How do you promote an outsourcing web development company? E

We do web development outsourcing from Romania. We rarely work with end-user businesses, instead we tried to align our service with companies from western countries that do web development and pass the projects down to us.

We would like to expand our outsourcing efforts and grab more end-user clients. What are the best way to promote our service?

Where the service isn't a web application or some kind or product (no user signups, etc.) like many blogs write about where you could do email marketing, inbound marketing or even raising VC money...