blekko is described as 'search engine that fights spam, preserves your privacy, and uses "slashtags" to refine searches' and is an app in the Online Services category. There are more than 10 alternatives to blekko for a variety of platforms, including Online / Web-based, Android, iPhone, iPad and Android Tablet. The best alternative is DuckDuckGo, which is free. Other great apps like blekko are Google Search (Free), searx (Free, Open Source), Qwant (Free) and Wolfram Alpha (Freemium).
DuckDuckGo is an alternative search engine that has rich features, respects your privacy, and is built from free/open-source software. • Zero-click Info - Useful information above the links. • More Privacy - We do not track you.
Wolfram Alpha is a "Computational Knowledge Engine" - different from a search engine, it answers factual queries directly by computing the answer from structured data, rather than providing a list of documents or web pages that might contain the answer.
Ecosia is a green search engine that donates at least 80% of its profits from search ad revenue and online shopping to a reforestation program, currently in Burkina Faso. In November 2015 Ecosia celebrated 3 million planted trees and $5 Million donated for the environment.