Flask-SQLAlchemy is a thin layer over SQLAlchemy, so the risk of leakage is low. That said, what I don't like is that it's too coupled with Flask, so I prefer t

Flask-SQLAlchemy is a thin layer over SQLAlchemy, so the risk of leakage is low. That said, what I don't like is that it's too coupled with Flask, so I prefer to use my own version: https://github.com/lucuma/orm https://github.com/lucuma/orm