Repl DB is a database system for storing JSON-based text, created by Replit Team member Sid. The official ReplDB is not to be confused with Kakashi's repldb. The Node.js client was created by Coder100, to which Masfrost later helped him test with Jest. The Python ReplDB client was originally made by CodeMonkey51, although it no longer works. Later, the Python client was replaced by the official replit module, and the Node.js client was acquired from Coder100 at the low price of free.