About Sébastien Puyet, founder of Fivenines

Founder-led infrastructure monitoring from Montpellier.

I'm Sébastien Puyet, founder of Fivenines. Since 2024, I've been building monitoring with clear pricing, an open-source agent, and direct support.

Founded 2024 · Bootstrapped · Built in Montpellier

The story

Why I built Fivenines

I have run infrastructure long enough to know that monitoring usually fails in two ways: it is either too small to trust, or so large that it becomes another system you have to operate. A single VPS starts with a few scripts. Then you add uptime checks, cron alerts, logs, dashboards, status pages, and vulnerability scans. At some point the monitoring stack needs monitoring too.

The big tools solve this for big companies, but they bring big-company assumptions with them: usage-based pricing, sales cycles, agents you cannot inspect, and enough configuration surface to lose a week before the first useful alert. The open-source route can be great, but Prometheus, Grafana, exporters, alert routing, and long-term storage still need someone to keep them healthy.

Fivenines exists for the teams in between. People running real server infrastructure who want server metrics, uptime checks, network visibility, cron monitoring, incidents, status pages, and vulnerability scanning without assembling a platform from five tools.

Fivenines is built independently from Montpellier, without VC pressure or opaque enterprise pricing. The agent is open-source. Pricing is meant to be boring. Support is direct. When something is unclear, you can email and get an answer from the person building the product.

The goal is simple: give engineers a monitoring platform they can understand, trust, and leave running while they get back to shipping.

What we believe

Stances, not values

The useful promises are the ones that change how the product is built.

Open by default

The agent is open-source.

You can audit what runs on your servers instead of trusting a binary blob.

View the agent on GitHub

Prices you can predict

Flat-rate plans, no surprise bills.

No per-host tricks, no per-metric metering, and no usage anxiety when your fleet grows.

See pricing

EU first, EU data

Hosted in Germany, operated from France.

Fivenines is built for teams who care where their monitoring data lives.

Read the privacy policy

Founder access, not tickets

Email the person building it.

Technical question, weird bug, pricing concern - I read everything and reply directly.

sebastien@fivenines.io

Things we'll never become

The point is not to become another monitoring suite with a bigger contract and a slower product.

  • We don't do per-host pricing tricks

    Flat plans, predictable bills, and no surprise metric ingestion fees.

  • We don't do enterprise sales theatre

    No quarterly business reviews. No demo-then-quote dance. Trial it, sign up, or email me.

  • We don't lock you in

    Open-source agent, REST API, full data export, and cancellation whenever you need it.

Company information

Company name
fivenines.io
Registration
809 093 297
Location
97 rue Verrochio, 34000 Montpellier, France
Phone
+33 6 01 59 25 38

Got questions? Want to talk?

I read every email. Reach out with a technical question, pricing question, or just to understand whether Fivenines fits your infrastructure.

Or say hi on X or GitHub