Our story
We got tired of finding out
from the client
Sentinel is website monitoring built by people who were already looking after other people's sites. It exists so that the phone call about a site being down comes from us, not from the person paying you.
Our mission
Monitoring shouldn't be another thing to babysit
Sentinel was founded on a simple belief: watching a website shouldn't be complicated or expensive. If you look after dozens of client sites, you need monitoring that just works, and one more dashboard to check every morning is not that.
We had lived with the alternative: setups that took a weekend to configure, alerts that fired for nothing until everyone muted the channel, and pricing that punished you for having clients. So we built the thing we wanted. Powerful enough to trust, quiet enough to keep around.
It is made by Rootstuff, a small studio that still ships client work, which is why the product keeps its opinions about what an agency's day actually looks like.
Our journey
How we got here.
Founded
Sentinel started from a simple idea: monitoring should be easy for teams managing lots of sites, not just for teams with a dedicated ops person.
Early access
Partnered with agencies and freelancers to shape the product around real workflows: many clients, many sites, one person on call.
Launch
Launched to help small and mid-size agencies and freelance developers stay ahead of client downtime.
Growing
Still shipping from customer feedback, with a focus on speed, clarity, and getting out of your way.
What we believe
The principles that guide us
Reliability first
A monitoring tool that goes down is worse than no monitoring tool. Redundant infrastructure, and checks that run from four regions so one bad network path can't cry wolf.
Answers, not noise
An alert should tell you what broke, where, and for how long. Multi-region consensus before we page you, because waking someone up for a blip is how teams learn to ignore alerts.
Priced without games
Clear plans, no per-seat surprises, no enterprise call to see a number. The free plan is genuinely free and does not ask for a card.
Built in the open
Public docs, a real API, an MCP server, and a changelog. Your monitoring data is yours, and you can get it out however you like.
By the numbers
Built for reliability
99.9%
Platform uptime
4
Global regions and counting
30s
Fastest check interval
24/7
Monitoring
Ready to monitor client sites with confidence?
Set up your first monitor in about 60 seconds and let us do the watching.
No card for the free plan · 14-day trial on paid plans · Cancel anytime