French startup Securpost unveils a connected letterbox sensor capable of recognising mail and parcels, offering real-time alerts via AI-powered detection and long-range wireless connectivity, with plans for commercial launch in September.
Securpost is preparing to bring a connected letterbox sensor to market, promising to alert users the moment mail or parcels are delivered. The French company’s device is designed to fit inside an existing post box and went on to win gold at the Concours Lépine International Paris 2026, alongside the Prix de l’Univers connecté. Commercial launch is scheduled for September 1, with sales aimed at both households and professional users. According to Journal du Geek, the concept was developed during lockdown, when waiting for deliveries became a daily routine for many people.
Rather than acting as a basic door-open detector, the product is meant to recognise deposits and removals, take an infrared image of the contents and use artificial intelligence to identify what has been placed inside. Securpost says the unit can be installed in under a minute, connects wirelessly over long range and runs for up to two years on batteries. The company’s own website says the system also supports reception history, alert sharing and multi-sensor management, and that it uses 4G LTE-M connectivity without a subscription.
The engineering challenge is not trivial. Metal mailboxes can interfere with radio signals, while temperature swings and humidity can shorten battery life and complicate sensor performance. To address those constraints, Securpost worked with Alciom, a French firm focused on embedded electronics, antennas and low-power systems. Journal du Geek said Alciom helped select sensors and communication technology, assess power consumption and tune the antenna so the device could still send alerts from a metal mailbox several dozen metres from a home.
Some details remain unclear. Journal du Geek said Securpost had not disclosed the price, any possible subscription charge, or how long the infrared images are stored. It also said the company had not explained how accurately the AI can distinguish between an envelope and a supermarket leaflet. By contrast, Securpost’s website now lists the device at €69.90, which suggests the commercial offer is becoming more concrete even as some technical and privacy questions remain unanswered.
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