Is it possible to post a project both on Kickstarter and Indiegogo?
Is there any exclusive clause on these crowdfunding websites? If not why don't people do that, it could hedge their risk.
When your attention is split on two different and identical campaigns, both of them will fail. Choose one and make it count.
It will inevitably take A LOT OF work to do one campaign than most people anticipate. Don't underestimate the work of promoting and handling it.
I might like it if the fundraisers were complementary and addressed to the same target groups, but actually different.
Also Kickstarter requires you meet your goal in order to get any money. It would be a shame if you got half the money on IndieGoGo and your Kickstarter failed because of it.