Unfortunately you won't be able to spread the word on HN or other social media sources until you have some revenue. If you're offering me free SMS - of course I

Unfortunately you won't be able to spread the word on HN or other social media sources until you have some revenue. If you're offering me free SMS - of course I'm going to use it, and I might not be likely to pay for your business features. Solution: create this product and market it right to businesses. Once you have a nice clientele, feel free to show it off to the world.