There are many publishing companies who are willing to take fiction submissions without requiring an agent. Almost all of them are small companies, but many of them do quite well. Here are ten Christian fiction publishers that have a good reputation and are traditional publishers. Click on the name of the company for the link to their submission requirements.
Pelican Book Group (mostly sweet romance)
Write Integrity Press (mystery, suspense, romantic suspense, women’s fiction)
Desert Breeze (variety of genres in full length and novellas)
Enclave (Christian science fiction and fantasy)
White Fire Publishing (all Christian genres)