[kryptiskt]

Tizen is Samsung's baby, no VC funding.

FirefoxOS, Mozilla's, no VC funding.

Ubuntu, Canonical is funded by Shuttleworth.

Android was a startup once upon a time before Google bought it, but that was before iOS was out.

The only actual VC-funded entry is the one you omit, Jolla.

[Zigurd]

Jolla at one point claimed to have €200m in capital. This is probably some Nokia and some Finland government money. Crunchbase does not list VC investors, or any investors for that matter.