Buffer is a social media marketing tool built to make it easier to drive brand engagement and provide analytics for companies that are active on Twitter, LinkedIn, Instagram, Pinterest, and Facebook. With a freemium business model, and an easy to understand 2-tier pricing, perhaps the most unique thing about Buffer's pricing is their use of add-ons. Add-ons typically are best utilized to gate specific features which are useful only to specific segments, giving customers the ability to customize their plan based on which features they need. With Buffer's pricing model, users in the paid "Essentials" tier can choose to pay for an optional Team Pack that includes additional collaborative features as part of their subscription.