Document intelligence for foundersv0.1 · private beta

The Cursor forbusiness documents.

An AI agent that drafts your board memos, investor updates, and SOPs in your voice — and quietly flags every number that doesn't match the rest of your workspace.

Open appSee how it works
DraftsBoard · Investor · SOP
ChecksCross-doc consistency
TrailDecision log, by default
What it does

Three quiet superpowers,
working in the background.

Rontzen isn't another doc editor. It's a workspace that knows what you've already written and won't let you contradict yourself.

01Agentic editor

Draft like Cursor.

Inline edits, agent suggestions, and autocomplete that actually understands fundraising prose. Tab to accept. Cmd-K to ask. Your voice, kept intact.

Surface
Tiptap rich editor
Agent
LangGraph workspace agent
Latency
Streamed, sentence-by-sentence
02Cross-document intelligence

Numbers that agree.

ARR in the deck doesn’t match the board memo. Burn in the SOP contradicts the investor update. Rontzen reads every doc, every claim, and flags the conflict before your investors do.

Scan
Workspace-wide consistency
Surface
Inline pill, hover diff
Resolve
One-click patch across docs
03Decision log

An audit trail, by default.

Every metric edit, every claim, every approval — captured automatically. When the auditor, the lawyer, or the next analyst asks why the number changed, the answer is already written.

Capture
Per-claim provenance
Export
CSV · JSON · diff bundle
Scope
Workspace + per doc
Live in the editor

It catches the contradictions
you would have missed.

You write a number. Rontzen checks every other doc in your workspace. If something disagrees, a quiet flag appears in the margin — with the diff, the source, and a one-click patch.

  • Source-grounded. Every flag links back to the deck, memo, or sheet it came from.
  • Quiet by default. No popups. No interruptions. The editor stays out of your way.
  • Patchable. Accept the fix here, or push it across every doc that referenced the old number.
How it works

Three moves, in order.
That's the whole product.

  1. 01

    Drop your workspace in.

    Decks, memos, SOPs, sheets. Rontzen indexes every claim, every metric, every footnote. Your private corpus stays in your Supabase.

    • series-b-deck.pdf
    • board-memo-q3.docx
    • sop-revenue.md
    • investor-update-v3.docx
  2. 02

    Draft with the agent.

    Ask for a board memo. Ask to tighten the narrative. Ask to refute an investor question. The agent pulls only from your numbers.

    • draft a Q3 board memo
    • tighten the SOP intro
    • add a churn callout
  3. 03

    Ship with confidence.

    Every claim is grounded. Every conflict is flagged. Every change is logged. Approve, export, send.

    • 1 conflict resolved
    • 2 claims patched
    • audit log: 14 entries
Editorial · 01on the cost of inconsistent prose
Most docs lie quietly. A metric changes in one place and not the others. A claim gets softer with every rewrite. Rontzen reads the room, not just the page.
— Rontzen, design notes
Private beta · founders only

Stop reconciling spreadsheets.
Start writing the truth.

Bring your workspace. Draft your next board memo with the agent. Watch every contradiction surface itself.

Open the workspaceSign in