These guys wrote the most popular Ruby on Rails multitenant gem and eventually moved away from it: https://influitive.io/our-multi-tenancy-journey-with-postgre

These guys wrote the most popular Ruby on Rails multitenant gem and eventually moved away from it: https://influitive.io/our-multi-tenancy-journey-with-postgres-schemas-and-apartment-6ecda151a21f https://influitive.io/our-multi-tenancy-journey-with-postgre... Some things were mistakes but others look like pretty fundamental flaws. Performance is a problem, database changes are a problem, and you aren't able to query across tenants.