Which database and technology stack for analytics should you choose?

Question

big data

There is a task to develop a project - an analogue of sensortower.com, appannie.com
Every day, data is collected on more than 2 million mobile applications from google play (images, description, rating), reviews, positions in tops, positions in search, information about user activity (installed applications, likes). Changes.
Prompt databases or technology stack for such tasks.

Answer 1

postgres is must, but it makes sense to look at vertical databases, HPVertica, for example
queues - you can also use the classics, RabbitMQ i.e.
language - any of the grown-ups (Java, Net, Python, Go, Node) that a cohesive team uses, not PHP, of course

Answer 2

Yandex ClickHouse