Sentinel | Uptime Monitoring
Monitoring that beats your customers to the punch
1 follower
Monitoring that beats your customers to the punch
1 follower
Sentinel provides a centralised location in which you can see Domain, SSL and DNS information - all whilst checking that your SLAs are being met. Don't let your customers inform you that something is wrong because you didn't know.
What inspired you to build this?
Kyle and I spent years in the Agency world - building products and solving problems for other people's companies. We knew the industry inside out: the good, the bad, and the deeply frustrating. One of those frustrations kept coming up again and again. The worst way to find out a client's site was down? A customer telling them. SSL certificates expiring silently. Domain renewals slipping through the cracks. DNS changes breaking things without a sound. By the time anyone noticed, the damage was already done - lost revenue, frustrated users, and awkward client conversations we'd all been on the wrong end of.
That experience is what led us to build Sentinel.
What problem were you trying to solve?
SaaS teams and agencies don't always have dedicated DevOps engineers - but they still need their infrastructure to just work. The tools that existed felt either too complex, too scattered, or built for teams with resources most of us don't have. We wanted to bring uptime, SSL, DNS, and domain expiry monitoring into one place, with instant alerts that reach you before your customers do. Your customers shouldn't be your monitoring system.
How did your approach evolve?
We started with the basics - HTTP uptime checks - and quickly realised that monitoring a service means watching everything around it too. SSL chains, DNS misconfigurations, domain expiry risks, WHOIS changes. It grew from "is it up?" to "is everything around it healthy?"
Coming from agency backgrounds, we also knew that monitoring only works if the right people hear about it at the right time. So we leaned heavily into usability - multi-channel alerts across Slack, Teams, Discord, email and more, and role-based access for teams. We iterated on real feedback, solving real problems, and built something we're genuinely proud of.
Sentinel is proof that we know what good looks like - and we built it for ourselves this time.