If you look at the flow : Ideate — Experiment — Execute.
You can outsource part of the Ideation, to collect external inputs, but the main part should come from the inside.
Also the execution part can be outsourced, as it is easier to measure the quality of the deliverables.
I think the Experimentation should not be outsources as this is a very important for company growth, customer understanding and building internal skills.
What do you think?