Nucleus
Nucleus is a knowledge infrastructure layer for collecting information once and making it available across AI tools.
What Nucleus is
Nucleus is a knowledge infrastructure layer for collecting information once and making it available across AI tools. It ingests PDFs, Gmail, Google Drive, and web URLs into a searchable knowledge base. Search combines semantic and keyword methods with entity extraction and a Neo4j knowledge graph. Document chat answers are described as grounded in source documents and accompanied by citations. COVE checks factual claims against the knowledge base, labeling them verified, contradicted, or unverifiable with source attribution. MCP-compatible tools including Claude, ChatGPT, Gemini, and Cursor can connect through OAuth connectors. A REST API covers verification, knowledge-base search, and document management, with read, write, or admin API keys. Workspace and role-based permissions, document versions, and an audit trail are listed. Nucleus offers web and API access, free beta entry, and pricing on request. Beta services may retain data up to 90 days unless ZDR is elected.
Good
- Ingests PDFs, Gmail, Drive, and web URLs
- Combines semantic and keyword search
- Provides cited, source-grounded document answers
- Connects MCP-compatible AI tools
- Offers role-based permissions and audit trails
Watch out
- Pricing is available only on request
- Beta services may retain data up to 90 days
- Beta services are excluded from SLA commitments
Who it suits
Nucleus suits legal, medical, strategic intelligence, venture capital, and financial services teams that need shared, searchable information for AI tools. It also fits developers needing API access and controlled permissions.
Verdict
Nucleus combines broad knowledge ingestion with search, verification, citations, and AI-tool connections. Its beta terms and request-based pricing should be reviewed before adoption.
The facts
Each one read from Nucleus's own pages, with the date it was checked.
What it does
- Access controls
- The knowledge base page lists workspace-level, role-based permissions and document version tracking with a full audit trail.checked 4 Oct 2026
- AI integrations
- Nucleus says MCP-compatible AI tools including Claude, ChatGPT, Gemini, and Cursor can access its knowledge base through OAuth connectors.checked 4 Oct 2026
- Beta limitations
- The terms say beta services are provided as-is without warranties, excluded from SLA commitments, and may retain beta data for up to 90 days unless ZDR is elected.checked 4 Oct 2026
- Data security
- The terms specify AES-256 encryption at rest, TLS 1.3 in transit with TLS 1.2 minimum, and role-based access controls.checked 4 Oct 2026
- Developer access
- The REST API provides access to verification, knowledge-base search, and document management, with API keys that can have read, write, or admin access.checked 4 Oct 2026
- Grounded answers
- Nucleus says its document chat answers are grounded in source documents and include citations.checked 4 Oct 2026
- Intended users
- Nucleus presents use cases for legal, medical, strategic intelligence, venture capital, and financial services teams.checked 4 Oct 2026
- Knowledge sources
- It supports ingesting PDFs, Gmail, Google Drive, and web URLs into a searchable knowledge base.checked 4 Oct 2026
- Product
- Nucleus describes itself as a knowledge infrastructure layer that lets users add information once and make it available across AI tools.checked 4 Oct 2026
- Search and graph
- The knowledge base offers hybrid semantic and keyword search, entity extraction, and a knowledge graph built with Neo4j.checked 4 Oct 2026
- Support
- For Enterprise, the terms list response targets of 1 hour for critical, 4 hours for high, 24 hours for medium, and 72 hours for low priority issues.checked 4 Oct 2026
- Verification
- COVE checks factual claims against a knowledge base and labels them verified, contradicted, or unverifiable, with source attribution.checked 4 Oct 2026
The company
- Company security
- The terms list SOC 2 Type I and II, ISO 27001:2022, ISO/IEC 42001:2023, and configurable HIPAA support with a BAA for eligible services.checked 4 Oct 2026
Money
- Free access
- The homepage says “Free to start” and invites visitors to join the beta; it does not give a price or plan limits there.checked 4 Oct 2026
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