Gmail is a free, advertising-supported email service offered as part of Google's G Suite, with 15GB of storage, color-coded inbox filters and unsend button.
Google Cloud DNS is a scalable, reliable and managed authoritative Domain Name System (DNS) service running on the same infrastructure as Google. It has low latency, high availability and is a cost-effective way to make user applications and services available to users.
Mixpanel is a website & mobile analytics tool which aims to help businesses understand visitor behavior by tracking application engagement & interaction in real-time.