage also provides users with the option of viewing them via Ixquick's proxy services known as Ixquick Proxy.

The optional proxy allows you to visit linked sites anonymously too. While in the protection of the StartPage proxy, the third-party sites and its advertisers cannot "see" you. Plus, the site cannot download malware onto your computer.

Your IP address, search query, what site you came from and what site you click on in the results, none of this is logged. That is, by the search engine operators themselves. Even Edward Snowden recommended StartPage for its no-logging privacy.

StartPage is based in The Netherlands, where privacy is protected by law, so it is not subject to the same mandates and laws which is one (BIG) less thing to worry about. They own and operate their own servers in colocated facilities both in the U.S. and internationally.

StartPage is owned by Surfboard Holding B.V., a privately held, independent Dutch company, run by Robert Beens, whose only activities are operating StartPage, Ixquick and StartMail. No 3rd party investors or venture capital behind it as far as I could find. StartPage (and Ixquick) generates income solely from advertising (Google Ads).

StartPage has been audited by a 3rd party; EuroPriSe. They look at the use of cookies (all kinds), logging, web hosting and content delivery networks, use of social plugins and much more. This certification is renewed every two years. Having a trusted and respected 3rd party verify your claims is a big plus.
See here.

A referrer is an HTTP header field that identifies the address of the webpage (i.e. the URI or IRI) that linked to the resource being requested. By checking the referrer, the new webpage can see where the request originated.” Basically it tells a website where you came from. Startpage does not give this out.

Startpage is a hybrid search engine combining results from Ixquick and Google.

It has a very cool news section.

It's not a metasearch engine.

It shows up entities and descriptions from Wikipedia.