Thanks for the ref Jon Westenberg. Great design can be important if one of the messages you’re conveying is that your team has the design chops to make something customers will love because it’s beautiful.
Good designers don’t need to depend on a flashy tool like Prezi to do great design. They can do great design in PDF, or even (shudder) Powerpoint ;-)
Getting a pitch to an investor should be all about removing any barriers to opening and comprehension, and reducing their comprehension time.
So don’t send somebody a Prezi deck because it requires Flash, which OSX and iOS don’t like. Don’t send anybody a video, because videos require the investor to watch all the way through, and good investors like to navigate their own way through a pitch deck, not wait for your starburst animation to finish. Don’t send somebody a Keynote deck (because they may not have Keynote) and don’t send them a Powerpoint (because they may not have Powerpoint installed on their iPad).
Don’t send them a Dropbox or Box or iCloud link because: fear of links from strangers.
Just send them a plain text email with a PDF attachment. And if the PDF attachment is bigger than 5Mb take your designer out back for a good thrashing and make them do it again.