Homes
One unit per household, kept near a window or upstairs, ready to grab with the torch and the documents.
FloodMesh unit
Pre-orders open · Ships after certification
When the towers go dark, your street still talks.
FloodMesh is a small, battery-powered messenger for floods. It sends an SOS and short messages from house to house, with no mobile network, no internet and no power grid.
No payment now. We call to confirm before anything ships.
MSG FROM B-14
WATER AT OUR GATE.
ALL SAFE UPSTAIRS.
How it works
Every unit talks to the units around it
There are no towers and no SIM cards. Each FloodMesh unit talks straight to the units nearby and passes messages on, so a message can travel through a whole neighbourhood.
- Unit asleep, saving battery
- Unit awake
- Showing the message
- SOS passed on quietly
Short messages: talk to your street
Type a short message
Up to 60 characters on the keypad, in English or Tanglish.
Everyone nearby sees it
Every unit in reach shows the message, so neighbours can help each other straight away.
Units pass it on
Each unit passes the message to the next, so it reaches the next streets too. A unit plugged in on a rooftop carries it further.
SOS: call a rescue team
Hold for SOS, then pick the help you need
Hold two keys for three seconds. Then press one number: medical, evacuation, hazard, food, or general. If you can't choose, it sends a general SOS by itself.
Units nearby pass it on
Every FloodMesh unit in your area passes your SOS one step further, house to house, until it reaches a responder unit, the kind we set up for rescue teams. Your neighbours' units pass it on without showing it.
Rescuers answer
The rescue team sees the help you need and, if your unit is registered, your home's address. Your screen shows DELIVERED, then HELP IS COMING when someone is on the way. If no responder unit can be reached, it shows SOS NOT DELIVERED.
How units talk to each other
- Hop by hop
- Every unit passes messages on, so they get around buildings and through several homes. Our street tests reached 350 m between two units, and 550 m with one more unit in between.
- Asleep until needed
- A unit on battery sleeps to save power and wakes the moment a message arrives.
- Shown to the right people
- Messages show on every unit nearby. An SOS shows only on rescue teams' responder units.
- You know it got through
- Your screen shows DELIVERED when your SOS reaches a responder unit, and HELP IS COMING when someone is on the way.
Why we are building it
The phone network and the power failed together.
2015
Chennai floods. Mobile towers and power failed together. Neighbours 200 m apart could not tell each other they were safe.
2023
Cyclone Michaung. It happened again: no network, no power, and no way to call for help from a flooded street.
Phones need a tower. Towers need power and a link back to the network, and in a flood all three fail at once.
FloodMesh needs none of them. Each unit passes messages to the next, so a call for help can travel down a street and around buildings to a rescue team that has a FloodMesh responder unit.
What it does
Built for the worst week of the year
Short messages to neighbours
Type up to 60 characters on the keypad, in English or Tanglish. Everyone nearby can read them and help.
SOS with the help you need
Medical, evacuation, hazard, food or general, so rescue teams can send the right people first.
No SIM, no internet, no towers
Units talk directly to each other. Nothing to subscribe to and nothing that fails when the network does.
Plug in to extend your area's network
A unit on external power, from solar or a UPS, acts as a relay: it stays on and passes messages for every unit around it.
Rescuers see your home's address
Register your unit to your home's address when you get it, and a rescue team sees which house needs help. An unregistered unit still sends its SOS.
Ready out of the box
Charge it from any USB-C phone charger or power bank, and keep it near a window, upstairs if you can. Designed to last for days on one charge.
Field tests
Tested on real streets, results in public
We test outdoors and share every result, good or bad. These are early numbers from September 2026, between units at street level. Our first rooftop unit was left on battery by mistake, so we are testing it again on proper power; we expect it to reach further.
350 mBetween two units held at street level, with buildings around.
550 mThe same street, with a third unit passing the message along.
4Units in our first full test. The SOS reached the responder unit; short messages showed a weakness we are now working on.
Who it's for
One street works better than one house
FloodMesh gets stronger with every unit nearby. The best start is a whole lane, apartment block or colony.
Apartments and residents' associations
Street, neighbourhood, ward, area and village packs at 10% to 30% off, and rooftop antennas so a few units reach further.
See the packsRescue teams and NGOs
We set up units as responder units for your team: they receive every SOS, show the type of help and the registered address, and send "Help is coming".
Ask about responder unitsCSR and government partners
Equip a flood-prone ward or village. We'll plan it with you.
Talk to usQuestions
Before you pre-order
Do I need a phone, SIM or internet?
No. FloodMesh units talk to each other directly. You don't need a phone to send an SOS or a message.
Can I message my neighbours?
Yes. Type up to 60 characters on the keypad, in English or Tanglish. Every unit nearby shows it, and units pass it on to the next streets. Use messages to check on neighbours, share news or ask for help from people close by; use the SOS to call a rescue team.
What happens when the power is out?
The unit runs on its own rechargeable battery and sleeps until a message arrives or you press a key. Charge it from any USB-C phone charger or power bank.
Who can read my messages?
Short messages are public: anyone nearby with a unit can read them, so neighbours can help. An SOS appears only on responder units, but it is not secret: someone nearby with the right equipment could pick up any SOS or message, including the kind of help asked for. Don't send anything you want to keep private.
Who receives my SOS?
Rescue teams, NGOs and authorities with a FloodMesh responder unit within reach of the units in your area. Your neighbours' units pass your SOS on but don't show it. If no responder unit can be reached, your screen shows SOS NOT DELIVERED; send a short message too, because every unit nearby shows messages. We set up responder units only for organisations we have checked, so ask your residents' association or local rescue team to contact us.
How far does it reach?
It depends on buildings, height and how many units are nearby. Each unit passes messages on, so the more homes in your area have one, the further a message travels. See our field tests for measured numbers.
When will it ship?
After the approvals and registrations required in India to sell radio equipment with a built-in battery are complete. We will tell everyone who pre-ordered as soon as we have a date.
Do I pay now? Can I cancel?
You pay nothing now. We call you to confirm before anything ships, and you can cancel your pre-order at any time before it ships, at no cost.
How much does it cost?
One unit is ₹6,900. The more units you buy together, the bigger the discount: 10% off for 10 to 24 units, 15% for 25 to 49, 20% for 50 to 99, 25% for 100 to 249, and 30% for 250 or more. Packs of 10, 25, 50, 100 and 250 units come at these rates, or choose any number from 10 in a custom pack. A rooftop antenna is ₹6,500 and a longer antenna cable is ₹750. Each unit comes with its antenna and a quick-start guide.
Which languages does the unit use?
The screen is in English. You can type messages in English or in Tanglish (Tamil in English letters).
Get your street ready for the upcoming flood
Pre-order for your home, or talk to us about your colony, NGO or ward.