LevelDB is a fast key-value storage library written at Google that provides an ordered mapping from string keys to string values.
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H2 is an embeddable RDBMS written in Java.
Lightweight and blazing fast key-value database written in pure Dart.
A simple, fast, embeddable, persistent key/value store written in pure Go. It supports fully serializable transactions and many data structures such as list, set, sorted set.
The AI-Native Search Database. Best for agent storage, it unifies vector, text, structured, and semi-structured data into a single engine. This all-in-one database makes agents smarter, easier to run, and more stable.
- mysql
- embedded-database
- ai-agents
- copy-on-write
🗻 Log-structured, embeddable key-value storage engine written in Rust
- database
- lsm
- lsm-tree
- lsmt
A tiny KV storage based on skiplist written in C++ language| 使用C++开发，基于跳表实现的轻量级键值数据库🔥🔥 🚀
Embedded key-value store for read-heavy workloads written in Go
- go
- key-value
- hash-table
- key-value-store
SirixDB is an an embeddable, bitemporal, append-only database system and event store, storing immutable lightweight snapshots. It keeps the full history of each resource. Every commit stores a space-efficient snapshot through structural sharing. It is log-structured and never overwrites data. SirixDB uses a novel page-level versioning approach.
- xquery
- java
- temporal-data
- storage
Nornicdb is a distributed low-latency, Graph+Vector, Temporal MVCC with all sub-ms HNSW search, graph traversal, and writes. Using Neo4j Bolt/Cypher and qdrant's gRPC means you can switch with no changes while adding intelligent features like schemas, managed embeddings, reranking+llm, GPU accel, Auto-TLP, Policy-based Memory Decay, and MCP server.
- bolt
- cypher
- database
- enterprise-solutions
A lightweight document-oriented NoSQL database written in pure Golang.
- nosql-database
- document-oriented-database
- golang
- json
High-performance write & space optimized transactional storage engine.
- storage-engine
- c-library
- database
- lsm-tree
A small, fast, in-browser database engine written in JavaScript.
Super lightweight DB written in Swift.
- pencil
- complex-values
- enum
- swift
A document database written in Clojure
Embedded single file SQL database written in Golang