Managed service 09 / 27
Headless Managed Website
Take the website off life-support. Flat, fast, and almost nothing left to attack.
Go headless on Astro & Cloudflare — authored once, pre-built into flat files, served from the edge with media on R2, so most of the threat surface, maintenance and cost simply disappear. Prefer a familiar CMS? We build and fully manage those too.
Sentry's Headless Managed Website service builds your site on Astro and Cloudflare — authored once, pre-built into flat files and served from the edge with media on R2 — so there is no server or database at runtime and almost nothing left to attack.
What Headless Managed Website delivers
Headless on the edge
Static HTML/CSS/JS, no server or database at runtime, global edge delivery, instant Git rollback.
Or a standard CMS
WordPress, Drupal, Joomla, Wix or Webflow — designed, built, hosted and kept fast, secure and patched.
Fully managed
Secure & patched, SEO-ready, backed up and monitored — surprises engineered out.
Sanity
AstroKPIs we move — measured, owned, reported
Every KPI is tied to a named owner and a target agreed up front — so this service is accountable to outcomes, not activity, for every stakeholder who consumes the value.
Capability Maturity — we walk you up the five levels
Operated at Level 5 · Optimising — self-improving, measured and owned. We track this rank and raise it over time. See the five levels →
Why this matters
Functional value, value-stream value — and why it can't be ignored.
Designs, builds, hosts and continuously manages a fast, secure, edge-served website — flat architecture with almost nothing left to attack.
The conversion-and-trust surface of the value stream: it is where demand becomes action, so every second of load time and every vulnerability is a direct tax on conversion and reputation.
A slow, fragile or breached site loses customers before they ever speak to you — and a single incident can cost more than years of the saving made by neglecting it. Your shop window is open 24/7; it cannot sit on life-support.
Production pedigree
The architecture we build on is trusted at global scale.
Headless on Astro & Cloudflare powers production sites for some of the world's largest organisations — sub-second, secure and edge-served. This is the proven architecture behind our builds, not a client list.
Served on
CloudflareOne data layer · measured & owned
Every service creates data — captured, measured, owned.
Headless Managed Website doesn’t just run — it generates signal. We land that data in one warehouse and turn it into live KPIs tied to a named owner, so performance is attributable and acted on, never trapped inside a single tool.
Data warehouse
Supabase
Snowflake
Keboola
BigQuery KPIs, dashboards & apps
Plotly
Retool
Apache Superset Platform-agnostic — we connect what you already use and add a warehouse only where it earns its place.
How we select technology
We choose technology last — for the outcomes it has to earn.
Never tech for its own sake. A tool joins the stack only where it measurably protects value, cuts cost or unlocks speed — fit to a designed system, owned where it counts, and measurable from day one. How we select technology →
Speed
Modern, edge-served stacks are sub-second. Slow surfaces cost conversion and SEO every single day.
Cost
Cut licence, hosting and per-task SaaS fees — pay for capability, not lock-in or idle enterprise tiers.
Security
Flat, edge architecture with almost nothing left to attack — fewer moving parts, smaller surface.
Ownership & no lock-in
Composable and self-hosted where it counts — you own the system, not rent someone else’s.
Measurability
Clean data and KPIs baked in — you cannot improve, automate or apply AI to what you cannot measure.
Fit to process
The right tool for a designed system — selected against process readiness, so it amplifies, not adds friction.
How we deliver · DMAIC
Every Headless Managed Website engagement runs on DMAIC.
Define the goal and its value, measure the baseline, analyse the real constraint, improve with a proven build, then control the gains — so results are predictable, repeatable and defensible, not down to luck.
Agree the goal, value, budget & timescale up front.
Baseline the KPIs above — current state, not guesswork.
Diagnose the real constraint and the solution needed.
Build the chosen solution; prove the uplift.
Lock in the gains; monitor and sustain them.
FAQ
Common questions
What does “headless” actually mean for a website?
It means the site has no server or database running when a visitor arrives. Sentry authors the content once, pre-builds it into flat HTML, CSS and JavaScript, and serves it from Cloudflare's edge with media on R2. Nothing is assembled per request, so most of the threat surface, maintenance and running cost simply stop existing.
Is headless always the right answer?
No, and Sentry will say so. If your team wants a familiar self-service platform, Sentry designs, builds, hosts and manages a standard CMS — WordPress, Drupal, Joomla, Wix or Webflow — with the same managed care. The architecture is chosen for how your team actually works, not to make the build tidier for us.
What happens if a deploy breaks the site?
Because the site is flat files in Git, rolling back is instant — the previous build is restored rather than a broken system repaired under pressure. That is a property of the architecture, not a support promise, which is why it holds at three in the morning as well as at three in the afternoon.
What does “fully managed” include?
Hosting, security patching, SEO readiness, backups and monitoring, plus the edits your in-house tools cannot handle. It also includes the pipeline that puts the site live. Continuous integration and continuous deployment means each change is built, checked and released automatically, rather than a person copying files onto a server at the end of the day. We build these pipelines in GitLab CI/CD, with a staging environment that is verified before anything reaches production. For development we optimise the blend of AI: we engineer the mix of artificial intelligence and human effort in delivery, so you reach the outcome faster and at lower cost than a traditional development firm. The intent is that the site needs none of your attention: surprises are engineered out rather than responded to.
Why does an old, slow website cost more than it looks?
Because the loss is invisible per visit. A slow or fragile site loses customers before they ever speak to you, and a single security incident can cost more than years of the saving made by neglecting it. Your shop window is open around the clock; it cannot sit on life-support.
What does a managed website cost?
Sentry's managed services start at £3,000 per month, scoped to the work and including selected tool costs. Edge hosting on Cloudflare is materially cheaper to run than traditional hosting, so for many sites the managed fee is partly offset by what the old stack stops costing.
Free service sheet
WordPress → Astro on Cloudflare
How a WordPress site becomes a static Astro site served from Cloudflare's edge: what changes, what it costs, what it removes, and how the migration is sequenced without losing rankings.
Start here · the free first step
Headless Managed Website starts the same way every engagement does: with Discovery.
Two distinct moves — a free, no-obligation Discovery Session to find your value at stake, then the Discovery & Blueprint: 14 structured outputs — value model, roadmap and business case — before a pound of delivery is committed.
Engaged alone or as one engine