We're currently in the early stages of building an audience and community. We are using Spokal to track our engagement with our audience. It allows us to monitor site activity, build Twitter followers, and (in the future) monitor the activity of our visitors so that we can maximize our engagement with them. We looked at Hubspot but it's far too expensive at this stage in our company. Spokal provides most of what we need for our growth hacking needs.
Allowing the import of audience/customers from Mailchimp or ActiveCampaign (they are working on this as we speak)
The unique visitors number is different in Spokal from Google Analytics. Not sure why this is.
The blog editor is better in Wordpress, so I end up creating my posts directly on my Wordpress site rather than through Spokal. I'll try this again but I had an easier time creating the post in my Wordpress site.
I haven't really tried other products at this point. I would say I tried to cobble together a bunch of options to make the right inbound marketing "tool suite". Nothing quite worked well enough. Again, Spokal serves as a very cost-effective option. Particularly relative to Hubspot.
I don't know Hubspot but this is sort of a poor man's Hubspot. It provides a lot of bang for your buck. For startups that are trying to get some traction in terms of inbound marketing early on, I would highly recommend Spokal as a very powerful and cost-effective tool.