BrethrenPedia is a collaborative online encyclopedia dedicated to documenting the history and beliefs of the Plymouth Brethren and similar New Testament-patterned assemblies. Established as a platform for individuals associated with these churches, BrethrenPedia invites both current and former members to contribute to a wealth of information covering a variety of topics, including church doctrines, notable figures, writings, and historical records.

The site aims to facilitate respectful and well-rounded discourse, encouraging users to explore the richness of Brethren traditions while avoiding division. It provides a user-friendly interface where anyone can access content without a login, although registration is required for editing or contributing. Additionally, BrethrenPedia offers a growing archive of past assembly magazines and other resources for historical research. With a focus on accuracy and community involvement, BrethrenPedia serves as a vital resource for understanding the diverse expressions of faith within the Brethren community and beyond.