Mantle
Data room · confidential
Wrong passphrase.

If you don't have a passphrase, this room isn't meant for you yet. Reach michael@mantle.house.

Mantle Data room · Jul 2026

Confidential · personal project · model-shape

The data room.

Mantle is the transaction workspace for top-producing listing agents — the stretch between accepted offer and close where the deal actually breaks. Deadline and contingency tracking across a book of live deals. A live closing-readiness grid. The hard client message, drafted in the agent's own voice. Underneath, a document layer classified by leak damage — the compliance file that lets the brokerage standardize on Mantle later.

Phase · 0 · validation Stance · pre-raise Cadence · founder-solo · in-region Region · Westchester / lower Fairfield

§ 1 · How to read this room

Start with the book, then the plan.

This room is organized around the two canonical documents — the book (the thesis) and the plan (the execution). Everything else supports one or the other. The book argues why Mantle should exist. The plan says what happens in what order and how we know it is working. When the two disagree, the plan is the operating truth.

Start The book Thesis, wedge, three compliances, GTM, seven research tracks. The canonical volume.
Then The plan Four gated phases, R1–R7 backbone, build order, land-and-expand, next 90 days.
Optional The landscape R6 in operational form. Where the occupied category leaves a wedge open.
If curious The product Plain-terms walkthrough of what Mantle is and how it runs across a working day.

Reading time end-to-end: about 90 minutes. Reading time for the book alone: about 30. The rest is reference — dip as needed.

§ 2 · Where the project is

State of play, honest.

The plan is validation-gated. No phase begins until the prior gate clears. No production build until R1, R4, and R5 come back green. No numbers until R3 measures real willingness to pay. The public state is precise.

R1 · wedge pain
Pending
6–8 ride-alongs with in-region top producers. Answers whether closing-readiness is a top-three pain or a nice-to-have.
R4 · compliance file
Pending
5–10 brokerage compliance-officer conversations plus 1–2 E&O underwriters. Answers whether an AI-generated file is acceptable.
R5 · voice bootstrap
Pending
Technical spike on one willing agent. Blind-test drafts against real writing. Answers the moat.
R6 · category teardown
Done (Jul 2026)
Ten competitors mapped. Nobody has all three of grid + voice + sensitivity. See the landscape.
Team
Founder solo
First engineering hire gated to Phase 0 exit plus committed design partners. Advisor bench forming.
Capital
Bootstrapped
Optional small pre-seed after R1 and R4 clear, with committed design partners on the sheet. Milestone-gated, not calendar-gated.

§ 3 · The full index

Every document in the room.

Narrative & thesis

  • Canonical volume HTML
    The book
    The deal-room thesis end to end — the wedge, the three compliances, the GTM, the competitive landscape, and the seven research tracks that prove or kill it. The canonical volume for the project.
    →

Operating

  • Operating plan HTML
    The plan
    The execution counterpart to the book: four validation-gated phases, R1–R7 research backbone, build order, land-and-expand motion, next 90 days. Model-shape, no invented numbers.
    →
  • Plain source MD
    The plan · source
    Raw markdown of the operating plan. For side-by-side reference or export.
    →

Market

  • R6 · competitive teardown HTML
    The landscape
    Ten competitors mapped across four rings. Feature matrix, positioning analysis, threat scores, and the six-point readiness test. Answers where the occupied category leaves the wedge open and what has to be true to keep it.
    →
  • Plain source MD
    The landscape · source
    Raw markdown of the landscape brief. Includes source URLs for every competitor claim.
    →

Product

  • Plain terms HTML
    The product
    What Mantle is, part by part: tracking, closing-readiness, and communication in the agent's voice. The boundaries, the document layer, and how it runs across a working day.
    →
  • The surface HTML
    Dealroom design
    Feature design for the transaction surface: deal dashboard, single-deal timeline, voice-profiled seller updates, compliance pre-flight, and the broker file. Five screens.
    →
  • Reference HTML
    Document matrix
    Every document in a transaction scored on access, exploitability, and breach risk: the map of where Mantle must be careful, and where the agent's inbox is the weak link. 23 documents, NY/CT.
    →

Domain reference

  • Working model MD
    Transaction model
    The internal data model for a real-estate transaction: parties, contingencies, deadlines, documents, events. What Mantle stores and reasons over.
    →
  • Domain reference MD
    Seller-side process
    The seller's-point-of-view real-estate transaction reference — the process Mantle sits on top of. Used to sanity-check the wedge scope.
    →
  • Domain reference PDF
    Seller process · PDF
    Attorney-facing seller-process reference. Sourced primary material for the wedge scope.
    →
  • Domain reference PDF
    Transaction flowchart
    Attorney-state closing flowchart. Deadline sequence, party dependencies, contingency waterfall — the paper the plan builds on.
    →

§ 4 · About

Who is running this.

Michael D'Agostino

Founder · Mantle

Applied mathematician (Columbia, IEOR focus), currently Chief of Staff to the CEO at PubKey — a hospitality, media, and events company operating across New York and Washington DC. Route into real estate is the seller side of the transaction, personal reach into top producers in Westchester and lower Fairfield, and a habit of building information architecture around problems that operators feel weekly. Mantle is a personal project, model-shape, run in the open with the plan gating the build.

Direct: michael@mantle.house

§ 5 · The ask

What is useful to me now.

This room is not a raise deck. Phase 0 is bootstrapped by design. What is genuinely useful in the next 90 days, in order of how much it moves the plan forward:

  1. Intros to top-producing listing agents in Westchester or lower Fairfield who would sit for a ride-along and a hard conversation about the accepted-offer-to-close stretch. This is R1 and it is the bottleneck.
  2. Intros to brokerage compliance officers at Houlihan Lawrence, Compass, Sotheby's, Julia B. Fee, William Pitt, or their peers. This is R4.
  3. Feedback on the plan, especially the gate structure and the honest kill-criteria. Where is the reasoning thin.
  4. Advisor conversations — real-estate operator angels, proptech pre-seed investors who have seen this category from the outside, and anyone who has walked the compliance-file pitch into a brokerage.

Capital comes after signal, not before. When the ask changes, the room will update.

Confidential · do not redistribute Mantle · July 2026