Vince Steckler, the firm's CEO, said that the firm has reached the 130 million user mark for the reason that the software is effective and, when users realise the application works, they recommend it to their friends and colleagues.
Steckler claims that Avast is now the world's most popular antivirus program in three distinct categories: the size of its registered user base; its growth in the number of users during 2010; and in the high level of referrals from satisfied users.
60% of new users of the software, he explained, come from a user referrals and, whilst 20% of users download the `Worldwide-English' language version, they frequently add one of the 34 other language packs available.
"We work at being the most local of any antivirus software", he said, adding that, in France, Avast has become popular as the IT security software was one of the first to be fully localised.
"Regardless of where and in what language people originally have downloaded Avast, we make it easy for users to switch to their preferred language", he said.