What specific, technical and verifiable information exists to support StartPage’s claims about privacy? For example, they claim in the “Privacy” section of their iPhone app:
StartPage does not record any information about its users. Zero. Zilch. Nada.
[O]ur privacy practices are regularly audited and third-party certified.
I am skeptical because they essentially claim to serve up Google results anonymously. It seems surprising to me that Google would allow this, and even more surprising that StartPage asserts that
[Y]ou receive authentic Google results but you're never seen by Google[...]