Dotzauer & Carr — For a Safer, More Beautiful Brazil
It started as a dinner conversation in China's safest city. It became a German-Brazilian venture to bring autonomous perimeter intelligence to the properties that need it most.
How It Started
"We were at dinner in Shenzhen — a city of 18 million people where you can walk anywhere at 3am and feel completely safe. Marcus looked at me and said: why can't Brazil have this? That night, Sentinela was born."Dr. Dominik Dotzauer, Co-Founder
The Problem
Armed guards cost R$20,000-60,000 per month, cover a fraction of your perimeter, and can't see in the dark. Meanwhile, agricultural machinery theft is up 37.5% and MST land invasions in 2025 have already surpassed all of 2024.
Marcus Carr's Vision
Marcus isn't building security products. He's building the infrastructure for a safer Brazil — starting with the properties that feed the nation and the families that own them.
Every Sentinela system is designed to be beautiful enough that you're proud it's on your property, and intelligent enough that threats never reach your front door.
Perimeter Systems
Deploy one. Deploy all three. Each system connects to a single command center accessible from your phone, anywhere in the world via Starlink.
AI Perimeter Vision
Beautiful cameras that see what guards can't. Thermal imaging, facial recognition, and anomaly detection across your entire perimeter — day and night. Connects via Starlink for properties beyond cellular reach.
Autonomous Aerial Patrol
Drone-in-a-box systems that launch, patrol, and return autonomously. ANAC BVLOS-approved since January 2026. One dock covers 800 hectares. For a 5,000-hectare fazenda: 4-6 docks, complete coverage, zero human pilots.
Ground Patrol Intelligence
Autonomous ground units that patrol terrain no wheeled system can reach. Stairs, slopes, gardens, fence lines. Your guests will admire the engineering. Uninvited visitors will reconsider their plans.
Engineered in Shenzhen
Shenzhen — 18 million people, virtually zero violent crime. Our R&D sits in Nanshan District, ten minutes from DJI, fifteen from Huawei, next door to UBTECH. We chose Shenzhen because it proves that technology can make a city feel safe. Now we're bringing that to Brazil's countryside.
The Founders
Brazil 🇧🇷
Co-Founder & CEO
Marcus grew up navigating the reality of Brazilian security — the armored cars, the guards, the constant awareness. When he moved to Shenzhen and experienced a megacity where safety is invisible and ubiquitous, he knew the technology existed to transform Brazil. Sentinela is his answer: bring the world's best security hardware home, wrapped in design that honors the beauty of the properties it protects.
"Every fazendeiro I talk to spends more on guards than on their children's education. That's not a security solution. That's a failure of imagination."
Germany 🇩🇪
Co-Founder & CTO
Physician turned technologist, based between Berlin and Shenzhen. Dominik brings German engineering discipline to a market that has never experienced it. His background in medical AI means every system is built with the reliability of something lives depend on — because in Brazil's countryside, they do.
"Security equipment doesn't have to be ugly. The best German engineering has always been functional and beautiful. We apply the same standard."
The Opportunity
Forbes Brasil 2025: R$382.8 billion combined wealth. Properties spanning hundreds of thousands of hectares.
Ajax entered April 2025. Verkada has no LATAM presence. The upper-right quadrant — high design, high tech — is empty.
An autonomous system replacing two guards saves R$40,000/month. The hardware pays for itself before the first harvest.
Resources
Enter your property size and current guard costs. See exactly when autonomous security pays for itself.
Calculate Now →Whitepaper: the hidden cost of rural security in Brazil. Real data from CNA, IBGE, and field research.
Read Report →30-point checklist for fazenda security. Score your property and identify vulnerabilities in 10 minutes.
Start Audit →Private Consultation
Sentinela systems are deployed with select properties across Brazil. We begin each engagement with a private security assessment — understanding your land, your risks, and your vision. No obligation. No pressure. Just clarity.
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