Do you think it is more beneficial to pay for google ad or facebook ad? I am thinking about hiring a digital marketing company that is right down the street from me, https://duncrossmedia.com/ to help with creating ads for my local downtown Macon business...
Both are beneficial to popular your brand but according to my experience google ad is more better than other PPC to increase sales. So if you are starting brand new websites then should use both ads service and if you are looking to increase your sales then will recommend google ads. As i am seeing you are providing digital marketing services already then can't understand that why are you hiring digital marketing company to promote your website ??
Agree that it very much depends on your product. Often you can find very high intent keywords for adwords that will reliably bring in customers. They key to figure out is how expensive bidding on adwords is.
Google ads you can find people who are looking for your products and on Facebook you can show your product to people who never heared about your products or services.