Firebase - How many databases can be created? -

is there limit number of databases created in firebase. each database have it's own login , security credentials keep data separate.

https://xyz_customer_one.firebaseio.com https://xyz_customer_two.firebaseio.com https://xyz_customer_three.firebaseio.com      . . . https://xyz_customer_one_million.firebaseio.com 

you can have 10 firebases on free plan. there no limit on number of paid firebases.