CosmoFlow is an open-source Python package designed to compute cosmological correlators, which are crucial for understanding the early universe and probing hidden mathematical structures. The package addresses the technical challenges of perturbative calculations in cosmology, which are often limited by complex differential equations and numerical integrals. CosmoFlow follows the cosmological flow approach, which traces the time evolution of correlators from their origin as quantum zero-point fluctuations to the end of inflation. This method is equivalent to the canonical in-in Schwinger--Keldysh formalism and can compute any tree-level two- and three-point correlators in any theory, including those with multiple fields and conjugate momenta. The package is designed to be flexible, user-friendly, and easy to implement, making it accessible to theorists and cosmologists. It can be used to complement analytical computations, provide physical intuition for inflationary theories, and obtain exact results in regimes that are analytically infeasible. CosmoFlow is publicly available on GitHub and aims to facilitate collaborative development and enhancement by the theoretical physics community.CosmoFlow is an open-source Python package designed to compute cosmological correlators, which are crucial for understanding the early universe and probing hidden mathematical structures. The package addresses the technical challenges of perturbative calculations in cosmology, which are often limited by complex differential equations and numerical integrals. CosmoFlow follows the cosmological flow approach, which traces the time evolution of correlators from their origin as quantum zero-point fluctuations to the end of inflation. This method is equivalent to the canonical in-in Schwinger--Keldysh formalism and can compute any tree-level two- and three-point correlators in any theory, including those with multiple fields and conjugate momenta. The package is designed to be flexible, user-friendly, and easy to implement, making it accessible to theorists and cosmologists. It can be used to complement analytical computations, provide physical intuition for inflationary theories, and obtain exact results in regimes that are analytically infeasible. CosmoFlow is publicly available on GitHub and aims to facilitate collaborative development and enhancement by the theoretical physics community.