AVG AntiVirus Free vs Microsoft Defender Antivirus Comparison

• AntiVirus Free: Free; the Android app shows third-party ads
• Internet Security for 1 PC, renewal: $79.99 a year, the price the store calls the renewal price
• Internet Security for 1 PC, first year: Intro: $39.99 for the first year
• Internet Security for 10 devices, renewal: $109.99 a year, the price the store calls the renewal price
• Internet Security for 10 devices, first year: Intro: $59.88 for the first year on the store page, $59.99 on the product page
• Ultimate for 10 devices, renewal: $149.99 a year, the price the store calls the renewal price; $59.88 for the first year

• Included in Windows: Built into Windows; not sold separately

The product privacy notice (updated 26 August 2026) says the desktop app, which covers AVG AntiVirus Free and Internet Security, sends samples of suspicious files and detection metadata to AVG's servers through CommunityIQ, and that AVG may 'directly analyze suspicious files in our safe environment'. For the desktop app it also lists 'URLs and referrers (malicious URL information may also include search terms or cookie information associated with the malware)', kept for 36 months, the IP address, installed applications and security software, and product usage events. On Android, the notice lists the URLs of websites visited, 'malicious and non-malicious', for 36 months. The support article on privacy settings lets you untick sharing of threat data and of app-usage data; the 'Offers' setting cannot be switched off in the free version.

Cloud-delivered protection is on by default. When the app cannot decide about a file on the device, it sends the file's metadata to Microsoft: hashes, file name and size, signer, the process that touched it, the download address and IP, the hashed file path, and the device's OS version, locale and geographical location. If that is not enough, Microsoft can request the file itself. The default setting sends 'safe samples' such as .exe, .dll and .bat files automatically and asks you before sending a file likely to contain personal data. You can switch off sample submission or cloud-delivered protection in Windows Security; Microsoft's documentation says detection metadata is still sent when sample submission is off.

The Gen Digital general privacy notice says 'We do not sell your personal data to third parties' and also 'Where permitted by applicable law, we may share personal data with third parties for advertising purposes'. The product notice says the free Android app 'serves relevant third-party advertisements' through partners it lists (Google AdMob, Amazon, Facebook Audience Network, InMobi, AppLovin, Unity Technologies, IronSource and Liftoff Mobile), and that the advertising ID is processed for IronSource. The consent policy says consent is asked at installation and an equivalent paid version has no ads. The desktop app uses Google Analytics; the phone apps use Google Firebase, AppsFlyer and Singular. In the free version, the 'Offers' setting based on app-usage data cannot be disabled. The support article says 'When you use most AVG applications, you share anonymous data with AVG and other third parties' and that you can opt out at any time.

Microsoft's privacy statement says Defender Antivirus automatically sends reports about suspected malware and unwanted software and may send files for inspection, asking first if a report may contain personal data. Windows required diagnostic data, which includes a Defender health event with a Defender machine ID, is stored with unique identifiers and used to keep Windows secure and to improve Windows. If you turn on the Windows setting Personalized offers, Windows diagnostic data is also used for tips, ads and recommendations. The statement also says Microsoft discloses personal data for digital advertising, and in response to valid legal process from law enforcement and government agencies.

AVG is part of Gen Digital Inc., whose privacy team is in Tempe, Arizona; the group says it has dual headquarters in Prague and Tempe. For users in the European Economic Area the controller of personal data for AVG products is a Czech company in Prague, so EU data protection law applies to it. The group notice says personal data may be disclosed to public authorities and in legal proceedings.

Microsoft Corporation, One Microsoft Way, Redmond, Washington, is the data controller; for the European Economic Area, the UK and Switzerland it is Microsoft Ireland Operations Limited in Dublin. Microsoft takes part in the EU–US, UK and Swiss data privacy frameworks.

AVG says it has made security software since 1991. In 2016 a larger antivirus company bought a majority of AVG Technologies N.V., then listed on the New York Stock Exchange; that buyer was itself acquired in 2022 by the company now called Gen Digital, listed on NASDAQ, and AVG's site and notices now carry Gen Digital's name.

Microsoft was founded in 1975 and trades on the stock market as MSFT. Its antivirus began in 2009 as Microsoft Security Essentials, became Windows Defender in Windows 8 and 10, and was renamed Microsoft Defender Antivirus in 2020.