I'm looking for a reliable digital marketing agency that provides a wide range of services, from website development to SEO for its promotion.

Well, there are a lot of good digital marketing companies out there right now. Probably, your choice should depend on how big your budget is, how high-quality services you want to get, and so on. I can recommend Digital Marketing Agency because I've worked with them many times and right now I'm waiting for these specialists to finish developing a new site.