Which droplet will best fit for the use case of around 25-30k users on the server?

Hi there,

It would really depend on your project and its resource requirements.

I could suggest starting with the following page:

https://docs.digitalocean.com/products/droplets/concepts/choosing-a-plan/

It outlines the difference between the different types of Droplets so you could have enough information to make an educated decision on the type of Droplet that you might need to be based on your project.

After, that I could suggest running some load tests so you could see how much traffic your app is able to handle on your Droplet and find any bottlenecks that pop up:

https://www.digitalocean.com/community/tutorials/an-introduction-to-load-testing

For example, the load test might indicate some MySQL issues, so you could then focus on MySQL and tweak your MySQL instance for better performance:

https://www.digitalocean.com/community/questions/how-to-tweak-mysql-mariadb-configuration-for-increased-performance-and-stability

Hope that this helps!

Best,

Bobby