cerebrus

Private knowledge assistant for your organisation

Everything you wrote down. One answer.

Ask your contracts, policies and reports. Every answer cites the page it came from, and the newest document wins, fact by fact.

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  • Cites the page
  • Newest document wins
  • Encrypted per project

Supplier contracts 2025

Example · fictional documents

Primary key

Google Gemini •••• 4f2a

Live

Fallback key

Anthropic Claude •••• 81d3

Standby

YouWhat notice do we give Northwind to terminate?

Cerebrus

Either party may terminate with 60 days' written notice.

Time Task · provider · key Duration Cost Outcome
09:41:07 SearchVoyage AI •••• 7c10 84 ms €0.0001 served
09:41:08 AnswerGoogle Gemini •••• 4f2a 1,180 ms €0.0004 served

2 calls

AI markup €0.00

Total €0.0005

Served by your primary key. Every call is priced and logged.

What you do with it

Ask. Teach. Correct. Remove.

Every answer shows its source. Every change to what Cerebrus knows is shown to you first.

Answers come only from your project's current documents, with the page behind every claim. If the documents do not say, Cerebrus says so.

Supplier contracts 202514 documents Ready

What notice do we give Northwind to terminate the supply agreement?

Terminate with 60 days' written notice . Invoices are payable within 45 days .

1Northwind amendment no. 2Page 2 of 6

6.2Either party may terminate this Agreement by giving not less than sixty (60) days' written notice.

Type "learn that…" in chat. A card shows what it understood, and whether each statement is new, already known or replaces a value. You confirm, revise or cancel.

Supplier contracts 202514 documents Ready

Learn that Northwind invoices are payable within 60 days, that early payment earns a 2% discount, and that Priya Nair is the account manager.

Here is what I understood

Nothing changes until you confirm.

  • Northwind invoices are payable within 60 days Replaces 45 days From Northwind supply agreement, p. 4
  • Early payment earns a 2% discount New
  • Priya Nair is the Northwind account manager Already known

Upload the newer document. Only the values it contradicts are retired, and the Corrections view shows old next to new.

Supplier contracts 2025Corrections
Northwind amendment no. 2.pdf New upload Reading Ready

  • Termination notice

    CurrentOutdated 30 days
    Current 60 days

  • Liability cap

    CurrentOutdated €1,000,000
    Current €2,000,000

Only these two values retired. The rest of the 2023 agreement still answers, and you never said which version to believe.

Remove a document and see first what changes. The older values it replaced come back.

Supplier contracts 202514 documents

Remove “Northwind amendment no. 2.pdf”?

Here is what changes. Nothing is removed until you confirm.

Older values come back

  • Termination notice

    60 days30 daysCurrent again

    Back from Supply agreement 2023 · p. 7

  • Liability cap

    €2,000,000€1,000,000Current again

    Back from Supply agreement 2023 · p. 9

Latest upload wins

The newest document wins. Fact by fact.

Upload the 2025 amendment and only the values it contradicts retire. The rest of the 2023 agreement keeps answering. You never say which version to believe.

Retired values stay in the history and never reach an answer again. No one acts on a superseded price or policy.

  1. First upload Older values stay as history
  2. Newer upload Contradicted values retire
  3. Newest upload Its values win
The Cerebrus logo, exploded into three stacked uploads. The bottom layer, the newest upload, carries the full-width bar: its values win. 1 2 3

Private by construction

Locked per project. Priced per call.

Cerebrus reads your folders without changing them, keeps every project under its own key, and runs on AI keys your organisation already holds.

  1. Folders, read-only

    Follow a Google Drive or OneDrive folder, including folders shared with you. New and changed files are read, deleted ones removed. Cerebrus never adds, changes or deletes anything there.

  2. One key per project

    Documents, passages, facts and chats are encrypted at rest under the project's own key, protected by a master key kept outside the database. Delete the project and its key is destroyed: the data can never be read again.

  3. Your AI keys, every call priced

    Gemini, OpenAI, Claude or OpenRouter answer; Google, OpenAI, OpenRouter or Voyage AI search. Every call is priced and traced to the project, document and chat that caused it.

The honest limit. Your AI provider still sees the text it is asked to process. That is why the keys are your organisation's, under the terms you already agreed with that provider.

Pricing

Per user. Every feature in every plan.

Plans differ only by capacity. Example prices in euros.

Starter

For a department that wants answers it can trace back to the source.

€29

€24

per user / month

billed €288 per user yearly

or €24 when billed yearly

  • 10 projects per user
  • 25 GB of documents per user
  • 5 synced folders per user
  • Email support
Request an invite

Business

For organisations that run on contracts, policies and reports.

€59

€49

per user / month

billed €588 per user yearly

or €49 when billed yearly

  • Unlimited projects
  • 250 GB of documents per user
  • 50 synced folders per user
  • Priority support and guided onboarding
Request an invite

Enterprise

For large archives and procurement that needs a contract.

Custom

volume pricing, invoiced yearly

 

  • Unlimited projects
  • Storage sized to your archive
  • Unlimited synced folders
  • Dedicated onboarding and support contact
Talk to us

Every plan includes everything

  • Answers only from your documents, with citations
  • Latest upload wins, fact by fact
  • Teach and forget in chat, with confirmation
  • Fact history and reversible removal
  • Deep answers with a calculator
  • Export to PDF, Word, Markdown or text
  • Google Drive and OneDrive folder sync, read-only
  • Per-project encryption keys
  • Files up to 256 MB, ZIPs unpacked
  • Every AI call priced and attributed to its project

Stop searching. Start citing.

Give your organisation answers it can trace to the page. Cerebrus is invite-only: request yours.

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Source

The passage Cerebrus used. Example document, not a real contract.