Quite simply, you want to spend more time driving business and creating effective solutions and/or experiences for customers and less time managing content.
The easiest way to do that is with a custom Content Management System (CMS): A content management system built specifically for your business or startup, and its unique needs.
In the longrun, it's a cost-effective solution to quickly get your content out into the world, and a straightforward, future-proof way to manage that moving forward.
While many have got caught up in the off-shelf/free craze when it comes to Content Management Systems, jamming square pegs into round holes with products like WordPress or Squarespace, in the end, fails to realize one very important ingredient for startup success: A sophisticated startup business gearing up to change their corner of the world has sophisticated needs.
Those needs can easily be underserved by trying to make an off-the-shelf CMS work for your business, which are really designed for hobbyists and the lowest common denominator.
In the end, maintaining and being limited by these type of free/cheap CMS's can be extremely costly long-term, so think twice before implementing one for your business at the get-go, as "free" or "cheap" is rarely ever actually free, or cheap.