NationalSecurityAgency/lemongraph

Health v2 · maintenance only

Flags: no_releases no_license

Adoption not part of the score

1200 stars · 164 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

LemonGraph is a log-based transactional graph database engine backed by a single file, built on Symas LMDB with a C core and Python bindings. It provides a query language, REST service, and streaming seed-set expansion via log position bookmarks.

Use cases

• store and query nodes and edges in a transactional graph database
• run streaming seed set expansion over incrementally injected data
• query graph patterns with a built-in query language
• serve graph queries over a REST API
• inspect historical views of the graph at a given log position
• embed a fast single-file graph store in Python applications

When to choose

• you need a lightweight, single-file transactional graph database
• you want incremental streaming ingestion with position bookmarks for repeat queries
• you need historical graph views as of a specific log position
• you want LMDB-backed performance with Python bindings and a REST service

When to avoid

• you need distributed or multi-node graph storage
• you require a rich ecosystem of graph algorithms out of the box
• you need concurrent writers (LMDB allows only a single writer)
• you need a managed or actively developed database with broad community support

Facets

library · maturity maintenance

database search-engine http-server serialization databases graph-processing developer-tools security python cross-platform graph-database lmdb log-structured transactional rest-api single-file-database streaming-analytics linux macos

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markdown · JSON · MCP: product_card(name="NationalSecurityAgency/lemongraph")