Memory Alpha is the Star Trek wiki. Similar to Wookieepedia, it provides an in-depth look into the entirety of the canonical Star Trek franchise, currently boasting over 341,000 entries on characters, episodes, actors, locations, events, and other topics. Entries on characters, locations, and events are written in a primarily in-universe style, with background information at the bottom of the article. Articles on episodes, series, actors, and other out-of-universe topics, however, are written from a real-world perspective.
It is considered by fans to be the single most accurate and comprehensive database of Star Trek information anywhere. Several Star Trek novels have referenced it during their writing, as did Simon Pegg while writing the script of Star Trek Beyond.