eMbox
Angel / seed stage

Investor preview · MVP sandbox

Test the protocol before we ship the vault.

This page is a working preview of eMbox — certified digital delivery to a physical address. Click through the live simulation, review unit economics, and download the brief. Patent pending · software MVP in build.

Live prototypeUI sandboxCinematic demoDownload briefs

6

Patent families

18+

Protected claim areas

US

Primary jurisdiction

PCT

International expansion planned

Pre-seed

Raising $500K pre-seed

To fund sender API hardening, first institutional pilot, security audit, and hardware industrial design after software validation.

SAFE (standard YC-style terms — details in data room) · Target close Q3 2026

Use of funds

  • Protocol & sender API engineering45%
  • First design-partner pilot (bank, insurer, or agency)25%
  • Security audit, legal review, compliance docs15%
  • Hardware ID & FCC path (post-software MVP)15%

Legal entity

Entity
eMbox, Inc.
Structure
Delaware C-Corporation
Cap table
eMbox is being incorporated as a standalone Delaware C-Corp — separate from other founder ventures. Cap table and SAFE terms shared under NDA in the investor data room.

Advisory relationships

We are actively recruiting advisors in fintech infrastructure, govtech certified delivery, and postal policy as we enter angel conversations. First named advisors will be announced here.

Fintech & sender onboarding

Recruiting

Institutional API adoption, KMS/HSM practices, B2B GTM

Govtech & statutory notice

Recruiting

Jurisdiction rules, ESIGN/UETA, court-exportable receipts

Aviation & logistics docs

Founder-led

Flight ops, cargo AWB, MRO airworthiness mail pathways

Request data room & founder call

Interactive

UI protocol sandbox

Animated simulation for storytelling. For the real API (encrypt, ledger, affidavit), use the live prototype — not this sandbox.

Open live prototype (real API) →
Sandbox · simulated · no real PII

Sender console

First National Bank

→ 123 Main St, Austin TX

Account Statement — March 2025

Home Vault · serial EMX-7F2A

First National Bank → 123 Main St

Sender hits send

“The bank signs the statement. Your address — not your inbox — is on the envelope.”

First National Bank signs your March statement with its institution key and sends it through the eMbox Certified API. The payload carries a digital address token bound to your home — same legal anchor as certified mail, without printing.

Chain of custody

  • SENT
  • ROUTED
  • SECURED
  • GLANCE
  • RETRIEVED
  • READ
  • PROOF

Payload inspector

Account Statement — March 2025

Sender: First National Bank (verified cert)

Recipient: 123 Main St, Austin TX

Channel: eMbox Certified API — not SMTP

Address token: bound to household vault

Investor (60 seconds)

“Fifty percent of First-Class Mail has disappeared since 2008 — but regulated senders still need address proof.”

Banks, IRS, courts can't use email for legal delivery. They still print because there's no digital receiver tied to your door. eMbox is that receiver — patent-pending vault, sender API, cryptographic receipts. We're not a smart mailbox that reads mail outside. We're infrastructure for certified digital delivery.

Hardware + platform licensing. Paper replacement for institutions that must prove delivery.

Cybersecurity is the moat. AI is the retention layer. Platform is the revenue engine. Together: zero-trust delivery infrastructure for every home with an address.

Market & unit economics

High potential if built as infrastructure, not hardware. The moat is the sender network + address-bound protocol — the box is the anchor.

$40B+

Global postal & document delivery spend annually

Paper, postage, handling, certified mail

130M

US households with a formal street address

1–2% adoption = millions of homes

$10.48+

Cost per USPS certified letter (2026)

Sender ROI at $2–4 digital delivery

0

Home digital receivers for certified official mail

Greenfield category — no incumbent at the door

$10.48+

USPS certified mail (sender cost today)

eMbox target $2.50–$4.00 at scale

$3.49

Sender pay-go (launch pricing)

$1.89/delivery at 10k+/mo volume

$6–9/mo

Consumer founding subscription

Hardware anchor $249 + $9/mo Home Vault

130M

US households with street addresses

1–2% = millions of homes at modest penetration

Gulf infrastructure

Smart-city + government pilots

Qatar MCIT/QCB and KSA ROSHN/DGA sender pilots — certified delivery spec'd into giga-project handover packs and SPL national address binding.

Niche security brand

$10–30M ARR

Privacy-conscious homeowners + regional bank senders. Software-first, limited hardware.

Category leader

$100M+ ARR

Anchor sender (top bank or agency) + national sender network + Home Vault adoption in affluent suburbs.

Delivery infrastructure

Platform-scale

Default certified digital receiver at US addresses — the TLS layer for official mail to the home.

MVP build plan

We can demo the full delivery flow in software within 8–10 weeks. Hardware prototype follows. Legal and sender partnerships run in parallel.

Phase 0

Foundation

Monorepo, protocol schemas, crypto packages (address token, encrypt/sign, ledger)

Exit: Offline payload generation and verification passes all unit tests

Week 1
Phase 1

Cloud API

Cloudflare Workers + D1: device registration, delivery routing, ledger events

Exit: Register device, inject delivery, see full ledger trail via API

Weeks 2–3
Phase 2

Device simulator

Node.js vault simulator + glance-only web dashboard + retrieve mock

Exit: End-to-end: send → secure → glance update → retrieve

Weeks 3–4
Phase 3

Phone app

Expo PWA: pair, retrieve, read documents, export affidavit

Exit: User reads document on phone with delivery receipt timestamps

Weeks 4–6
Phase 4

Sender API

Certified Send API, TypeScript SDK, sender portal, webhooks

Exit: Third party sends via SDK; webhooks fire on secured + retrieved

Weeks 6–8
Phase 5

Household & security

Multi-tenant vaults, capability tokens, statutory classifier, duress PIN

Exit: Two household members with isolated vaults; delegated retrieve works

Weeks 8–10

What we're building toward

Software MVP

In progress

8–10 week end-to-end demo: sender API → vault → phone retrieve → affidavit export

Design-partner sender

Outreach

One regional bank, insurer, or municipal agency on Certified Send API sandbox

Hardware prototype

Phase 2

ESP32 + secure element + glance e-ink enclosure after software proves protocol

Patent portfolio

Filed

6 US provisional families filed 2026 · PCT expansion planned

Use of funds (indicative)

  • Protocol engineering (cloud API, device simulator, mobile retrieve)
  • Security audit & legal review for statutory notice classes
  • First sender pilot integration + compliance documentation
  • Hardware industrial design & FCC path (post-software validation)

Current stage (honest)

Product

Marketing site + interactive protocol preview

IP

6 provisional patent families (US, 2026)

Build

Software MVP scoped · 8–10 weeks to E2E demo

GTM

Waitlist + sender / municipal conversations

We do not claim live production delivery, signed LOIs, or revenue on this preview. This sandbox simulates the protocol investors will fund.

Investor briefs & PDFs

Download for your IC memo — complete brief, problem/solution, patents, demo storyboard, insurance & civic use cases.

Download saves the file; Open in tab previews in the browser. If a link fails, use /documents/ folder on the site. Confidential summaries — patent pending, not legal advice.

Next step

Request the data room & founder call

Leave your details for deck access, technical deep-dive, and pilot timeline. Stored locally on this demo — production CRM hooks ready for integration.