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Nucleus

Paid#29 of 36 in AI Knowledge Base Software

Nucleus: A source-grounded knowledge layer with per-claim verification and MCP connections. Ranked #29 of 36 in AI Knowledge Base Software by our editors (6.4/10); pricing: Pricing on request; best for teams prioritizing claim-level verification.

6.4/10Editor score

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Nucleus6.4 Visit Nucleus

At a glance

Editor score
6.4 / 10
Pricing
Pricing on request
Best for
Teams prioritizing claim-level verification
AI answer mode
Both
Facts checked
24 Sep 2026

Where it wins
- Checks individual claims against source documents with attribution
- Combines semantic and keyword search with a knowledge graph
- Connects AI tools through OAuth 2.0 MCP connectors and a REST API
Where it doesn't
- Pricing requires contacting sales for commercial tiers
- A broad ingestion and integration setup may exceed simpler knowledge-base needs
- Support is limited to email

Our verdict on Nucleus

Nucleus is an AI knowledge infrastructure platform for teams that need AI answers tied back to source material. It ingests PDFs, Gmail, Google Drive and web URLs, then makes that content available through search and conversational chat. The standout fit is for teams prioritizing claim-level verification: Nucleus checks claims against sources and provides attribution, rather than presenting grounded chat alone. Small, mid-market and enterprise teams are listed as fits, though teams seeking a simple static knowledge base may find its wider infrastructure scope unnecessary.

The product combines hybrid semantic and keyword search with a knowledge graph that extracts entities and relationships. That offers two ways to navigate ingested information: retrieve relevant content and connect concepts across it. Role-based workspace permissions, document version tracking and audit trails address access and change history. Nucleus also connects with Google Drive, Gmail, Slack, Notion, PostHog and Linear, alongside ChatGPT, Claude, Gemini, Cursor and MCP-compatible tools. The mix suits teams working across documents and AI applications; evaluating permission boundaries and connector needs should be part of deciding whether it fits.

Nucleus is available as a cloud product with web and API access. MCP connectors use OAuth 2.0, while the REST API covers verification, search and document management. The vendor presents it as beta and free to start, but commercial tiers are described in the terms and enterprise inquiries go through sales; according to the vendor's pricing information, there are no published paid-plan amounts. GDPR and two-factor authentication are listed, and support is by email. Choose Nucleus if claim verification and connected knowledge access are central requirements. Teams that need clear published plan pricing or a narrower, straightforward knowledge repository should consider alternatives.

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Nucleus pricing

Plans Pricing on requestPaid No free plan — trial or paid only. Prices checked 24 Sep 2026.

See plans on nucleus.ae

Nucleus fact sheet

Free plan	Not verified
Paid from	Not verified
AI answer mode	Both
Source connectors	Not verified
Permission controls	Role_based
Content sync	Not verified
Supported content	Documents_apps_and_web
Included users	Not verified
Deployment	Cloud
Platforms	Web
Compliance & security	GDPR, 2FA
Support	Email
Built for	Small business, Mid-market, Enterprise (editorial estimate)
Integrations	11 integrations: ChatGPT, Claude, Gemini, Cursor, Google Drive, Gmail …
Pricing	Pricing on request
Website	nucleus.ae
Facts checked	24 Sep 2026

Nucleus integrations

Nucleus lists 11 integrations on its own site.

ChatGPT
Claude
Gemini
Cursor
Google Drive
Gmail
Slack
Notion
PostHog
Linear
MCP-compatible tools

Alternatives to Nucleus

See all Nucleus alternatives →

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Featured on iTechGuides

Nucleus is listed in our AI Knowledge Base Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update