Dr.Web is a Russian anti-malware company and the name of its flagship software suite. First released in 1992, it became the first anti-virus service in Russia. The company also offers anti-spam solutions and is used by Yandex, Russia's biggest search provider, to scan e-mail attachments. There is also an add-on for all major browsers which checks links with the online version of Dr Web. Dr.Web has withdrawn from AV tests such as Virus Bulletin VB100% around 2008 stating that they no longer represent the ability to counteract contemporary malware threats. Source: https://en.wikipedia.org/wiki/Dr._Web

Kaspersky Lab (Лаборатория Касперского, Laboratoriya Kasperskogo) is an international software security group operating in almost 200 countries and territories worldwide. The company is headquartered in Moscow, Russia, with its holding company registered in the United Kingdom. Kaspersky Lab currently employs over 2,850 qualified specialists. It has 31 representative territory offices in 30 countries and its products and technologies provide service for over 300 million users and over 250,000 corporate clients worldwide. The company is specially focused on large enterprises, and small- and medium-sized businesses.

PROMT is a world leading provider of automated translation software. The company develops PROMT translation software and dictionaries that have received numerous awards from leading computer magazines. PROMT offers translation solutions for the home and business use, as well as for Internet and corporate intranets. PROMT provides machine translation for 16 languages: English, Russian, German, French, Spanish, Italian, Portuguese, Chinese in two variants, Ukrainian, Kazakh, Turkish, Bulgarian, Latvian, Japanese and Polish, with a total of 64 translation directions The Ukrainian, Latvian and Polish language pairs included in the PROMT solutions are developed by Trident Software.

Symantec Corporation (commonly known as Symantec) is an American technology company headquartered in Mountain View, California, United States. The company produces software for security, storage, backup and availability - and offers professional services to support its software. Netcraft assesses Symantec (including subsidiaries) as the most-used certification authority. Symantec is a Fortune 500 company and a member of the S&P 500 stock-market index. The company also has development centers in Pune, Chennai and Bengaluru (India). On October 9, 2014, Symantec declared it would split into two independent publicly traded companies by the end of 2015. One company would focus on security, the other on information management. On January 29, 2016, the information-management business was spun-off as Veritas Technologies and sold to The Carlyle Group. The name Symantec represents a combination of the words "syntax", "semantics" and "technology".