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Most buyers should pick PostgreSQL.
Our default pick is PostgreSQL if you want an open-source object-relational database with no published seat or usage limits. Choose Neo4j when your application depends on storing and analyzing relationships as graphs, or using graph analytics and GraphRAG. Neo4j’s Professional pricing starts at $0.09/GB/hour with a 1GB minimum instance. Both offer a free option; PostgreSQL has no listed paid plans.
01Side by side
| Neo4j | PostgreSQL | |
|---|---|---|
| Starting price | Free; paid starts $0.09/GB/hour (1GB minimum) | Free of charge; no paid plans listed |
| Free plan | AuraDB Free; no payment method required | Open-source software; free of charge |
| Best for | Graph databases, analytics, and AI applications | Open-source object-relational database workloads |
| Core strength | Connected data, graph analytics, and GraphRAG | Reliability, performance, and active development |
| Learning curve | Review ease score: 6 | Review ease score: 6.5 |
| Integrations/data | Graph data; Professional on AWS, Azure, Google Cloud | Object-relational data; documentation and community resources |
| Team/seat costs | Capacity billing; no seat price listed | No published seat or usage limits |
| Support | Review support score: 5 | Docs and community resources; review score: 7 |
Neo4j Choose Neo4j if
- Choose Neo4j if graph relationships are central to your application.
- Choose Neo4j if you need graph analytics on connected data.
- Choose Neo4j if GraphRAG is part of your AI workflow.
PostgreSQL Choose PostgreSQL if
- Choose PostgreSQL if you want open-source database software.
- Choose PostgreSQL if you want no published seat or usage limits.
- Choose PostgreSQL if its object-relational model fits your data.
02Pricing compared
PostgreSQL is free, with no paid plans listed and no published seat or usage limits in the published pricing information. Neo4j also has a free option: AuraDB Free costs $0 and requires no payment method, according to the pricing page.
Neo4j’s paid managed plans use hourly capacity pricing, not a fixed monthly or annual rate. AuraDB Professional starts at $0.09 per GB per hour, with a 1GB minimum instance. Business Critical starts at $0.20 per GB per hour, with a 2GB minimum. Virtual Dedicated Cloud pricing is custom. Those rates make workload size and runtime central to the cost comparison; a monthly total is not published. Choose PostgreSQL for a free database license. Choose Neo4j when graph-specific capabilities justify its metered service cost.
03Features and depth
The main difference is the data model. PostgreSQL is an open-source object-relational database system; Neo4j is built to store and analyze connected data as graphs. They are not direct substitutes for every workload, so compare them against the shape of your data and the queries your application needs.
Neo4j’s feature set is centered on relationships: its platform supports knowledge graphs, graph analytics and graph data science, and GraphRAG for retrieving context from connected data for AI systems. Its homepage lists fully managed and self-managed products. The pricing page also lists managed AuraDB options, from free through custom-priced dedicated infrastructure.
PostgreSQL’s published feature information emphasizes its open-source model, reliability, performance and more than 35 years of active development. Official documentation and community resources cover learning and use. It does not list graph analytics or GraphRAG among the published features. If relationship analysis is a core requirement, Neo4j has the clearer fit; if you need an object-relational database, PostgreSQL is the more direct match.
04Ease of use and learning curve
Neither product is automatically easier; the better fit depends on the model your team already understands. PostgreSQL has official documentation and community resources for installing, using and learning the database. The published information does not specify its setup requirements or support response times.
Neo4j’s graph-first approach is a better match when the application revolves around connected data, but teams should account for learning that model and estimating hourly capacity costs. Neo4j offers a free AuraDB option for exploring graphs, with no payment method required, according to its pricing page. That can lower the barrier to evaluation, but it does not establish how easily a production workload will transfer. Before switching, map your existing data and application requirements to the target model.
Questions people ask
Is Neo4j cheaper than PostgreSQL?
Not on the listed software price alone: PostgreSQL is free, and Neo4j has a free AuraDB option. Neo4j’s managed Professional plan starts at $0.09 per GB per hour with a 1GB minimum. Its actual cost depends on capacity and runtime; the pricing page does not publish a fixed monthly total.
Can PostgreSQL replace Neo4j?
That depends on what the application uses. PostgreSQL is an object-relational database; Neo4j is designed to store and analyze connected data as graphs. If graph analytics or GraphRAG is central to the workload, the published feature information points to Neo4j. If not, PostgreSQL may be the more direct fit.
Does Neo4j offer a free plan?
Yes. The pricing page lists AuraDB Free at $0 per month, with no payment method required and access to all graph tools. It is described as being for learning and exploring graphs, so check the paid plan limits before treating it as a production option.
Does PostgreSQL have paid plans?
The published pricing information lists PostgreSQL as free open-source software, with no paid plans and no published seat or usage limits. It does not provide a monthly or annual price. The pricing information is marked low confidence, so verify current terms with the official project before making a purchase decision.