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Dev tools · alternatives · 2026

24 alternatives to Zu – A minimalist key-value database engine for modern applications

A minimalist key-value database engine for modern applications - 539hex/zu

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

  1. 1

    We're building a different kind of JavaScript engine, based on data-oriented design and willingness to try something quite out of left field. This is most concretely visible in our major architectural choices: 1. All data allocated on the JavaScript heap is placed into a type-specific vector. Numbers go into the numbers vector, strings into the strings vector, and so on. 2. All heap references are type-discriminated indexes: A heap number is identified by its discriminant value and the index to which it points to in the numbers vector. 3. Objects are also split up into object kind -specific…

    2024 · github.com · its alternatives →

  2. 2
    KeyVal▲87

    Free and simple key-value database

    2021 · keyval.org · its alternatives →

  3. 3
    ZeroDB▲119

    An open-source, end-to-end encrypted database protocol

    2015 · zerodb.io · its alternatives →

  4. 4

    Long-simmering side project that is finally ready to see the light. HAMTs are a cool persistent data structure and implementing one has been a lot of fun. Beyond the code, there is likely some value in the extensive and largely complete implementation docs; basic benchmarks are linked in the README, too. Kind of aiming to be "the libavl for HAMTs". That is obviously a high and aspirational bar but a distinct possibility if it stirs up a little interest and/or contribution. Anyways, it's time for this to go out, collect feedback and maybe even some use outside of toy projects. Let me…

    2023 · github.com · its alternatives →

  5. 5

    A look at modern database approaches and how Citus scales PG

    2016 · softwareengineeringdaily.com · its alternatives →

  6. 6

    See what it’s like to program in a language without null.

    2015 · books.thoughtbot.com · its alternatives →

  7. 7

    A guide to functional programming

    2016 · amazon.com · its alternatives →

  8. 8

    IronDB is now ImmortalDB: https://github.com/gruns/ImmortalDB - gruns/irondb

    2018 · github.com · its alternatives →

  9. 9BA
  10. 10KA

    Hello HN! Today, we are pleased to publicly release Kùzu: a new embeddable graph database management system under a permissible license. You can see our blog post in the above link that gives an overview of the system and our goals/vision. The system is in its early stages but please try it out and give us your feedback, tell us your feature requests, and please report bugs!

    2022 · kuzudb.com · its alternatives →

  11. 11GA

    Hello HN! These last few months I've been working on my first open source project: an embedded database written in pure-go. That took me some months, as I had to learn how to deal with such large packages. Until then, all packages I had made were quite small an did not require much. I usually did not have to worry about things like allocation optimization and instance pools until This project. It started when I wanted to make a port of a tool to a TUI environment. I'm actually used to working with TUIs in golang, so that was my language of choice. The tool I wanted to port is written in…

    Feb 2026 · its alternatives →

  12. 12MF
  13. 13

    We're excited to announce the launch of ZenStack V1 after a year of refinement. With ZenStack, we introduce ZModel, a domain-specific language (DSL) that simplifies the definition of data and access rules, bringing it closer to the database level. This eliminates the need for extensive, repetitive coding on the application side. We would love to hear your feedback and opinions on it. Thank you!

    2023 · github.com · its alternatives →

  14. 14

    Hey everyone! I hope you’re all having a great day. Today I’m sharing an experimental open-source project I’ve been working on for the past few months called Wildcat. Wildcat is an embedded persistent storage engine implementing an lsm tree similar to RocksDB and or LevelDB. The motivation for this system was to try to solve the multi-writer bottlenecks that most embedded systems incur. With that, during my journey with storage systems especially the log structured flavour I’ve implemented a lot of interesting optimizations and algorithms in regards to the write and read paths. I hope you…

    2025 · github.com · its alternatives →

  15. 15

    I built tinykv because I kept reaching for simple persistent storage in Rust projects but found existing solutions either too complex (sled) or unmaintained (pickledb). tinykv focuses on simplicity: JSON-based, serde-powered, with optional TTL. Perfect for CLI tools, game saves, config storage. Would appreciate any feedback from the HN community!

    2025 · crates.io · its alternatives →

  16. 16

    A Lightweight Durable HTTP Key-Value Pair Database in C - willemt/pearldb

    2015 · github.com · its alternatives →

  17. 17

    Keyword-free functional language with prototype objects.

    May 2026 · github.com · its alternatives →

  18. 18

    A collection of high-performance data structures for Zig.

    Dec 2025 · github.com · its alternatives →

  19. 19
  20. 20

    Frustrated by the inability to play with semantic search / ANN in Go w/o a heavy-weight external DB, I created this HNSW library. I hope other gophers find it useful.

    2024 · github.com · its alternatives →

  21. 21MF

    Blog post on why I love Xata when building web3 projects

    2022 · guibibeau.com · its alternatives →

  22. 22

    ⚡️ Neuledge streamlines database modeling with clear data entity definitions, customizable validation, and advanced business-logic representation. - neuledge/engine-js

    2023 · github.com · its alternatives →

  23. 23

    A lightweight vanilla Javascript micro-library for making collapsible trees with JSON - MaxLeiter/jsonTree

    2016 · github.com · its alternatives →

  24. 24
    Endb▲8

    Simple key-value database with multi adapter support

    2019 · github.com · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →