We aim to make the most powerful yet light-weight protection

We aim to make the most powerful yet light-weight protection

Emsisoft’s ideal is a malware-protected world, 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 solutions that are efficient, powerful, unobtrusive and minimalistic.

All of our products do their job perfectly; keeping your digital world safe. We leave your computer’s power where it belongs: with you.

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 is much faster and lighter than most single-engine products.

Innovative, Next-Gen

Emsisoft uses an innovative, holistic approach to prevent emerging threats before they are identified by traditional means. Monitoring the entire 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, AVLab 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.

Privacy Conscious For You

We are loyal to our customers. We don’t track your activities, we don’t share your data, and we don’t betray you for a quick profit by installing stuff that you don’t want. We simply offer efficient anti-malware, for your computer and you.

Based in New Zealand. Trusted all over the World.

Our story

Emsisoft’s roots can be traced all the way to back to 1999 when our CEO Christian Mairoll kept receiving a nasty backdoor Trojan, “Back Orifice”, from so-called ‘friends’ via ICQ. As it forced the CD drive to repeatedly open and close, his curiosity sparked. How does this Trojan work? How do I get rid of it? It was then that the first line of Emsisoft Anti-Malware’s code was written.

By 2003 what had started out as a hobby project became an anti-malware company for the masses and has been growing its staff to 40 passionate individuals today. Our team of leading experts dedicates its time and effort to defending millions of customers from the never ending stream of online threats.

Today, Emsisoft is headquartered in New Zealand but maintains a global presence through local teams across all time zones. Malware doesn’t sleep, and nor do we.

Recognition we’ve earned

Multiple awards

AVLab 100%, VirusBulletin VB100, AV-Test Certified, AV-Comparatives Top Rated Product of the Year, MRG-Effitas #1, COMSS.RU #1, more.

Individual awards

AVLab: Product of the Year 2022, PCSL: AV of the year, Cyber Defense Magazine: AV of the year, ProtectStar Award, Austria’s Leading Companies: First place, Constantinus Austria.


Microsoft Certified Partner, OPSWAT Gold Partner

Company history

2023 – Ransomware Rollback – App Inventory – SIEM & RMM Integrations

Improved ransomware protection with a sophisticated rollback functionality. Remote management of installed applications. Improved data feed export for SIEM platforms and a series of new integration packs for RMMs.

2022 – EDR with Timeline, Execution Trees and Threat Hunting tools – New Content Filtering

Official launch of the Emsisoft Endpoint Protection platform with a new, more efficient Incidents management panel, new threat details with a full timeline from initial infection vector to remediation, and a new OSquery powered Threat Hunting panel to run real-time SQL queries on protected devices to find anomalies. The new Content Filtering feature enables to block access to websites in the categories ‘Unwanted programs’, ‘Porn’, ‘Gambling’, ‘Social Media’, ‘Fake News’ and ‘Scam’.

2021 – Complete API – New EDR – Helping Ransomware victims big time

All functionality of our Management Console is now available through a REST API. A new ‘Incidents’ panel in the Management Console is a starting point for further EDR functionality. Emsisoft establishes as a leading entity in the fight against ransomware and helps dozens of very large organizations to recover more quickly.

2020 – ‘Cybersecurity Engineered for Humans’ – Customized ransomware recovery – New MSP plans

The new tagline perfectly summarizes the nature of Emsisoft: We create technology that protects the people, not just the computers. Ransomware is still threat number one and leads us to providing custom decryption services to get medium and large organizations around the world faster back to business. New monthly billing plans for MSPs and major improvements in the Management Console support our commitment to a B2B SaaS business model. Emsisoft again earns all VB100 awards that year and adds a 100% clean sheet in AVLab tests.

2019 – Launch of Emsisoft Management Console and Emsisoft Browser Security

The year starts with the release of Emsisoft Browser Security. New browser extensions for Chrome, Firefox and Edge that complement the host-based Web Protection component to block dangerous and fraudulent websites. However, the biggest news of 2019 is Emsisoft Management Console, an online portal that allows users to remote manage and configure Emsisoft protection products from a central dashboard. Emsisoft also releases free decrypters for more ransomware strains than any other company and helps victims to save millions of dollars. Emsisoft again earns all VB100 awards that year.

