There are many religions in the Twelve Worlds, besides many non-theistic faith traditions and varieties of rationalist philosophies. There are many more than are listed here, but these cover about 70% of the population of the Alliance.
All Prophets Way to the Singularity
A syncretic transhumanist religion that reveres a variety of ancient and more modern prophets. It predicts a coming future utopia in which technological progress will increase exponentially, freeing humans from the constraints of physical bodies. This seemed distinctly more plausible in past centuries when technology was actually progressing exponentially and centuries of attempts at brain uploading had yielded only inconclusive results.
Because creating explicitly sophisticated general AI is tightly regulated and taboo, practitioners of this religion encounter suspicion in some quarters.
There are many sectarian groups and cults adopting Singularitarian ideas.
Temple of the Builders, Orthodox
A religion which considers the Wormhole Builders as having been a type of angel created by the one ineffable creator God to open the way to the stars.
Schisms in the Temple of the Builders led to the Antimatter Wars. The Temple first broke into the Orthodox and Guardian sects, the latter a radical apocalyptic reinterpretation of the faith violently opposing use of the wormholes and in some cases destroying them with antimatter bombs. The Guardian sect itself later splintered into the Respecters and True Guardians.
Temple of the Builders, Respecter
The Respecters are a denomination of the Temple of the Builders, which forbids traveling through wormholes. (Stricter practitioners also attempt to boycott the economic fruits of interstellar travel.) They split off from the Guardians, agreeing that the use of wormholes is inappropriate for imperfect humans, but they do not approve of destroying wormhole stations as the Guardians did.
Wen Dharma
A non-theistic religion preserving predominantly faith traditions of East Asia.
The Grand Fiqh
A school of Islamic jurisprudence common on Thane. A minor disagreement exists between its two constituent factions - adherents of the larger say their daily prayers according to the local time of the world on which they are currently resident with adjustments to the length of prayers for the day length; those of the smaller say daily prayers on a 24 hour clock, as maintained by chronometers.
Humanism
A philosophical stance emphasizing the value of human life and agency within a rationalistic framework.
Universalist Church
An ecumenical Christian group confessing the Rimward Creed.
Ways of the Force
A religious movement founded in a literal interpretation of one of the ancient 2D epics passed down from Earth in fragmentary form.
Xanism
A pantheistic nature-worshipping religion that emerged in the Dark Age on Susa.