MongoDB vs. Redis Comparison: Pros And Cons

Having conceptually opposing storage strategies—in-memory vs. on-disk—Redis and MongoDB can serve different purposes in a system. Redis is best suited for querying real-time data when durability and consistency aren’t relevant. MongoDB is a general-purpose database solution that can also be effectively used as an in-memory store.

MongoDB can be optimized for intensive data access and uses cache mechanisms to achieve in-memory database performance. With that said, MongoDB can support real-time data access for most modern applications.

Redis can be used as a cache, message broker, or session manager together with a persistent storage database such as MongoDB.