What is the best unfiltered search-engine, one to search them all?

First off, it's important to know that only 4 companies have multi-billion webpage crawls and indexes (of the English-language web.) No matter what engine you think you're using, most of the results you see are coming from google, bing, yandex, or blekko. Startpage is 100% powered by google, for example. Ixquick is a combination of several of these indexes. Next, what's best for you really depends on the searches that you do. If you're cutting-and-pasting long error messages into a search box, Google's index is likely to give the best results. If  you see a lot of spam in your Google results, which is common for ecommerce or medical queries, blekko's human curation can really clean those results up.

Google is still the best search engine, and if you want to depersonalize your search results you can perhaps try a "Vanilla Google" add-on or browse in incognito mode. Both of these options can ensure that your previously read links aren't bumped to the top. Before (normal browsing): After (incognito mode on):

Hmmm...seems like a similar question about a ring got a little guy in a lot of trouble. You could create a Google custom search engine or your own search engine that will aggregate all of those resources into a single entity, that being Google. The searches will be passed through and Google will assemble them in a single source. I would hope that it would strip out the duplicates and one can never be sure. If a single, federate search, is not what you intended then the answers below are all spot-on in pointing out: No search engine will ever completely index the Web due to its vast and mercurial nature. Google comes the closest because they are excellent engineers, are using lots of cheap hardware and software to power their index and use a form of incremental indexing and flash memory (for lack of a better term) to retain the most recent crawls in at the forefront of the index before sending the data into the vast maw of BigTable. The largest index should not matter much because all of the major search engines crawl the same content and present deeply similar results for most queries. The sort order may be different but the actual results are shared across most search properties. All search engines have an agenda and some are more 'pure' than others. I start with Duck Duck Go because I want them to succeed and search engines learn from our use and interaction. I then go to Bing  for the same reasons and sometimes, not often, end up a Google. Hope that this helps. Now, back to the Shire for me... m

I always use Google. The trick seems to be the question. I don't know why but this works well for me; pretend you are sitting at a Unix terminal, you are unfamiliar with a command. So you type man nmap, or man less or whatever. Works pretty much the same way with http://Google.Info info works too, just not as well. When writing a Google query think of the game show Jeopardy. Write your query as a Jeopardy answer. Alex, I'll take programming for $10.00. Answer(well you don't know) but your question would framed liked this, what new features are included in C#. And my results looked to be on the mark.

Try giving http://duckduckgo.com a try. It is a good way to not only "un-personalize" your results from Google, but also to join results from Bing and Yahoo (and probably other search engines as well). Although I agree with Max that straight google tends to be better at finding exactly what I want on the first try.