2018 – The big cleanup – Re-inventing Emsisoft as a SaaS oriented business

The dev team works systematically through all parts of the software to simplify usage and streamline functionality for maximum efficiency. A new common design for the user interfaces on the desktop and on the web is applied. New features include an Emergency Kit Maker to compile a cleaning kit on the fly and a new dark mode. GDPR compliance is achieved. The separation of Home and Business license plans with static annual pricing underlines the Software as a Service (SaaS) character of the business.

2017 – Ransomware outbreaks – Evolving protection – End of the firewall era

Ransomware outbreaks of WannaCry and Petya take many around the world by surprise but Emsisoft users are protected thanks to the improved Behavior Blocker. The Emsisoft Internet Security product gets merged with Emsisoft Anti-Malware and adds a new Windows Firewall fortification feature. A new permissions system, a new exclusions dialog, extended forensic logging, new email notifications and a new auto-resolve mode for alerts make the software even more powerful. Product versions now reflect the month that they were developed in, i.e. “2017.1”. Emsisoft takes the term ‘Web Protection’ literally and teams up with Surf Life Saving to map dangerous currents.

2016 – Ransomware, ransomware, ransom everywhere!

The bad guys keep us quite busy by creating heaps of new variants, but Fabian answers with a plethora of decrypters, free of charge. One author even dedicates the name for his ransomware “Fabiansomware” to our CTO. Later that year, Emsisoft joins the No More Ransom initiative of Europol, Dutch Police and renowned ransomware experts in the industry. Emsisoft Anti-Malware and Emsisoft Internet Security 12 add an improved behavior blocker, specifically trained to block ransomware, and a reworked scan engine, optimized for detecting potentially unwanted programs. Team size grows to 40.

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 Armor.

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 Web 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.

Executive team

Christian Mairoll – Managing Director

Emsisoft’s founder and head tactician. Believer in ethical business practices. Loves to design and optimize user interfaces for maximum efficiency and practicality. Austrian, based in New Zealand.

Davlat Aminov – Business Development

Responsible for setting up and managing the company’s worldwide distribution and strategic partnerships with the goal of having a local Emsisoft representative in every country. Uzbek, based in Germany.

Fabian Wosar – Ransomware R&D

The world’s leading authority on ransomware. Prolific ransomware slayer, decryptor developer and polar bear aficionado. Persistent thorn in the sides of threat actors everywhere. German, based in the United Kingdom.

Arief Prabowo – Malware Lab

Leads the Lab team through the underbelly of the malware world. Responsible for spearheading research and development and pushing the protection capabilities of our products. Based in Indonesia.

Luke Connolly – Threat Analysis

Threat intelligence analyst. Keeps an eye on the dark shadows of the internet so you don’t have to. Based in Canada.

Aika Zhakassova – Marketing

Driving brand awareness and market impact through creative leadership, orchestrating the perfect harmony of strategy and communication to captivate our audience. Kazakh, based in Spain.

Sergey Soloviov – Desktop App

Oversees all aspects of our desktop app code, from drivers and core engine components to business logic and the user interface. Ensures our protection software delivers top-tier protection for our customers. Based in Ukraine.

Viacheslav Mikhailov – Web App

Leader of web app development, navigating the Emsisoft product roadmap with style. Pulls together different pieces of the puzzle to refine our protection software and bring new features to life. Based in Ukraine.

Sergey Cherevychenko – Quality Assurance

Head of the QA team. Finds the wrinkles and irons them out. Puts our software under the microscope to ensure every aspect of our products measures up to Emsisoft’s strict quality standards. Ukrainian, based in Spain.

Fabio Di Bari – Customer Support

Among the first line of defense between you and anything that keeps your experience with Emsisoft products from running smoothly. Taking the hits so you don’t have to. Italian, based in Romania.

Want to join our team? Check out our current job offerings

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