Amazon Neptune Analytics vs Diffbot
Amazon Neptune Analytics vs Diffbot: side-by-side comparison of two knowledge-graph platforms systems — architecture, taxonomy, license, pricing, MCP/A2A support, and direct edges.
Cost & capability
| Amazon Neptune Analytics | Diffbot | |
|---|---|---|
| Cost tier | mid | mid |
Where they differ (9)
Rows where both sides have data and the values disagree — the shortlist of dimensions that actually distinguish these two systems.
| Amazon Neptune Analytics | Diffbot | |
|---|---|---|
| Type | Vector + graph in one managed service | Auto-extracted KG from web crawl |
| Created | 2023-11 | 2008 |
| Pricing | Pay-per-use — billed per m-NCU-hour (1 m-NCU = 1 GB memory plus compute for 1 hour), $0.03 per m-NCU-hour in us-east-1 (16 m-NCU graph = $0.48/hour); paused graphs billed at 10% of compute | Free $0/month (10,000 credits); Startup $299/month (250,000 credits, overage $0.001/credit); Startup Plus $899/month (1,000,000 credits, overage $0.0009/credit); Enterprise custom |
| Funding | searched not found | $12.5M total (Seed + Series A 2016) |
| Backend storage | custom (AWS Neptune managed) | custom |
| API surface | REST, openCypher, Gremlin, SPARQL, SDK: AWS SDKs | REST + GraphQL (DQL Knowledge Graph; Enhance, Extract APIs) |
| Embedding | BYO | locked |
| MCP | yes — official AWS Labs Amazon Neptune MCP server (openCypher queries, schema and status for Neptune Analytics graphs) | yes — official diffbot/diffbot-mcp server (extract, search_web, crawl, entity resolution tools) |
| OpenTelemetry | first-class — CloudWatch / OTel | no first-party OpenTelemetry exporter documented; standard logs/metrics typically available. |
At a glance
| Amazon Neptune Analytics | Diffbot | |
|---|---|---|
| Section | Knowledge-graph platforms | Knowledge-graph platforms |
| Tier | T1 | T1 |
| Type | Vector + graph in one managed service | Auto-extracted KG from web crawl |
| Created | 2023-11 | 2008 |
| Pricing | Pay-per-use — billed per m-NCU-hour (1 m-NCU = 1 GB memory plus compute for 1 hour), $0.03 per m-NCU-hour in us-east-1 (16 m-NCU graph = $0.48/hour); paused graphs billed at 10% of compute | Free $0/month (10,000 credits); Startup $299/month (250,000 credits, overage $0.001/credit); Startup Plus $899/month (1,000,000 credits, overage $0.0009/credit); Enterprise custom |
| Funding | searched not found | $12.5M total (Seed + Series A 2016) |
| Backend storage | custom (AWS Neptune managed) | custom |
| Deployment | Managed-only | Managed-only |
| API surface | REST, openCypher, Gremlin, SPARQL, SDK: AWS SDKs | REST + GraphQL (DQL Knowledge Graph; Enhance, Extract APIs) |
| Embedding | BYO | locked |
| Multi-tenancy | hard-isolation | hard-isolation |
| MCP | yes — official AWS Labs Amazon Neptune MCP server (openCypher queries, schema and status for Neptune Analytics graphs) | yes — official diffbot/diffbot-mcp server (extract, search_web, crawl, entity resolution tools) |
| A2A | no Google A2A (Agent2Agent) integration documented as of 2026-05. | no Google A2A (Agent2Agent) integration documented as of 2026-05. |
| OpenTelemetry | first-class — CloudWatch / OTel | no first-party OpenTelemetry exporter documented; standard logs/metrics typically available. |
| Optimised for | relationship modeling + reasoning + governance over pure vector | relationship modeling + reasoning + governance over pure vector |
| Anti-fit | not for purely-vector or simple-RAG use cases (graph adds setup cost) | not for purely-vector or simple-RAG use cases (graph adds setup cost) |
Pros & cons
Amazon Neptune Analytics
Pros: Managed graph database with vector + graph hybrid for AWS-native architectures; first-class integration with Bedrock and SageMaker.
Cons: AWS-only; vector + graph hybrid is newer than dedicated competitors; pricing complexity around graph queries.
Diffbot
Pros: Pre-built knowledge graph of the web (KGoW) — you don't build the graph, you query someone else's; saves enormous extraction cost.
Cons: Quality is bounded by Diffbot's extraction; no schema control; not appropriate for proprietary internal data.