Neo4j

One-line summary: Property-graph database; Community Edition is the only engine with official docs fetched in the seed pass, and those docs themselves point at DIY / small-workgroup use.

What it is

A native property-graph store: labeled nodes, typed directed relationships, properties on both, schema-optional. Queried with Cypher. Self-managed Community (GPLv3) and Enterprise editions, plus hosted Aura. From 2026-08-21-autoresearch-user-owned-interest-graph-youtube-recs.

Why it matters to interest-graph-recs

SCOPE asks for graph-DB options and tradeoffs at personal-app scale. Neo4j is the option with fetched official docs; other engines were search hits only and are not cited here.

Key facts

Property-graph model: nodes, labels, directed typed relationships, properties ([Neo4j getting-started], via 2026-08-21-autoresearch-user-owned-interest-graph-youtube-recs).
Operations Manual (fetched page labeled product version 2026.07): Community is “fully functional,” ACID + Cypher, “ideal for learning Neo4j, do-it-yourself projects, and applications in small workgroups.”
Enterprise adds clustering, online backup, RBAC, multiple user databases — production features, not required for a single-user graph (same source).
Cypher versioning split from the server as of Neo4j 2025.06 (Cypher 5 frozen; Cypher 25 receives new language features) — a compat note, not a rec-quality claim.
Oprea et al. (IEEE Access 2025) use Neo4j + Cypher + Jaccard similarity for e-commerce product recs (customers/products as nodes, purchases as edges). Author-reported “high-quality” recommendations vs the Surprise library. Five citations. From 2026-08-21-academic-research-user-owned-interest-graphs-vs-platform-recs.
Besta et al. (CSUR 2019) include Neo4j in a 51-system graph-DB taxonomy (RDF vs labeled property graph). From the same academic source.

Open questions

Embedded / RDF / SQLite alternatives were not fetched; do not treat this page as a bake-off winner.

Neo4j

Neo4j

What it is

Why it matters to interest-graph-recs

Key facts

Open questions

Sources

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