WebCrawler is a search engine, and one of the oldest surviving search engines on the web today. For many years, it operated as a metasearch engine. WebCrawler was the first web search engine to provide full text search.
robots.txt is the filename used for implementing the Robots Exclusion Protocol, a standard used by websites to indicate to visiting web crawlers and other web robots which portions of the website they are allowed to visit.
Excite is an American web portal operated by IAC that provides a variety of outsourced content including news and weather, a metasearch engine, and a user homepage. In the United States, the main Excite homepage had long been a personal start page called My Excite. Excite once operated a webmail service commonly known as Excite Mail until August 31, 2021.
Dogpile is a metasearch engine for information on the World Wide Web that fetches results from Google, Yahoo!, Yandex, Bing, and other popular search engines, including those from audio and video content providers such as Yahoo!.
A metasearch engine is an online information retrieval tool that uses the data of a web search engine to produce its own results. Metasearch engines take input from a user and immediately query search engines for results. Sufficient data is gathered, ranked, and presented to the users.
Yippy was a metasearch engine that grouped searched results into clusters. It was originally developed and released by Vivísimo in 2004 under the name Clusty, before Vivisimo was later acquired by IBM and Yippy was sold in 2010 to a company now called Yippy, Inc. At the time, the website received 100,000 unique visitors a month.
Yahoo! Search is a Yahoo! internet search provider that uses Microsoft's Bing search engine to power results, since 2009, apart from four years with Google from 2015 until the end of 2018.
Yandex LLC is a Russian multinational technology company providing Internet-related products and services, including an Internet search engine called Yandex Search, launched in 1997, information services, e-commerce, transportation, maps and navigation, mobile applications, and online advertising. Yandex Holding Company was incorporated in 2000. As of 2016, it primarily served audiences in Russia, Kazakhstan, Belarus, Turkey and countries with significant Russian-speaking population.
A search engine is a software system that finds web pages that match a web search. They search the World Wide Web in a systematic way for particular information specified in a textual web search query. The search results are generally presented in a line of results, often referred to as search engine results pages (SERPs). The information may be a mix of hyperlinks to web pages, images, videos, infographics, articles, and other types of files. Some search engines also mine data available in databases or open directories. Unlike web directories and social bookmarking sites, which are maintained by human editors, search engines also maintain real-time information by running an algorithm on a web crawler. Any internet-based content that cannot be indexed and searched by a web search engine falls under the category of deep web.
Microsoft Bing, commonly referred to as Bing, is a web search engine owned and operated by Microsoft. The service traces its roots back to Microsoft's earlier search engines, including MSN Search, Windows Live Search, and later Live Search. Bing offers a wide range of search services, encompassing web, video, image, and map search products. The platform is built using ASP.NET, a framework developed by Microsoft for building modern web applications.
PolyCola, previously known as GahooYoogle, is a metasearch engine which was created by Arbel Hakopian.
LeapFish.com was a search aggregator that retrieved results from other portals and search engines, including Google, Bing and Yahoo!, and also search engines of blogs, videos etc. It was a registered trademark of Dotnext Inc, launched on 3 November 2008.
DuckDuckGo (DDG) is an internet privacy company. DuckDuckGo offers a number of products oriented towards helping people protect their privacy online, most notably, a private search engine, a tracker-blocking browser extension, email protection and app tracking protection.
MetaCrawler is a search engine. It is a registered trademark of InfoSpace and was created by Erik Selberg.
Yandex Search is a search engine. It is owned by Yandex, based in Russia. In January 2015, Yandex Search generated 51.2% of all of the search traffic in Russia according to LiveInternet.
Schema.org is a reference website that publishes documentation and guidelines for using structured data mark-up on web-pages. Its main objective is to standardize HTML tags to be used by webmasters for creating rich results about a certain topic of interest. It is a part of the semantic web project, which aims to make document mark-up codes more readable and meaningful to both humans and machines.
Web search engines are listed in tables below for comparison purposes. The first table lists the company behind the engine, volume and ad support and identifies the nature of the software being used as free software or proprietary software. The second and third table lists internet privacy aspects along with other technical parameters, such as whether the engine provides personalization.
Searx is a free and open-source metasearch engine, available under the GNU Affero General Public License version 3, with the aim of protecting the privacy of its users. To this end, Searx does not share users' IP addresses or search history with the search engines from which it gathers results. Tracking cookies served by the search engines are blocked, preventing user-profiling-based results modification. By default, Searx queries are submitted via HTTP POST, to prevent users' query keywords from appearing in webserver logs. Searx was inspired by the Seeks project, though it does not implement Seeks' peer-to-peer user-sourced results ranking.
Zoo.com is a metasearch engine, which as of 2006, provided results from search engines and other sources, including Google, Yahoo! and Wikipedia. Also as of 2006, Zoo.com provided news content from ABC News, Fox News and Yahoo! News.
