HubSpot

HubSpot is an all-in-one CRM from the company of the same name, which has been building it since the days when almost nobody knew the term "inbound marketing." It combines contact management, sales pipeline, email marketing and customer support into a single tool. It suits early-stage founders, B2B companies and smaller agencies that want a clear overview of their customers without needless complexity.

It works by letting you add or import your contacts and companies, and HubSpot gradually attaches their entire history to them: sent emails, calls, meetings and the stage each deal is in. It tracks who opened your email, who visited your site and how deals progress, so you know exactly who to focus on and when to reach out.