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Avast Software s.r.o. engages in the development and provision of security software applications. It offers Internet security, antivirus, SecureLine virtual private network, password privacy, AntiTrack, browser cleanup, driver updater, and CloudCare solutions for tablets and personal computers. The company was founded by Pavel Baudiš and Eduard Kucera in 1988 and is headquartered in Prague, Czech Republic.

AVAST Software NV develops Internet security software and related solutions for individuals and businesses. It provides security software delivered through a free-to-premium or 'freemium' model. The company was founded by Pavel Baudiš and Eduard Kucera and is headquartered in Amsterdam, the Netherlands.

Avast Holding BV engages in the provision of antivirus security software products. It operates through the Consumer Products; and Products for the Small and Medium Business segments. The company is headquartered in Schiphol, the Netherlands.

Avast Plc is a holding company, which engages in the provision of security software. It operates through the Consumer Products, and Small and Medium Business (SMB) segments. The Consumer Products segment offers desktop security, server protection, mobile device protection, and consist of free and premium paid products for the individual consumer market. The SMB segment focuses on delivering high-level security and managed protection solutions for Small and Medium sized business customers. The company was founded in 1988 and is headquartered in London, the United Kingdom.