While you’re fine-tuning your message, consider creating a "Why Us?" page. This is a key page, as it is where you lay out the argument or rationale for using your services over doing it without you or using your competition. If you can’t make a sound and compelling argument here, how can you expect your prospective clients to come to the conclusion that they should use your services?
We recommend going through the process outlined in the book, Creating Competitive Advantage by Jaynie L. Smith. This exercise will no doubt help you communicate this rationale more clearly and concisely verbally every time you interact with clients and prospective clients, as well as provide you with the rationale for using your services to present on your Why Us? page.