01
External observer
We don’t ask for an installed agent, database credentials, injected code. We look at your domain the way an attacker (or a customer) would — and report what shows up.
About
We observe sites from outside — because someone has to.
Sentinela is a Brazilian uptime-monitoring and external-security-audit platform. We believe anyone running a site on the internet deserves to know what goes down, what leaks and what’s visible from outside — with pricing in BRL, without having to become an observability architect to understand the dashboard.
Why we exist
The problem is the silence.
Site down? The owner finds out from the customer. SSL certificate expired? From the visitor’s browser shouting "not secure". Broken DNS after a change? From an email that doesn’t arrive. Exposed site leaking .env? From an anonymous security researcher on a foreign forum, three months later.
The tooling to prevent this exists — but it lives in tools billed in USD, with an English dashboard, built for SRE teams who know what p95 is. For an SMB, agency or solo dev, it’s too expensive and too technical.
Sentinela combines uptime and security audit in one dashboard, with clear language, prices in BRL and hosting in Brazil. You know when your site goes down. You know if an HTTP header is missing. You know if the LGPD probe found something that shouldn’t be exposed. And you can show all of it to your client, with a dated PDF and an A-F grade.
The name is literal: sentinel, the silent figure that keeps watch. We don’t interrupt your flow, don’t get in the way of development — we observe, record and warn only when it matters.
Principles
How we think about the product.
02
Technical honesty
Sentinela is not a pentest. It’s automated external ASM. We say so up front instead of promising what we don’t deliver — you deserve to know what you’re buying.
03
LGPD by design
We host in Brazil, speak LGPD natively, have a dedicated compliance probe. Privacy isn’t a compliance check — it’s architecture.
04
Genuinely localized
UI, emails, Telegram, PDF and every finding description are written by people who speak the language. No CVE pasted from a foreign scanner here.
05
A score that moves the needle
A list of 80 findings with no context helps nobody. Each finding has weighted severity, evidence and a clear recommendation — ordered by what changes your grade the most.
06
No lock-in
Export everything: PDF, CSV via API, open webhook. Cancel whenever you want — the data stays yours. We’d rather retain you through quality, not friction.
The company
M2HP Tecnologia — Itajaí, SC.
Sentinela is operated by M2HP TECNOLOGIA LTDA, a Brazilian company headquartered in Itajaí, Santa Catarina. We build software to observe the internet from outside — with the calm of people who have operated systems long enough to have scars.
We believe the next decade of Brazilian software needs fewer adapted foreign tools and more Brazilian tools built with care. Sentinela is our bet in that direction.
The name
Why "Sentinela".
A sentinel is the silent figure that watches the perimeter while the rest of the camp sleeps. It doesn’t attack. It doesn’t interfere. It observes and warns. That’s exactly the role the product plays: continuous watch over what your domain shows the world, with alerts only when something changes.
quiet uptime, observed.
Start free or come talk to us.
Five monitors and one audit per month, forever. No card. For Pro+, talk to us.