kmongo VS MapDB

Compare kmongo vs MapDB and see what are their differences.


[deprecated] KMongo - a Kotlin toolkit for Mongo (by Litote)


MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine. (by jankotek)
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kmongo MapDB
2 5
789 4,774
-0.3% -
0.0 0.0
24 days ago 3 months ago
Kotlin Java
Apache License 2.0 Apache License 2.0
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.


Posts with mentions or reviews of kmongo. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-10-28.


Posts with mentions or reviews of MapDB. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-10-27.
  • GC, hands off my data!
    6 projects | | 27 Oct 2023
    I decided to start with an overview of what open-source options are currently available. When it comes to the implementation of the on-heap cache mechanism, the options are numerous – there is well known: guava, ehcache, caffeine and many other solutions. However, when I began researching cache mechanisms offering the possibility of storing data outside GC control, I found out that there are very few solutions left. Out of the popular ones, only Terracotta is supported. It seems that this is a very niche solution and we do not have many options to choose from. In terms of less-known projects, I came across Chronicle-Map, MapDB and OHC. I chose the last one because it was created as part of the Cassandra project, which I had some experience with and was curious about how this component worked:
  • Permazen: Language-natural persistence to KV stores
    6 projects | | 19 Sep 2023
    So, it's an object database, like Zope's ZODB on Python?

    I like the idea, but I'd like to learn about use cases for it.

    Otherwise, in Java, MapDB is about as far as I'd be willing to go:

  • what is the best persistent collection library?
    5 projects | /r/java | 2 Sep 2022
    Anyway, without further ado, I found MapDB ( which does exactly that. Of course, they also provide their own Java collection implementations as well, so I suspect using it with Vavr would be a poor idea, but it is very cool in its own right anyway. Of course, there is also Apache Derby and HSQLDB, and those great options with a long history as well. I haven't played with these in a while though, so I might give them a try again soon for some personal stuff.
  • Ask HN: What are the best key-value self-hosted storage engines?
    5 projects | | 31 Mar 2022
    In Java I like

    It is more feature rich than you want but in Python I'd probably just use sqlite3 since it is in the standard library.

  • Solution for hash-map with >100M values
    7 projects | /r/java | 21 Dec 2020
    I have had good results with mapdb

What are some alternatives?

When comparing kmongo and MapDB you can also consider the following projects:

Chronicle Map - Replicate your Key Value Store across your network, with consistency, persistance and performance.

H2 - H2 is an embeddable RDBMS written in Java.

JetBrains Xodus - Transactional schema-less embedded database used by JetBrains YouTrack and JetBrains Hub.

Redisson - Redisson - Easy Redis Java client with features of In-Memory Data Grid. Sync/Async/RxJava/Reactive API. Over 50 Redis based Java objects and services: Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Spring Cache, Tomcat, Scheduler, JCache API, Hibernate, RPC, local cache ...

Jedis - Redis Java client

Exposed - Kotlin SQL Framework

SQLDelight - SQLDelight - Generates typesafe Kotlin APIs from SQL

kotlin-jpa-specification-dsl - This library provides a fluent DSL for querying spring data JPA repositories using spring data Specifications (i.e. the JPA Criteria API), without boilerplate code or a generated metamodel.

DBFlow - A blazing fast, powerful, and very simple ORM android database library that writes database code for you.

Ktorm - A lightweight ORM framework for Kotlin with strong-typed SQL DSL and sequence APIs.

kotliquery - A handy Database access library in Kotlin