Multiscanning is running multiple anti-malware or antivirus engines concurrently. Traditionally, only a single engine can actively scan a system at a given time. Using multiple engines simultaneously can result in conflicts that lead to system freezes and application failures. However, a number of security applications and application suites have optimized multiple engines to work together.
Testing agencies published results showing that no single antivirus engine is 100% effective against every malware threat. Because each engine uses different scanning methodologies and updates their malware definition files at various frequencies, using multiple engines increases the likelihood of catching malware before it can affect a system or network.
- F-Secure – Combines an in-house engine with BitDefender's engine.
- G Data AntiVirus – Combines in-house and BitDefender's engines. avast has been removed with version 2014.
- HitmanPro – Combines an in-house behavioral engine with a cloud containing engines from Kaspersky Lab, BitDefender and Sophos.[better source needed]
- Lavasoft Ad-Aware – Combines an in-house anti-spyware engine with Bitdefender's engine.
- Microsoft Forefront – Combines the engines of Authentium, Kaspersky, Norman and VirusBuster, with its own in-house engine.
- OPSWAT Metadefender – Combines a configurable number of anti-malware engines (1 to 30) to scan for malware on-premises. Also available with 42 engines in the cloud.
- Qihoo 360 Internet Security use Bitdefender Engine, QVM 2 Engine,360 Cloud engine. But, Chinese version includes Avira engine additionally.
- TrustPort Antivirus – Combines the engines of BitDefender and AVG.
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- Bitdefender Releases Carrier IQ Finder for Android.
- Complete coverage of the G Data Internet Security 2010 Antivirus & Security Software. PCWorld (2009-05-28). Retrieved on 2012-02-29.
- New Microsoft Forefront Software Runs Five Antivirus Vendors' Engines. Dark Reading (2010-05-05). Retrieved on 2012-02-29.
- Metascan Antivirus API | Symantec SDK, McAfee API, Kaspersky API. Opswat.com. Retrieved on 2012-02-29.