Cozo – new Graph DB with Datalog, embedded like SQLite
Hi HN, I have been making this Cozo database since half a year ago, and now it is ready for public release. My initial motivation is that I want a graph database. Lightweight and easy to use, like SQLite. Powerful and performant, like Postgres. I found none of the existing solutions good enough. Deciding to roll my own, I need to choose a query language. I am familiar with Cypher but consider it not much of an improvement over CTE in SQL (Cypher is sometimes notationally more convenient, but not more expressive). I like Gremlin but would prefer something more declarative. Experimentations…
Cozo – new Graph DB with Datalog, embedded like SQLite launched on November 8, 2022 with 425 votes, #33 of 3,471 launches that month and more than 99% of that year's launches. The site was still online in September 2026, 3 years on.
In plain words
Cozo is an embedded graph database designed to be lightweight and accessible like SQLite while offering the power and performance of Postgres. It uses Datalog as its query language, which the creator found more expressive and declarative than alternatives like Cypher or Gremlin. The database targets developers seeking a practical graph database solution without the constraints of property graph models or performance limitations of triple stores.
written from the facts on this page · September 2026
From the sources
A transactional, relational-graph-vector database that uses Datalog for query. The hippocampus for AI! - cozodb/cozo
In the maker’s words, at launch
Hi HN, I have been making this Cozo database since half a year ago, and now it is ready for public release. My initial motivation is that I want a graph database. Lightweight and easy to use, like SQLite. Powerful and performant, like Postgres. I found none of the existing solutions good enough. Deciding to roll my…
Does a similar job
all alternatives →- CHCozoDB, Hybrid Relational-Graph-Vector Database2023 · docs.cozodb.org · ▲137
Hi HN! We're thrilled to share CozoDB v0.6, a monumental update to our FOSS database, which already unifies relational and graph features. With the addition of vector search, CozoDB becomes an even better companion for LLMs like ChatGPT. This release introduces vector search using HNSW indices within Datalog, enabling seamless integration with powerful features such as ad-hoc joins, recursive Datalog, and classical whole-graph algorithms. This update significantly broadens CozoDB's capabilities. Check out the linked release note for an in-depth look at the new features, comparisons to other…
LatticeDB – Like SQLite but for graph databasesAug 2026 · github.com · ▲190We have been using graph DBs more and more at work. I found them painful to work with locally and decided to try and build something better.
Simple-graph – a graph database in SQLite2020 · github.com · ▲237This is a simple graph database in SQLite, inspired by "SQLite as a document database" - dpapathanasiou/simple-graph
Outerbase Studio – Open-Source Database GUI2024 · github.com · ▲356We just launched Outerbase Studio, the open-source version of our core database offering. It works in your browser or as a desktop app and supports MySQL, PostgreSQL, and SQLite. What it does: • Connects to MySQL, PostgreSQL, and SQLite databases. • Spin up local databases directly through the UI, even if you don’t have one running. • Manage and query your data in a lightweight, intuitive interface. • Completely open source. Why we built it: We wanted to share the core Outerbase experience with the developer community as a free, open-source tool. It’s simple, fast, and removes the barriers…
Grafito – Portable, Serverless and Light SQLite-Based Graph Database2021 · github.com · ▲110Portable, Serverless & Lightweight SQLite-based Graph Database in Arturo - drkameleon/grafito
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Source: Show HN post ↗ · launch text quoted in part
Launched alongside, November 2022
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