Perseus
Perseus

Graph Layer for AI

The knowledge graphyour AI stack has been missing

Most AI projects stall when they hit the data layer. Unstructured documents, siloed databases, no shared schema. Perseus turns that into a knowledge graph your AI can actually reason over.

L'Oréal
Sia Partners
Neo4j
AWS
Apollo Tyres
L'Oréal
Sia Partners
Neo4j
AWS
Apollo Tyres

From text to knowledge

Each capability is designed to work independently or together, so teams can ship quickly and scale with a reliable graph foundation.

Generate Custom Ontologies

Automatically generate a custom ontology from your source documents to serve as the blueprint for your knowledge graph. Tailor the schema by simply describing your specific business use case, or seamlessly upload and extend your existing ontologies.

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Build Knowledge Graphs

Transform raw documents into a structured semantic network of entities and relationships. Use automated Text-to-Graph pipelines to generate standardized, production-ready knowledge graphs built specifically to power your AI applications.

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Retrieve Connected Context

Extract high-signal entities, relationships, and semantic paths directly from your knowledge graph. Empower your AI applications and agents to reason over deeply connected, structured context rather than isolated fragments of text.

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Builders

Knowledge, structured instantly

Extract entities and relationships from your data with a single call.

graphs = perseus_client.build_graph(
    file_paths=["path/to/your/document.txt"],
)
Edouard T. portrait

Edouard T.

Senior ontologist

Focuses on ontology governance, evolution, and semantic consistency.

Oscar M. portrait

Oscar M.

Graph specialist

Leads ontology design and schema alignment for production knowledge graphs.

Julien P. portrait

Julien P.

Graph researcher

Works on graph extraction quality, retrieval accuracy, and model-driven improvements.

Entreprise

Graph expertise embedded in your team

Building Knowledge Graphs is hard.
Modeling them correctly is even harder: defining the right entities, structuring relationships, and evolving them as the domain changes.
That’s where our knowledge modeling and graph experts work side by side with your team.

Benchmark Results

Reliability
100 %
Entities F1
92 %
Relations F1
74 %
Properties F1
84 %
Latency
33.152 s
Perseus
Claude 4.5 Sonnet - high-thinking - 32768 tokens

How teams build and scale knowledge graphs

From Fortune 500s to fast-moving startups, our customers are building the next generation of AI applications on a foundation of structured knowledge.

Start free, scale with confidence

Launch your first graph-powered agent flow quickly, then scale to enterprise throughput with reliability, support, and infrastructure options designed for production teams.
DevelopREST & Python SDK
ExecuteServerless compute
ScaleEnterprise ready
MonitorConsole & alerts
It is free with no time limit and no credit card required. Fair-use volume limits apply, and you can move to the Platform tier when you need committed capacity or enterprise features.
Perseus builds and maintains the graph by transforming unstructured text into structured knowledge. A graph database (like Neo4j or FalkorDB) stores and queries it. You need both to build a complete GraphRAG system.
Yes. Most Self-serve and Platform customers build their own ontologies using the SDK or our Ontology Builder. Professional services are entirely optional.
Perseus is highly flexible; it can import and extend existing ontologies in OWL, SKOS, or custom formats to ensure your graph generation follows your specific domain rules.
Pricing for the Platform tier is based on workload capacity and committed usage, rather than a simple per-user or per-query model.
We offer Cloud-managed options for Self-serve and Platform users, VPC deployment for Platform users, and On-prem or air-gapped solutions for Enterprise customers.
Yes. Security documentation including our DPA is available on request for Platform tier customers and above.