SiteTalkie is built on the BitChat protocol — open-source BLE mesh created by Jack Dorsey. Downloaded 365,000+ times. Battle-tested during internet blackouts, government shutdowns, and national emergencies across three continents. Now purpose-built for the one place that never has signal: your construction site.
Nepal's government blocked Facebook, Instagram, WhatsApp, YouTube, and 22 other platforms during youth-led protests against corruption. Millions lost their primary communication tools overnight.
Within days, BitChat downloads surged from 3,344 to 48,781 — a 1,400% increase. The app became one of the only ways to communicate when every mainstream platform was dark. Users coordinated across Kathmandu using nothing but Bluetooth, phone to phone, with zero internet infrastructure.
At its peak, Nepal accounted for 39% of all BitChat users worldwide.
Every basement, core, and substructure is a signal dead zone. If the protocol works when a government shuts down the internet, it works when you're three floors below ground.
Protests erupted across Madagascar over water and electricity shortages. With only 6.6 million internet users out of a population of 32 million, most people had no reliable way to communicate digitally.
BitChat's Bluetooth mesh gave people a communication channel that worked without internet, without cell towers, without infrastructure of any kind. Downloads hit 21,000 in 24 hours and 71,000 within the week — the largest single surge in the protocol's history.
The protocol worked in a country where 75% of the population lives below the poverty line and mobile connections are often limited to voice and SMS only.
New-build sites have no infrastructure either. No WiFi, no cell boosters, often no power on upper floors. The protocol was literally designed for this.
Protests against parliamentary allowances escalated across Indonesia. Citizens turned to BitChat not just because of connectivity issues, but because the protocol requires no account, no phone number, no email, and no registration — making it impossible to monitor or trace.
11,000 Indonesians downloaded the app specifically because it gave them encrypted, surveillance-proof communication. Each session generates fresh encryption keys that are never stored.
Workers don't want to hand over personal phone numbers. No account, no signup, no personal data — just open and talk.
Every condition that drives people to BitChat during a crisis exists on a construction site every single day.
Government shuts down internet
No cell coverage in remote areas
Overloaded networks during mass events
Need to communicate without registration
Critical messages must reach everyone
No WiFi installed on new builds
No signal in basements, cores, shafts
Concrete and steel block signals
Subcontractors rotate daily, no time for setup
Safety alerts must reach every worker
We evaluated building our own BLE mesh protocol from scratch. Then Jack Dorsey open-sourced BitChat under a public domain licence — a protocol already proven by 365,000+ users across 50+ countries, stress-tested during three national crises in a single month.
Building on battle-tested technology means we can focus entirely on what construction sites need: safety alerts, structured channels, hardware relays, and a UI designed for gloved hands and direct sunlight.
Every device becomes a node. Messages automatically relay across multiple hops, extending range far beyond direct Bluetooth. This is exactly how 48,000 Nepalis communicated when every other platform went dark.
Ephemeral X25519 key pairs generated each session. ChaCha20-Poly1305 encryption. No persistent identity. The same encryption that made 11,000 Indonesians invisible to surveillance.
No pairing, no setup, no IT department. Walk onto site, open the app, you're on the mesh. The same simplicity that let Madagascans with no internet experience start communicating instantly.
Site-wide, floor-by-floor, and trade-specific channels. Not open chat — structured communication for how sites actually work.
Priority broadcast that bypasses normal chat. Fire, evacuation, crane movements — delivered to every device on the mesh instantly.
Dedicated always-on relay hardware that extends mesh coverage across entire multi-storey sites. The protocol handles routing — SiteNode guarantees the range.
Web-based oversight of mesh health, node status, active users, and message delivery. Decentralised protocol, centralised management.
48pt touch targets, high-contrast amber-on-dark, readable in direct sunlight. For people wearing PPE, not sitting at a desk.
Quick voice messages and photo sharing over the mesh. Report defects, confirm installations, coordinate deliveries — without typing.