I have built a simplified inbound marketing product called inBoundio and had written a post about this too http://www.inboundio.com/blog/51-inbound-marketing-ways-to-m..., this should be able to help you take off.

Feel free to mail me at "pushkar (at) inboundio(dot)com" too, will be more than happy to help you

Hubspot may be a way to go depending on the stage you are at. There was a good discussion on GrowthHackers on this recently: http://growthhackers.com/questions/ask-gh-is-hubspot-a-good-...

I'm a marketing consultant so maybe I can help point you in the right direction, but... Can you specify what kind of needs you have? "Marketing needs" covers a huge swatch of things. If you're looking for a company that "does it all," then really what you're looking for is a boutique marketing agency.

My question was not geared towards a specific business, but I would be interested in online marketing needs. Any suggestions for "boutique marketing agencies" (including yours)?

Sorry, I'm not totally clear on what you're looking for. My specialties are analyzing and optimizing conversion funnels (aka, user acquisition).

There are also startups that solve a specific marketing need. For example, Sverve (http://www.sverve.com) helps you find and work with female bloggers who will promote your content for a fee.

http://www.hittail.com/ comes to mind. (It's self-funded, though - slightly different kind of startup.)

https://www.projectwonderful.com/ might also fit that description.

BuzzSumo helps with content marketing by showing you what content resonates the most with audiences for any topic.

Marketing is a really vague thing to ask for help with. What are you looking to accomplish specifically?