Streak is honestly a great software. It's clean and easy to use but limitation appear as soon as you attempt to increase efficiency. Don't get me wrong, Streak is great but does streak accelerate your team's sales velocity? Are deals closing quicker? Are you generating leads faster? If your answer is no, which it probably is, then you should consider switching to LeadLoft.
Streak is the only CRM integrated entirely within your Gmail inbox, and works alongside all your other G Suite applications. It can be used to track many business processes including sales, partnerships, support, hiring, deal flow, and much more. Streak also includes a powerful set of email tools such email tracking, that lets you track when an email is opened.