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Neo4j vs PostgreSQL

Neo4j logo

Neo4j

Software

The world's leading graph database

From
Free
Rated
-
Full reviewWebsite
PostgreSQL logo

PostgreSQL

Software

The world's most advanced open source relational database

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Neo4j auraDB Free has no service availability SLA, no backups and no point-in-time recovery; PostgreSQL requires manual scaling across multiple machines for very large deployments
  • They diverge on capability: Neo4j covers Native Graph Storage, PostgreSQL covers ACID Compliance.

Where they differ

Only the attributes on which Neo4j and PostgreSQL actually diverge.

Attributes where Neo4j and PostgreSQL differ
AttributeNeo4jPostgreSQL
Pricing modelfreemiumUnknown
PlatformsLinux, Windows, Mac, Docker, WebLinux, Windows, macOS, BSD, Unix
Founded20071996

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Unknown).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Neo4j

  • Native Graph Storage
  • Cypher Query Language
  • ACID Transactions
  • High Availability
  • Graph Data Science
  • Native Indexes
  • GraphQL
  • Spring Data

Only in PostgreSQL

  • ACID Compliance
  • JSON/JSONB Support
  • Extensibility
  • Advanced Indexing
  • Partitioning
  • Replication
  • pgAdmin
  • DBeaver

Both cover

  • Full-text Search
  • Linux support
  • Windows support
  • Mac support
  • Docker support

What people use each for

The jobs each tool is most often brought in to do.

Neo4j

  • Running a managed graph database on AWS, Azure or Google Cloudnot PostgreSQL
  • Building knowledge graphs and GraphRAG retrieval for AI applicationsnot PostgreSQL
  • Fraud detection, recommendations and supply chain analysis over connected datanot PostgreSQL

PostgreSQL

  • Transaction processingnot Neo4j
  • Data storagenot Neo4j
  • Application backendnot Neo4j
  • Reportingnot Neo4j
  • Data analyticsnot Neo4j

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Neo4j

  • AuraDB Free has no service availability SLA, no backups and no point-in-time recovery
  • AuraDB Free imposes limits on node and relationship counts and runs single-zone only
  • SSO authentication and role-based access control are excluded from AuraDB Free and AuraDB Professional, starting only at Business Critical at $146 per GB per month with a 2GB minimum cluster
  • AuraDB Professional starts at $65 per GB per month with a minimum 1GB cluster and caps at 128GB memory per instance
  • AuraDB Professional backups are daily with only 7-day retention, against 30 days on Business Critical
  • Customer managed keys and private endpoints are available only on AuraDB Virtual Dedicated Cloud, which is quote only with no published price
  • Change data capture, query log forwarding, secondaries and access to Neo4j Professional Services are excluded below the Business Critical tier
  • Support on AuraDB Free is community only and AuraDB Professional is best effort, with 24x7 one-hour response starting at Business Critical
  • AuraDB Virtual Dedicated Cloud is sold on prepaid contract terms with enterprise commercial negotiation rather than self-serve card payment

PostgreSQL

  • Requires manual scaling across multiple machines for very large deployments
  • Performance tuning requires deep knowledge of database internals
  • No built-in graphical admin interface; command-line tools are primary method

Pricing, plan by plan

Neo4j

Free
  • CommunityFree
    • Single database
    • Cypher queries
    • APOC library
  • AuraDB FreeFree
    • 50K nodes
    • 175K relationships
    • Cloud hosted
  • AuraDB Professional$65/month
    • Dedicated instance
    • Auto-scaling
    • Enterprise support

PostgreSQL

Free

No published plan breakdown. See the PostgreSQL review.

Which should you pick?

Choose Neo4j if

  • You need native graph storage.
  • You want to start without paying.
  • You work on Linux, Windows, Mac, Docker, Web.
  • You also want cypher query language.
Neo4j review

Choose PostgreSQL if

  • You need acid compliance.
  • You want to start without paying.
  • You work on Linux, Windows, macOS, BSD, Unix.
  • You also want json/jsonb support.
PostgreSQL review

Questions people ask

Is Neo4j or PostgreSQL better?
Neither clearly leads. Neo4j starts at Free and PostgreSQL at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Neo4j or PostgreSQL?
Neo4j starts at Free and PostgreSQL at Free.
Does Neo4j or PostgreSQL run on more platforms?
Neo4j runs on Linux, Windows, Mac, Docker, Web. PostgreSQL runs on Linux, Windows, macOS, BSD, Unix.
Can I use Neo4j for free?
Both have a free tier, so you can try either at no cost before committing.
What is Neo4j best used for?
Neo4j is most often used for running a managed graph database on aws, azure or google cloud, building knowledge graphs and graphrag retrieval for ai applications, fraud detection, recommendations and supply chain analysis over connected data. Of those, running a managed graph database on aws, azure or google cloud and building knowledge graphs and graphrag retrieval for ai applications are not what PostgreSQL is typically brought in for.
What can Neo4j do that PostgreSQL cannot?
Neo4j covers Native Graph Storage, Cypher Query Language, ACID Transactions, High Availability. PostgreSQL covers ACID Compliance, JSON/JSONB Support, Extensibility, Advanced Indexing. Both handle Full-text Search, Linux support, Windows support, Mac support.

Answered from the vendors’ own pages

PostgreSQL: Is PostgreSQL completely free?

Yes. PostgreSQL is completely free and open source with no licensing fees or restrictions on use.

Source
PostgreSQL: What platforms does PostgreSQL run on?

PostgreSQL runs on all major operating systems including Linux, Windows, macOS, BSD, and commercial Unix variants, and has been proven highly scalable managing terabytes to petabytes of data.

Source
PostgreSQL: What procedural languages are supported?

PostgreSQL supports stored functions and procedures in multiple languages including PL/pgSQL, Perl, Python, Tcl, Java, JavaScript, R, and Rust.

Source
PostgreSQL: What is ACID compliance in PostgreSQL?

PostgreSQL has been ACID-compliant since 2001, ensuring data integrity through atomicity, consistency, isolation, and durability guarantees for all transactions.

Source
PostgreSQL: Does PostgreSQL support JSON data?

Yes. PostgreSQL supports JSON and JSONB data types for storing and querying JSON documents, along with XML and other document formats.

Source
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