How important is a trademark on the company name for a startup?

As a startup, you will put money and effort building your own brand from scratch and you don't want anyone to misuse your name later on. But also for the sake of cost, i would recommend registering the trademark in your home country and to also go for the U.S. where many companies host their websites and most of the giant cloud service providers are. This will at least guarantee that if someone misused your brand and their websites are hosted at one of those countries then you will be able to take an action against them. Later on, if your business model and strategy is to license your services in other locations then you might be looking at other countries to register your trademark.