I think I like the base design, it's nice and clean. That said, I'd consider trying to separate the entries on the startup page a little more clearly.
With those huge images especially, at first glance it looks a little like one big entry, rather than several. Perhaps some sort of clear header for each, like the 'Our Start-Ups' div at the top of the page.
It needs a call-to-action. Something which entices the user/customer and something that says what the site is all about in the top half of the site. Just talking about 'Our Start-ups' etc isn't enough to do that job! Good luck.
I liked the site design. But it will be more good if you make the layout like a gallery and remove the description. It would be good if you make something like, when user clicks on the gallery image then the description will pop up
General design is clean, but a bit scattered, a lot going on everywhere. Site has three issues: a.) font size is way too small; b.) the ones that are not too small lack attractions that make people want to click on them to know more; c.) after browsing the site briefly, I still don't have a strong impression of what the site is about.