HubSpot is an inbound marketing system and has some great features.
Inbound marketing departs from traditional advertising practices that attempt to reach out and grab consumers. Instead, practitioners of inbound marketing  employ methods to be more easily found by potential customers—for example, those using search engines to look for products and services.
WordStream can be used as an inbound marketing system  to increase the quantity and quality of your inbound leads by helping you:
- Dynamically analyze and manage keywords and queries in real time based on traffic and conversions.
- Group keywords strategically with a speed and effectiveness you couldn't otherwise hope to achieve.
- Maintain large-scale paid search accounts with powerful keyword organization and negative keyword discovery tools.
- Get the most out of your efforts with workflow tools that will tell you everything from which Ad Group needs attention to which piece of organic content is likely to earn you the most money.
- Improve productivity, relevance, and value by increasing your Quality Scores, saving time spent on manual tasks, discovering valuable keywords, and streamlining your PPC and SEO efforts.