Project 14 / 28
Replatform Sitecore to Astro
Escape Sitecore licensing and complexity — re-platform to a fast, headless Astro + Sanity stack.
Sitecore is powerful and expensive — in licence fees, hosting and the specialists to run it. We migrate the content and capability you actually use onto a lean, headless Astro + Sanity stack on Cloudflare: faster, far cheaper to run, and easy to edit.
Sentry's Sitecore migration moves the content and capability you actually use onto a lean headless stack — Astro and Sanity on Cloudflare — preserving the content model and editorial workflow while removing the enterprise licence, hosting and specialist costs.
Sitecore 
Astro
Cloudflare 
Sanity What actually changes
Your design is carried across exactly as it is. A redesign is a separate project, quoted separately, and only if you want one.
Website replatforming
Off Sitecore. Onto Astro and Sanity, served from Cloudflare's edge.
Sitecore AstroCloudflare Sanity An ageing content management system costs you three ways at once: maintenance and licences you keep paying, a break-in risk you carry, and slow pages that lose the visitors your ads and search already paid for. Replatforming removes all three, keeps your design, content and addresses, and leaves a site ready for what comes next.
Why replatformWhat staying on Sitecore costs you
The valueWhat replatforming returns
An estate to keep current
A large application with its own infrastructure to patch, and a narrow market of people qualified to patch it safely. The exposure is not one weak plugin. It is the size of the estate you keep current.
Attack surface removed
No application server. No database. No estate to keep current. Pages are files served from the edge, and the surface you defend shrinks to almost nothing.
Upgrade projects on their timetable
Version upgrades are projects in their own right, and the platform roadmap sets the timetable. Defer one and the next is larger.
Nothing to carry forward
One clean build, then no upgrade projects to schedule. Content, design and web addresses come across, and the roadmap becomes yours.
An enterprise cost base
Platform licensing, the infrastructure it requires, and certified specialists to work on it. A cost base sized for an enterprise content operation, whether or not you run one.
Licence and servers removed
Licence, infrastructure and certified specialists come off the bill. Editing moves to Sanity, included. Static hosting that does not climb with traffic.
Speed depends on the delivery layer
Pages are assembled on request through a personalisation and delivery layer. Speed depends on how much of it is switched on and how loaded the servers are.
Measurably faster pages
Pages are pre-built and served from the edge. At least a 20 per cent improvement in measured performance where there is room for it, proven on the same test.
Slow change, heavy recovery
Every release carries the whole platform with it, and recovery means restoring an environment rather than reverting a page.
Versioned, with one-step rollback
Every change versioned, reviewed and tested before release. Rollback to any previous version in one step. Recovery in minutes, not an environment restore.
Content locked inside the platform
Your content sits inside the platform behind its own interfaces, which is exactly what AI assistants and agents cannot work with.
AI and agentic foundations
Content becomes machine-readable in Sanity and deployment becomes something software can run. Module 01 of the roadmap below, and the prerequisite for every module after it.
Our own site runs on it. Every page sits in Google’s “good” band for speed, on mobile and desktop, measured 17 September 2026.
How we replatform
01
Discovery
We map the current site, its content, integrations and traffic, and agree what must be preserved.
02
Plan
A written migration plan: scope, page-by-page mapping, redirects, risks, and the measured baseline.
03
Approval
You approve the plan and the agreed targets. No build starts without it.
04
Replatform
Build, test and launch, then re-run the same tests and hand you the before-and-after.
Typical outcome: at least a 20 per cent improvement in measured performance where the current measurement leaves room for it, and the plugin and theme attack surface removed entirely. Proven on the same test, before and after.
Where this sits — the nine-module Growth Engine
- 01Websites
- 02Discovery
- 03Digital funnel
- 04Market sizing
- 05Data & KPIs
- 06Digital voice
- 07Automation & Integration
- 08AI
- 09SAOS
Replatforming is module 01, deliberately first: a fast, secure, agent-readable website is the asset every later module reads from and acts on. Each module stands alone, and there is no obligation to take the next.
What Replatform Sitecore to Astro delivers
Lose the licence weight
Re-platform to Astro + Sanity — keep the content model and workflow, drop the enterprise licence and hosting bill.
Faithful migration
Content, structure, redirects and SEO carried across with care — a controlled cutover, not a risky rebuild.
Fast & editable
Sub-second, edge-served on Cloudflare, with Sanity giving editors a clean, modern authoring experience.
Representative stack
ResendSitecoreSanityAstro
Next.jsCloudflare
Sentry.ioKPIs 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 4 · Quantitatively Managed — measured, predictable 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.
Migrates Sitecore content and capability onto a headless Astro + Sanity stack on Cloudflare — preserving structure and editorial workflow while removing licence and infrastructure weight.
Frees the value stream from heavy licensing and specialist dependency: the same or better digital experience at a fraction of the run-cost, faster to ship and change.
Sitecore's licence, hosting and specialist costs compound every year — for capability most teams barely use. Staying put means paying enterprise prices for the speed and agility a headless stack delivers for less.
One data layer · measured & owned
Every service creates data — captured, measured, owned.
Replatform Sitecore to Astro 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 Replatform Sitecore to Astro 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
Why migrate off Sitecore?
Because its licence, hosting and specialist costs compound every year, for capability most teams barely use. Staying put means paying enterprise prices for the speed and agility a headless stack delivers for considerably less. The question is not whether Sitecore is capable; it is whether you are using what you are paying for.
Will we lose the enterprise capability we rely on?
The capability you actually use is migrated; the capability you pay for and do not use is what gets dropped. Establishing which is which is the first job, because the expensive mistake is discovering a dependency after the licence has been cancelled rather than before.
What replaces Sitecore for our editors?
Sanity, giving editors a clean, modern authoring experience, with the content model and editorial workflow preserved rather than reinvented. A migration that forces a content team to relearn how they work fails on adoption even when it succeeds technically.
How risky is a Sitecore migration?
It is run as a controlled cutover rather than a rebuild. Content, structure, redirects and SEO are carried across with care, and the move is staged with rollback available. The alternative — a big-bang switch on an enterprise platform — is where these projects usually go wrong.
What actually gets cheaper?
The licence, the hosting and the specialist skills needed to run the platform. The site itself runs sub-second and edge-served on Cloudflare, which costs a fraction of enterprise hosting. Those savings are modelled in the Financial Value Model before the work is committed to.
How do we decide whether it is worth doing?
With a free Discovery session and a Financial Value Model. Discovery produces fourteen structured commercial outputs, including what Sitecore currently costs to keep and what the migration would return. If the numbers do not support moving, that is a legitimate outcome.
Start here · the free first step
Replatform Sitecore to Astro 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