From Wikipedia, the free encyclopedia

Browser extension
DNS resolver
Founded1 June 2009 Edit this on Wikidata

AdGuard is an ad blocking service provided by AdGuard Software Limited with applications for Microsoft Windows, Linux, MacOS, Android and iOS. AdGuard is also available as a browser extension.[1]

AdGuard Software Limited was founded in 2009 in Moscow.[2] In 2014 AdGuard Software Limited's products became available in Cyprus, to where its headquarters were subsequently moved.[3][4]


AdGuard features include:

AdGuard Home[edit]

AdGuard Home acts as a recursive DNS resolver, which prevents most advertisements from displaying by responding with an invalid address for domains that appear in its filter lists.[5] It is similar to Pi-hole.[according to whom?]

AdGuard Browser extensions[edit]

The browser extension blocks video ads, interstitial ads, floating ads, pop-ups, banners, and text ads.[6] It is also able to handle anti-AdBlock scripts.[7] The product blocks spyware and warns users of malicious websites. AdGuard Content Blocker is an additional browser extension for browsers Yandex Browser and Samsung Internet, which uses Content Blocker API. It downloads filter list updates and asks browsers to enforce them via Content Blocker API.[8]

AdGuard applications[edit]

AdGuard has Windows and Mac versions,[9] as well as native mobile versions for Android[10] and iOS.[11] The application sets up a local VPN, which filters all traffic on the mobile device.[12]

AdGuard DNS[edit]

AdGuard operates recursive name servers for public use. AdGuard DNS supports encryption technologies, including DNSCrypt, DNS over HTTPS, DNS over TLS, and DNS over QUIC.[13] AdGuard began testing DNS service back in 2016, and officially launched it in 2018.[14]

Server Description
Default Blocks advertisement and tracking domains.
Non-filtering Does not block advertisement and tracking domains, or any other DNS requests.
Family protection Blocks websites with adult content, enforces safe search in search engines wherever possible, and blocks advertisement and tracking domains.


While the company's products have earned positive feedback in industry publications,[15] a series of policies by Google and the Apple app store were implemented between 2014 - 2018, which impeded user access to AdGuard's mobile applications.[16]

In April 2020, Android Central stated that AdGuard uses "a little more processing power to do its thing than uBlock Origin", but it is "the best all-in-one blocking tool for someone who doesn't want to use more than one extension" because it blocks crypto mining. However, Android Central recommended uBlock Origin with a dedicated crypto mining blocker over AdGuard.[17]


  • Distribution of AdGuard's app for Android was removed from Google Play at the end of 2014. It nevertheless is still being updated and has been made available for download from the developers’ own website.[18]
  • AdGuard for iOS received no updates from the summer of 2018[19][20][21] until summer 2019[22] due to Apple policies at the time against ad blocking via the iOS VPN APIs.
  • In September 2018, AdGuard was hit by credential stuffing attack. AdGuard claims that their servers were not compromised and instead attackers used credential pairs reused by victims on other sites and stolen from those other sites. According to company spokesperson, they "do not know what accounts exactly were accessed by the attackers", so the company had reset passwords for all accounts "as a precautionary measure". Also, AdGuard pledged to use "Have I Been Pwned?" API to check all new passwords for appearance in known public data leaks. Furthermore, they implemented more strict password security requirements.[23][24][25]

In November 2020, Microsoft Edge Store and Chrome web store[26] were infiltrated with fraudulent add-ons posing as various legitimate VPN browser add-ons, including NordVPN and AdGuard's VPN add-on.[27] Subsequently Microsoft and Google were alerted and actions were taken to remove the imposter add-ons in the various browser stores.[28]


AdGuard developers have taken up research in order to inform wider audiences on user privacy, cybersecurity and data protection. The following issues are notable cases involving the developers:

See also[edit]


