Sidekick by Hubspot provides powerful contact insight right In your inbox with a supercharged and integrated email tool – because every hero needs a Sidekick. Contact profiles right in your inbox: See a person’s title, company, social profiles, and recent tweets.Check out recent conversations, email opens/clicks, and other email activity. See who opens and clicks on your emails: Never be stuck wondering. Instantly know when your email was opened. See where, when, and how many times they opened/clicked. Sidekick works with: Gmail, Outlook, Outlook.com, Apple Mail and Salesforce.