No, Freemasonry is not a religion, nor is it a substitute for your religion, Masons who treat it as such are mistaken. Freemasonry strongly encourages its members to belong to an established religion, although that is not a requirement for membership (only that a candidate profess a belief in a Supreme Being). Masonry is a fraternal organization that encourages morality and charity and studies philosophy. Actually religion is not to even be discussed at Masonic meetings. Freemasonry offers no sacraments nor does it claim to lead to salvation by any definition.
Freemasonry believes that men of all faiths can dwell together in peace. Freemasonry requires its members to believe in God but will not dictate those beliefs except that they coincide with the teachings of Freemasonry. The teachings of Freemasonry are built on the virtues of Faith, Hope, Charity, Brotherly Love, Relief and Truth. The "search for light" found in Freemasonry is a reference to a quest for knowledge, not salvation.
If you are looking for religion you need to be looking for a church not a fraternity of Brothers.