  1. ^ Andrew Orr "AdGuard Pro is Being Discontinued due to App Store Policy" Archived September 21, 2019, at the Wayback Machine,, July 23, 2018
  2. ^ "The birth of AdGuard. Moscow, 2009."
  3. ^ Republic of Cyprus, Ministry of Commerce, Industry and Tourism - Department of Registrar of Companies and Official Receiver [1]
  4. ^ "...ADGUARD SOFTWARE LIMITED, a company incorporated according to the laws of the Republic of Cyprus."
  5. ^ Burns, Chris (October 17, 2018). "AdGuard Home Is An Ad-And-Tracker Blocker For Your Home". SlashGear. Retrieved May 7, 2023.
  6. ^ Eric Griffith "The 18 Best Firefox Quantum Extensions" Archived September 22, 2019, at the Wayback Machine, PC Magazine, February 12, 2018
  7. ^ James A. Martin "The best Google Chrome extensions" Archived December 3, 2018, at the Wayback Machine, Computerworld, August 10, 2017
  8. ^ "AdGuard Content Blocker | Overview | AdGuard". Retrieved November 19, 2023.
  9. ^ Hougen, Aleksander. "The 8 Best Ad Blockers That Play Nice With Chrome, Safari, Firefox in 2020". Cloudwards. Archived from the original on January 11, 2021. Retrieved December 8, 2020.
  10. ^ Painter, Lewis. "Best ad blocker for iPhone & iPad". MacWorld. IDG Communications Ltd. Archived from the original on November 12, 2020. Retrieved December 8, 2020.
  11. ^ Hindy, Joe. "5 best ad blocker apps for Android!". Android Authority. Archived from the original on November 16, 2020. Retrieved December 8, 2020.
  12. ^ "Fight back against ads and malware online with AdGuard for 66% off". Mashable. October 16, 2022.
  13. ^ Vasily Bagirov (December 15, 2020). "AdGuard becomes the world's first public DNS-over-QUIC resolver!". AdGuard. Archived from the original on December 16, 2020. Retrieved December 18, 2020.
  14. ^ "AdGuard officially releases its own DNS service, and it works with Android Pie". Android Police. December 29, 2018. Archived from the original on August 1, 2019. Retrieved November 2, 2020.
  15. ^ "AdGuard. Get the software safely and easily". Software Informer. Retrieved May 7, 2023.
  16. ^ "AdGuard launches Manifest V3 compatible ad-blocker for Chrome - gHacks Tech News". gHacks Technology News. August 30, 2022.
  17. ^ "The best Chrome extensions to protect your online privacy and security". Android Central. April 30, 2020. Archived from the original on December 3, 2018. Retrieved November 2, 2020.
  18. ^ Daria Magdik "Google Removes Adguard App From Google Play" Archived May 1, 2020, at the Wayback Machine, AdGuard News, November 25, 2014
  19. ^ Orr, Andrew (July 23, 2018). "AdGuard Pro is Being Discontinued due to App Store Policy". The Mac Observer. Retrieved May 7, 2023.
  20. ^ Orr, Andrew (September 20, 2018). "Apple Won't Say Why It Blocked AdGuard and Freedom". The Mac Observer. Retrieved May 7, 2023.
  21. ^ Raj, Abhishek (June 5, 2019). "How to block ads on iPhone & iPad? Tips that work in 2022". Budding Geek. Retrieved May 7, 2023.
  22. ^ "AdGuard Pro for iOS is back from the dead!". Archived from the original on July 27, 2019. Retrieved July 27, 2019.
  23. ^ Whittaker, Zack (September 21, 2018). "AdGuard resets all user passwords after account hacks". TechCrunch. Retrieved May 7, 2023.
  24. ^ "AdGuard resets all user passwords after credential stuffing attack". ZDNET. Retrieved May 7, 2023.
  25. ^ Tom McNamara "All AdGuard ad blocker account passwords have been reset to fight off hackers"[permanent dead link], CNET, September 21, 2018
  26. ^ Domanski, Harry (April 19, 2018). "Google has kicked five malicious ad blockers off the Chrome Store". TechRadar.
  27. ^ Dan Goodin "Abusive add-ons aren’t just a Chrome and Firefox problem. Now it’s Edge’s turn" Archived December 9, 2020, at the Wayback Machine, ArsTechnica, November 21, 2020
  28. ^ "These VPN extensions are imposters that hijack your browser's search". November 24, 2020.
  29. ^ Michael Kan "Why Hackers Love Cryptocurrency Miner Coinhive" Archived December 3, 2018, at the Wayback Machine, UK.PCMag, November 29, 2017
  30. ^ Anthony Cuthbertson "Over 500 Million PCs Are Secretly Mining Cryptocurrency, Researchers Reveal" Archived November 1, 2018, at the Wayback Machine, Newsweek, October 13, 2017
  31. ^ Charlie Osborne "500 million PCs are being used for stealth cryptocurrency mining online" Archived July 15, 2018, at the Wayback Machine, Zero Day, October 13, 2017
  32. ^ Matthew Hughes "Facebook tracking is present in 41% of the most popular Android apps" Archived February 1, 2019, at the Wayback Machine,, March 23, 2018
  33. ^ Nadeem Sarwar "Is #DeleteFacebook Enough? Here’s the Harsh Truth About Facebook Tracking Through Apps" Archived September 24, 2020, at the Wayback Machine,, March 27, 2018
  34. ^ Cal Jeffrey "AdGuard reports that 20 million Chrome users have malware infected ad blockers" Archived June 24, 2018, at the Wayback Machine,, April 19, 2018.
  35. ^ Harry Domanski "Google has kicked five malicious ad blockers off the Chrome Store" Archived October 12, 2018, at the Wayback Machine,, April 19, 2018.
  36. ^ Rei Padla "GO Keyboard apps sends users’ data to servers and third parties, AdGuard says" Archived December 3, 2018, at the Wayback Machine,, September 23, 2017
  37. ^ Adarsh Verma "11 Million Android, iOS, Chrome, And Firefox Users Infected By Spyware: Delete These Apps Now" Archived December 3, 2018, at the Wayback Machine,, July 26, 2018
  38. ^ Wagas Amir "Popular Android/iOS apps & Extensions collecting highly personal user data" Archived December 3, 2018, at the Wayback Machine,, July 26, 2018
  39. ^ Catalin Cimpanu "Chrome Extensions, Android and iOS Apps Caught Collecting Browsing Data" Archived August 19, 2019, at the Wayback Machine,, July 25, 2018