Who is Emsisoft?

Emsisoft’s Vision: A Malware-Free World

Emsisoft's vision of a malware-free world means it's a place where:

  • Home and business computer security is engineered to perfection.
  • Our software effectively detects new threats before your computer is compromised.
  • We produce innovative Anti-Malware that is efficient, powerful, unobtrusive and minimalistic.
  • All of our products do the job perfectly, keeping your digital world safe - and leave the computer’s power where it belongs: with you.

Our mission

Make the most powerful yet light-weight protection software, in a way that’s easiest for everyone.

Our core values:


Our software is designed to keep your computer Malware-Free and working as it should. Much like a nasty virus, over-complicated and over-engineered software will slow down your computer. Our protection software is feature-light and unobtrusive by design.

High Powered

Our cleaning scanner runs on a dual scan engine that combines two of the best virus scanning technologies in the industry. The result is high powered performance, that’s actually much faster and lighter than most single-engine products.


Emsisoft uses an innovative, holistic approach that’s called behavior blocking technology to prevent emerging threats before they are identified by traditional means. Monitoring the system as a whole is our specialty.


Every year more than one million people download our products. And every year our products prevent over 20 million infections. Our software is trusted by millions of people, worldwide. According to analysts, Emsisoft already has a market share of more than 1% of the global anti-virus market.

Award Winning

Emsisoft receives the highest marks time and time again from AV-Comparatives, Virus Bulletin, MRG-Effitas, and many other independent authorities. Winning awards isn’t why we do what we do, but it does confirm that our lightweight software can still provide the most comprehensive protection. Check out our latest awards.

Entirely For You

We are loyal to our customers. We don’t track your info, we don’t share your data, and we don’t betray you for a quick profit by using nasty toolbar bundles. We simply offer efficient Anti-Malware, for your computer and you.

We’re a Virtual Company

Since its foundation in 2003, Emsisoft has been entirely virtual. Our 30+ employees are located all over the world, but work together as if they were in the same building.

Like our software, this virtual structure is powerful and efficient. We have no fancy headquarters and we don’t enforce a dress code. Most of our employees work from home, and all of them love what they do.

Virtualization reduces our company’s impact on the environment and gives us access to talented experts from around the world. Emsisoft has a global presence, with employees across all time zones. Malware doesn’t sleep, and nor do we.


Things We Value

Emsisoft is convinced that treating our customers in an honest and respectful manner is the foundation of sustainable business.

Today, many software companies aim for quick cash, even if that means mistreating or fooling their customers. Emsisoft has never, and will never, play that game.

We create malware protection for people, plain and simple. If you are using our product and you have a question, we will be there to answer it - in the quickest, least complicated and most enjoyable way we can.


Recognition We’ve Earned

Microsoft Certified Partner, OPSWAT Gold Partner

Multiple awards:
AV-Comparatives Advanced+, VirusBulletin VB100, MRG-Effitas #1, COMSS.RU #1, AVLab.PL #1, more.

Individual awards:
Austria’s Leading Companies: First place, PCSL: AV of the year, Cyber Defense Magazine: AV of the year, ProtectStar Award, Constantinus Austria.

Company history

2015 - Emsisoft scanner code overhauled - Company grows to 30 - Adds new trophies to award shelf

The scanner code for Emsisoft’s three main products – Emsisoft Anti-Malware, Emsisoft Internet Security and Emsisoft Emergency Kit – gets an overhaul that includes a new super-fast Malware-Scan option that does a full system check in less than a minute. Native x64 support is added to ensure available system resources are used more efficiently. By the end of the year Emsisoft employs 30 team members and adds plenty of new VirusBulletin VB100 and AV-Comparatives Advanced+ trophies to its award shelf. Emsisoft Internet Security (which is Emsisoft Anti-Malware + Online Armor's firewall component) replaces Online Armour.

2014 - New Emsisoft Mobile Security - New user interface - New Emsisoft Internet Security - Moving to NZ

Entering its second decade Emsisoft unveils a new product to protect Android devices. This follows the innovative change of the user interface in Emsisoft Anti-Malware 9 and the release of the first combined Antivirus + Firewall product, Emsisoft Internet Security. After moving the company from Austria to New Zealand, the year ends with four VB100 awards, five "Advanced+" awards, and a "Top Rated" award from AV-Comparatives for the outstanding performance throughout the whole year.

2013 - Emsisoft Anti-Malware triumphs in tests by AV-Comparatives, MRG-Effitas, and more

Emsisoft Anti-Malware 8 brings faster and significantly smaller online updates. With its many improvements, there seems to be no stopping our software from winning numerous awards, including 100% in AV-Comparatives real-time protection tests and MRG-Effitas online banking tests, first place in COMSS.TV antivirus test as well as the highest possible certification in the AVLAB.PL performance test. We also gain all VB100 awards for 2013. Emsisoft's solid business performance sees us win 1st place in the small business category of the "Austria's Leading Companies" competition for the Salzburg region, as well 2nd place for the Austria-wide ranking.

