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. The second table lists privacy aspects along with other technical parameters, such as whether the engine provides personalization (alternatively viewed as a filter bubble).

Defunct or acquired search engines are not listed here.

Search results

Search engine Company Launched Software distribution license Pages indexed Daily direct queries Results count Advertisements
Ask.com IAC 1996 Proprietary Unknown Unknown Yes Yes
Baidu Baidu 2000 Proprietary Unknown Unknown Yes Yes
Bing Microsoft 1998/2009 Proprietary 13.5 billion[1] Unknown Yes Yes
DuckDuckGo DuckDuckGo 2009 Mixed[2] Unknown 21 million[3] No Optional
Gigablast Independent 2000 Free 1 billion[4] Unknown Yes No
Google Search Alphabet Inc 1998 Proprietary 40 billion[1] 9.022 billion[5] Yes Yes
YaCy Independent,
2005 Free 1.4 billion[6] 0.13 million [6] Yes No
Yahoo! Search Yahoo! 1995 Proprietary 10 billion[1] Unknown Yes Yes
Yandex Search Yandex 1997 Proprietary >2 billion[7] Unknown Yes Yes

Digital rights

Search engine Server's location(s) Dedicated servers Data center Cloud computing HTTPS available Tor gateway available Proxy gateway search links available Internet censorship (countries)
Baidu China No No Unknown China
Bing USA/China Yes Yes(SSL blocked in China) No Unknown China
DuckDuckGo[8] USA No Verizon Internet Services Amazon EC2 Yes Yes [9] No No[10]
Gigablast USA Yes[11] Yes[11] No Unknown
Google Search USA Yes Default if signed in[12] No Unknown Argentina,[13]
Yahoo! Search USA Partial Yes[14] No Unknown Argentina[13]
Yandex Search Russia Yes Yes[15] No Unknown Unknown

Tracking and surveillance

Search engine HTTP tracking cookies Personalized results[a][b] IP address tracking[c][b] Information sharing[b][clarification needed] Warrantless wiretapping of unencrypted backend traffic[b]
Baidu Yes Unknown Unknown Unknown Unknown
Bing Unknown Unknown Yes[16] Yes[16] 2014 and prior[16][17][18]
DuckDuckGo[8][19] No No No No No[citation needed]
Gigablast Unknown No No[11] No[11] No[11]
Google Search Unknown Default[20] Yes[16] Yes[16] 2013 and prior[16][21]
Yahoo! Search Unknown Unknown Yes[16] Yes[16] 2014 and prior[16][22]
Yandex Search Unknown Yes[23] Unknown Limited[24] Unknown
  1. ^ The results of the search are arranged for the user in accordance to their interests as determined from previous search queries or other information available to the search engine.
  2. ^ a b c d Cannot be verified independently, as the information is handled by servers not accessible by the public.
  3. ^ Tracking the user has to be conducted in order to provide personalized search results.

See also


  1. ^ a b c "Size Google, Bing, Yahoo search (number of web pages)". Retrieved March 23, 2013. 
  2. ^ "Open Source Overview". DuckDuckGo Community Platform. Retrieved 6 June 2014. 
  3. ^ "DuckDuckGo Direct queries per day (28d avg)". Retrieved 3 May 2017. 
  4. ^ "about". gigablast.com. Retrieved 2018-02-12. 
  5. ^ "Google Annual Search Statistics". Retrieved 3 May 2017. 
  6. ^ a b "YaCy - The Peer to Peer Search Engine: Home". Retrieved 1 April 2017. 
  7. ^ "SEC Filing 2011" (PDF). Form 20-F. "Our search index includes billions of webpages..": Yandex N.V. 31 December 2011. p. 45. Retrieved 21 April 2012. 
  8. ^ a b Holwerda, Thom (June 21, 2011), "DuckDuckGo: The Privacy-centric Alternative to Google", OSNews, retrieved March 30, 2012 
  9. ^ Weinberg, Gabriel (2010-08-10). "DuckDuckGo now operates a Tor exit enclave". gabrielweinberg.com. Retrieved 2014-07-01. 
  10. ^ "Don't Bubble Us". Retrieved April 3, 2012. 
  11. ^ a b c d e "Gigablast - The Private Search Engine". 2013. Retrieved 2017-04-29. 
  12. ^ "Google Makes HTTPS Encryption Default for Search". eWeek. Retrieved 2014-03-31. 
  13. ^ a b "Yahoo & Google Forced To Censor Search Results in Argentina". Seroundtable. Retrieved 2014-03-31. 
  14. ^ Danny Sullivan (22 January 2014). "Yahoo Search Goes Secure". Search Engine Land. Retrieved 31 March 2014. 
  15. ^ "Yandex.Direct switches to HTTPS". Yandex. Retrieved 31 March 2014. 
  16. ^ a b c d e f g h i Johnson, Kevin; Martin, Scott; O'Donnell, Jayne; Winter, Michael (June 15, 2013). "Reports: NSA Siphons Data from 9 Major Net Firms". USA Today. Retrieved June 6, 2013. 
  17. ^ Danny Yadron (2013-12-05). "Microsoft Compares NSA to 'Advanced Persistent Threat' - Digits - WSJ". Blogs.wsj.com. Retrieved 2014-01-15. 
  18. ^ Tom Warren (2013-12-05). "Microsoft labels US government a 'persistent threat' in plan to cut off NSA spying". The Verge. Retrieved 2017-04-29. 
  19. ^ "DuckDuckGo Privacy". 2012-04-11. Retrieved 2017-04-29. 
  20. ^ "Turn off search history personalization". Retrieved July 11, 2013. 
  21. ^ Gallagher, Sean (2013-11-06). "Googlers say "F*** you" to NSA, company encrypts internal network". Ars Technica. Retrieved 2017-04-29. 
  22. ^ Brandom, Russell (2013-11-18). "Yahoo plans to encrypt all internal data by early 2014 to keep the NSA out". The Verge. Retrieved 2017-04-29. 
  23. ^ "Компания Яндекс — Персональный поиск". Retrieved May 22, 2013. 
  24. ^ "Privacy Policy – Legal Documents". Yandex.Company. 3.3.1.: LLC Yandex. 15 November 2011. Retrieved 21 April 2012.