You can download and install free Community version of MongoDB from the official MongoDB download center.

After installation, make sure MongoDB service is running and accepting connections on default localhost:27017 (change connection parameters in the ./backend/api/.env file if you run on different location/port)

To manage database, you can use free MongoDB Compass Community Edition available or some other GUI for MongoDB, e.g. Studio 3T (https://studio3t.com)

For production, we recommend MongoDB Atlas.
It is also possible to use AWS DocumentDB or Azure Cosmos DB

Note: we currently integrating Mongo Memory Server which will allow to test Platform without need to install MongoDB locally.