2012 - Change of secondary scan engine - Launch of IsThisFileSafe.com

Emsisoft Anti-Malware 7.0 heralds a new technological partnership with Bitdefender, and finishes first with a detection rate of 100% in all real-time protection tests run by MRG-Effitas in 2012. We win two VB100 awards. Emsisoft Online Armor 6.0 integrates the cloud information of the 10 million known files in the Emsisoft Anti-Malware Network. The website www.isthisfilesafe.com grants public access to the entire file database.

2011 - Emsisoft Anti-Malware with best protection in MRG test - 1% market share

In a test comparing anti-malware software, the MalwareResearchGroup has once again awarded the top position to Emsisoft for its excellent protection against new threats, thereby placing it well ahead of the 19 biggest players on the market. Emsisoft Anti-Malware 6.0 offers up to 450% faster scans, uses fewer resources, and for the first time breaks the 5 million signatures mark. Online Armor Firewall 5.0 with new File & Registry Shield gets published. More than 6 million users rely on Emsisoft products, and market research companies estimate Emsisoft's antivirus software market share is more than 1%.

2010 - Taking over Online Armor Firewall - New Emergency Kit - Good bye a-squared

Emsisoft acquires Online Armor Firewall, the leading firewall brand and "Firewall of the Year 2009", from Australian manufacturer Tall Emu. Emsisoft Anti-Malware is released without the "a-squared" for the first time in its version 5.0 and with the new freeware mode it succeeds a-squared Free. As one of the first products with behavior analysis that fully supports x64, it wins its first VB100 Award. In December, the first version for Windows servers gets released. Emsisoft Emergency 1.0 is the first free and fully portable dual-engine scanner for use on USB sticks or CDs. Tools for businesses are being launched. Among these are the update proxy, commandline scanner and new helpdesk licenses.

2009 - MalAware 1 min scanner - winning tests constantly

The independent antivirus test organization PC Security Labs compares detection rates of antivirus software and concludes repeatedly that Emsisoft's Anti-Malware has the best detection rate of all. This has won our software the Antivirus of the Year Award. MalwareResearchGroup confirms these results. The users vote Emsisoft's Anti-Malware the winner of the Epsilon Shareware Award 2009. The ultra-fast and extremely small 1 minute cloud scanner, MalAware 1.0, is published. Emsisoft announces a technological alliance with Tall Emu, the manufacturer of the Online Armor Firewall.

2008 - First free dual engine virus scanner worldwide

a-squared Anti-Malware receives a second scan engine with version 4.0. By combining our own scanning technology with Ikarus Antivirus' proven technology, we take the detection skills of Anti-Malware to a whole new level. a-squared Free will also be receiving the second engine making it the first free dual-engine scanner in the world. The new Surf Protection in a-squared Anti-Malware is now also blocking known dangerous and fraudulent websites. Also new in Emsisoft's product range: the Emsisoft Emergency USB Stick for offline cleaning of infected PCs. Mamutu 1.5 gets a community-based recommendation function that helps decision making easier when faced with behavior analysis alerts.

2007 - Isolation of behavior analysis for a new product: Mamutu 1.0

In order to demonstrate the company's key competence, we integrated Emsisoft Anti-Malware's behavior analysis into a new independent product called Mamutu. Version 3.0 of a-squared Anti-Malware takes the product to a new level in professional use. Some new features include: support for non-admin accounts, support for Windows Vista, introduction of the Anti-Malware Network as well as optimized utilization of RAM.

2006 - Emsisoft 2.0: Round Two for most products

Product maintenance is the main focus: a-squared Anti-Malware 2.0 features a new and easier to use program interface, a-squared Free 2.0 comes with advanced scanner features, a-squared HiJackFree 2.0 offers optimized system analysis for professional users, and a-squared Anti-Dialer 2.0 protects you from expensive dialers. About 3 million users now rely on Emsisoft products.

2005 - Innovation: Protection against new and unknown threats through behavior analysis

a-squared Personal 1.6, Emsisoft Anti-Malware's predecessor, receives the Emsisoft behavior analysis module for the first time. At the time it is called Malware IDS (Intrusion Detection System) and shows how to put an end to the cat-and-mouse game that the antivirus industry and malware authors are playing, namely through generic detection of behavior patterns. It is way ahead of its time.

2004 - The market niche - Emsisoft Online Security Check

The Emsisoft website allows visitors to perform online audits of their PC protection by externally and automatically attempting to break into their PC and by uncovering configuration gaps. a-squared Personal is, at that time, a pure niche product against trojans and worms, supplementing classical antivirus software.

2003 - The idea - Foundation

Emsisoft is founded as an association of people interested in malware who have had several years of experience in the field and are committed to providing better protection against Internet threats. Emsisoft thereby follows the already highly successful projects Anti-Trojan, ANTS and YAW. On December 10th 2003, the first version of the new product a-squared (a²) was published.


Christian Mairoll

Christian Mairoll - CEO

Emsisoft’s founder and visionary. His initials were the inspiration for the brand’s name. That’s "Emsi": "MC", hence "Emsi".

Davlat Aminov

Davlat Aminov - Sales & Partner

Responsible for setting up and managing the company’s worldwide distribution and dealer network with the goal of having a local Emsisoft representative in every country. The list is growing all the time.

Fabian Wosar

Fabian Wosar - CTO

Responsible for keeping Emsisoft ahead of the curve and our users protected. Emsisoft's resident geek and polar bear lover.


Microsoft Certified Partner