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Is there data on how many users have Flash, Java, or Unity plugins installed?

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Remember that penetration is a less useful measure than penetration + (1 - penetration) * conversion. – user744 Jan 28 '11 at 10:33
Equation in word form for posterity: What matters is how many people will use a plugin to view my content, either because they already had it or converted to it just to see my content. – Vincent Scheib Jan 29 '11 at 20:11

This website extrapolates from a panel of some sort:

Bottom line as of posting this:

  • Flash: 97%
  • Silverlight: 70%
  • Java: 75%
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Silverlight 70%? I find that difficult to believe. – Jari Komppa Jan 29 '11 at 11:06
Mail RIA stats then... – Alex Schearer Jan 31 '11 at 19:35

Others have mentioned Flash, Java and Silverlight. Sadly there are no official numbers for Unity I'm aware of. In a rather old blog post they talk about ~1% pre-installed user base. This article over at Gamasutra also assumes 1% penetration. Although the conversion seems to be rather high (people willing to install the plugin).

User base might also increase with gaming platforms like Kongregate supporting Unity Web-Games.

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According to the Adobe Flash website, Flash Player Version Penetration, it's about 99-98% in most markets.

Java is also pretty ubiquitous. Unity is less frequently found, however the installer is inline and quite small in most cases.

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