I can talk about inbound marketing and Hubspot for days but this is one of the few softwares that does it all. If you're considering this I recommend getting Inbound certified and then when you get the product getting Hubspot certified to learn everything you need to know.
Startups, of course, never have enough hours in the day, but with HubSpot, your hours go a lot further. I can create a landing page in an hour, which is insanely helpful for me, and also my development team as I no longer have to pull them away from product to help me out. You can automates (almost) all of your marketing activities: email, social, campaigns, workflows, lead scoring, and even tie in ads!
As a marketers I have has the chance to use many different marketing automation platforms for the last 12 years. The evolution is amazing in this time period, but so far, Hubspot has been my favourite marketing automation platform. Super complete, we can manage and report on most digital channels. I am an Inbound and Hubspot fan!
Before you apply, please be aware that you must be backed by a VC, incubator, or accelerator currently in HubSpot's partner program
Don't be deceived by the entry level costs!