Streak is a Gmail-native CRM with tracking bundled in. The pricing ($19-$159/user/mo yearly), the Gmail-only constraint, and the architectural choice to put the CRM inside Gmail are all structural — not preferences that can be tuned. Teams typically search for alternatives when one of those structural fits breaks: they add an Outlook user, decide they want a CRM that lives outside Gmail, or realize they're paying for CRM features they don't use.
These are the six Streak alternatives worth evaluating, organized by which structural decision you're rethinking: keep the CRM but move it outside Gmail, drop the CRM and just keep tracking, or replace the whole bundle with a different shape entirely.