5 stacked products
![Slack](https://ph-files.imgix.net/2f06cf02-5fa1-4b17-8246-8b4499d50e33.jpeg?auto=compress&codec=mozjpeg&cs=strip&auto=format&w=80&h=80&fit=crop&frame=1)
Slack
Team communication and collaboration platform
stacked 9mo ago
from
![Gmail](https://ph-files.imgix.net/9c9c3c45-376a-412b-87b6-417f99929bc2.jpeg?auto=compress&codec=mozjpeg&cs=strip&auto=format&w=80&h=80&fit=crop&frame=1)
Gmail
World's #1 free email service.
stacked 9mo ago
PostHog
The open source product OS
stacked 9mo ago
![Firebase](https://ph-files.imgix.net/cd6a3077-007d-4d68-a516-c8414b11bec8.png?auto=compress&codec=mozjpeg&cs=strip&auto=format&w=80&h=80&fit=crop&frame=1)
Firebase
An app development platform backed by Google
stacked 9mo ago