I think big companies most of the time are looking for the business opportunity that the new acquisition can bring and also how well the new acquisition fits on

I think big companies most of the time are looking for the business opportunity that the new acquisition can bring and also how well the new acquisition fits on their vision for the company. Usually they prefer if the software written by start-up is already scaled & written in production setting but bigger companies always have resources to help them with these transitional stuff.