The Problem Product How It Works For Homeowners For Cities
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The Smart Mailbox That Delivers Emergency Alerts to Your Curb.

When sirens fail and phones go dark, SignalPost keeps your household informed with clear voice alerts and a visible beacon — solar-powered, right at your curb.

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Solar
Powered
Voice
+ LED Alert
IPAWS
Verified
$0
Grid Cost
🏠 I'm a homeowner or HOA 🏛️ I'm an emergency manager or city official
The Problem
Why current systems fall short.

Outdoor emergency alert sirens are aging, fail to activate, are easy to miss indoors, and don't trigger action. For small towns with shrinking budgets and growing climate risk, the math doesn't work — and the gap keeps widening.

🏠

Sirens weren't designed to reach you indoors.

Outdoor sirens lose up to half their reach during storms — and modern insulated homes block what's left.

🔌

Most systems fail when the grid goes down.

When power goes out, every smart device, phone charger, and Wi-Fi router goes silent — taking your alerts with them.

💸

Too expensive to replace — or add more.

A single siren replacement runs $30K–$100K, and 70% of outdoor sirens in the U.S. are past their useful life.

How people receive alerts today Estimated Action Rate
Smartphone WEA notification~12%
Municipal siren (tone only, no voice)~25%
SignalPost at your curb (voice + light + hyperlocal)70%
The Solution
Transforming the Curb into a Lifeline.
We've turned the most stagnant neighborhood infrastructure — the mailbox — into a smart, solar-powered emergency node.
⚡

Runs on Solar

100% solar-powered with battery backup. No wiring, no electrician, no outlet — it works when the power doesn't.

📡

Verified Emergency Alerts

Receives official IPAWS alerts (the same system used by FEMA) over cellular — filtered to your exact location, not the whole county.

🔊

Speaks, Not Just Screams

Clear voice instructions tell you what's happening and exactly what to do — not just a vague siren tone.

🚨

Visible From the Street

A 360° LED beacon visible from 500+ feet — your neighbors see it, first responders see it, everyone acts.

SignalPost SmartMailbox
How It Works
Three layers of protection. Zero grid dependency.
🌤️

Charges Itself

An integrated solar panel and battery provide extended autonomous operation — no wiring, no electrician, no outlet.

📨

Receives Geofenced Alerts

A built-in cellular modem receives verified IPAWS emergency alerts — tornado warnings, flood alerts, evacuation orders — in seconds.

🚨

Creates Unmissable Awareness

The LED halo activates — visible from 500+ feet — while a speaker broadcasts clear voice instructions.

For Homeowners & HOAs
Your mailbox, upgraded.
SignalPost replaces your old curbside mailbox with a modern, solar-powered smart mailbox. It still holds your mail — and does a lot more.
📬

Knows when mail arrives

Get notified the moment mail is delivered. No more guessing or unnecessary trips to the curb.

🔒

Locks for security

A locking mailbox keeps your mail safe from theft. Access it from the yard side — no leaning into the road.

🚨

Delivers emergency alerts

When a tornado, flood, or wildfire warning is issued for your area, SignalPost sounds a clear voice alert and lights up — even if your power is out and your phone is dead.

💡

Visible day and night

A built-in LED beacon doubles as ambient curb lighting after dark — and activates as a bright visual alert during emergencies.

☀️

Runs on solar

No wiring, no electrician, no outlet. Installs on your existing mailbox post. Charges itself. Works when the grid doesn't.

✨

Curb appeal that turns heads

A sleek, modern design that looks like a deliberate upgrade. Neighbors will ask where you got it.

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For Municipalities & Emergency Managers
Alerts that reach the curb, not just the county.
SignalPost gives emergency operations centers a new way to reach residents — block by block, house by house — without building new infrastructure.
🖥️

Portal for hyperlocal alerts

Send targeted alerts to specific blocks, streets, or neighborhoods through the SignalPost management portal. No more county-wide blasts that everyone ignores.

📡

Mass reach, zero infrastructure cost

Residents buy and install their own units. Your city gains a distributed alert network without capital expenditure — no new towers, no trenching, no maintenance budget.

🏘️

Neighborhood mesh coverage

As more homes on a block install SignalPost, the visible and audible coverage overlaps — creating a mesh of awareness across the neighborhood.

🚑

Guides first responders to the right house

When a 911 call is placed, the unit at that address can activate its beacon — so police, fire, and EMS can visually identify the exact home. Less guesswork, faster response.

💧

Non-emergency advisories too

Boil water notices. Water conservation alerts. Road closures. Street-level advisories that don't warrant a siren but still need to reach residents — delivered right to the curb.

🌪️

Works when everything else fails

Solar-powered and cellular-connected. When the grid goes down and phones go dark, SignalPost units stay on — reaching people that sirens and smartphones can't.

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How Alerts Compare
Not all alerts are created equal.
Alert Method Estimated Action Rate
Smartphone WEA notification~12%
Municipal siren (tone only, no voice)~25%
SignalPost at your curb (voice + light + hyperlocal)70%

A siren tells your county there's danger. A phone notification gets swiped away. SignalPost tells your household what's happening, what to do, and confirms it with a visual signal you can't miss — right at the curb.

The Evidence
Real failures that define the problem we're solving.
These are documented alert failures from the past 24 months — the gap SignalPost is being built to close.
Tornado · Siren Failure

Tornado Sirens Failed to Activate — Despite Being Tested the Day Before

During a May 2025 EF-3 tornado outbreak, a city's entire siren system failed to sound. Residents received no text alerts. The sirens had been tested successfully just 24 hours earlier — yet when the real threat arrived, the system went silent. This is the exact failure mode SignalPost is designed to address — a curbside alert node that receives verified alerts directly and responds automatically, without human activation.

Grist · Center for Disaster Philanthropy May 2025
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Hurricane · Grid Failure

Hurricane Helene: Millions Without Power, Every Grid-Dependent Alert Went Dark

In 2024, U.S. electricity customers experienced an average of 11 hours of interruptions — nearly double the prior decade. Three hurricanes accounted for 80% of all outage hours. When the grid fails, every smart device, phone charger, and Wi-Fi router goes silent. Grid-independent alert infrastructure at the curb would remain operational through these outages — the core design principle behind SignalPost.

U.S. Energy Information Administration 2024
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Infrastructure · Communication Failure

Hurricane Beryl: Millions Lost Power, Utility Communication Collapsed

When Hurricane Beryl struck Texas in July 2024, nearly 3 million people lost power. The utility provider faced widespread criticism for delayed communication — some areas went over a week without electricity and without clear information. When both sirens and phones fail simultaneously, the gap in last-mile alert delivery becomes a life-safety issue. SignalPost is being engineered to operate independently of grid power and cellular network congestion.

Campus Safety Magazine Jul 2024
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By the Numbers
The scale of the crisis — and a simple solution already at the curb.
~50M
U.S. curbside mailboxes — each one a potential SignalPost node
USPS delivery point data
44M
Americans in "alert deserts" with no reliable outdoor warning
FCC/FEMA coverage analysis
70%
Of outdoor sirens past their useful life
DHS infrastructure assessments
80%
Of major power outages caused by severe weather
U.S. Energy Information Administration, 2024
Get Started
Bring SignalPost to your community.
Whether you're a homeowner, HOA board member, or emergency manager — we'll help you bring SignalPost to your neighborhood.

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