Your team stays connected. Even underground.
Bluetooth mesh messaging for construction sites. Works in basements, through concrete, everywhere signal doesn't. Free for every worker.
Open the app
No account, no signup, no phone number. Just set a display name and you're on the mesh.
Messages hop automatically
Your message relays through nearby phones using Bluetooth. Each hop extends range through concrete, between floors, across the site.
Everyone stays connected
The mesh builds itself. More phones = more coverage. Works in basements, risers, and everywhere signal doesn't.
Every phone becomes a relay. Zero setup.
Every phone on the mesh automatically relays messages to extend range. No server, no WiFi, no IT department. Walk on site, open the app, and your messages hop through nearby phones using Bluetooth — through concrete, between floors, across the entire site.
End-to-end encrypted. No accounts.
AES-256-GCM encryption. Messages are encrypted on device, unreadable in transit. No account, no phone number, no email required. Privacy by design — we don't collect personal data because we never ask for it.
One-tap SOS. Through walls. Between floors.
One-tap emergency alert that reaches every device on the mesh instantly. Messages relay through walls and between floors. SiteNode dedicated hardware extends coverage further across multi-storey sites.
What happens on site
Every feature below is built and working. No roadmap promises.
Cardiac arrest on Level 6. Every phone becomes a first responder.
Worker collapses. Bystander hits SOS, selects Cardiac Arrest. Instantly: CPR instructions on every phone. Photo of the nearest defibrillator with walking directions. Workers closest to the casualty flagged automatically. 3 minutes to defibrillator — not 8. All over BLE mesh. No signal required.
50 workers. Radios for 6 cost £2,100. SiteTalkie for all 50 costs £0.
Two-way radios cost £350 each and only 6 people get one. SiteTalkie is free for every worker on site — text, photos, voice notes, channels, SOS, hazard pins. The cleaner has comms. The delivery driver has comms. The apprentice on Level 8 has comms.
Spot a hazard. Drop a pin. Anyone approaching gets warned.
Photograph a hazard, drop a pin with location. A geofence triggers an automatic alert for anyone walking into the area. The pin stays active until the hazard is resolved. A live, digital warning sign that follows workers — not a laminated sheet that nobody reads.
110 dB concrete cutting. The fire alert their ears never heard.
On a loud site, nobody hears a shout or a siren. SiteTalkie delivers alerts as text, vibration, and full-screen overlay simultaneously. A fire evacuation hits every phone on site — even in the noisiest zones, even underground, even when two-way radios can't penetrate.
iPhone to Android in a basement. No signal needed.
Method statements, permit photos, drawings — sent phone-to-phone over BLE mesh. No WhatsApp, no email, no mobile signal. Works between iPhone and Android. The document reaches the worker in the dead zone, not just the ones with reception.
Free. For every worker. Forever.
Text messaging, voice notes, photos, SOS alerts, hazard pins, channels, end-to-end encryption — all free. No trial. No paywall. No "upgrade to unlock." Every feature works for every user on every site.
Need guaranteed coverage?
SiteNode is dedicated BLE relay hardware that extends the mesh across multi-storey sites. Mount it, plug it in, walk away.
Get your team connected
Enter your email. We'll tell you when SiteTalkie launches.