AEM Edge Delivery Services vs AEM Sites: Which Should You Choose?

Short answer: choose Edge Delivery Services (EDS) when your priority is a very fast public website that marketing can update quickly, built with plain JavaScript and CSS. Choose traditional AEM Sites when you need deep governance, complex integrations, authenticated areas or heavily structured content managed through Java-based components. Many organisations now use both: EDS for fast public pages, and traditional AEM Sites for governed and integrated experiences.

Both are part of Adobe Experience Manager, and both sit inside an AEM Sites as a Cloud Service licence. The difference is in how pages are built, stored and delivered. This guide explains each approach in plain terms, compares them side by side, and gives you a simple way to decide.

What is traditional AEM Sites?

Traditional AEM Sites is the version of AEM most enterprises have used for years, either on AEM 6.5 or on AEM as a Cloud Service. Content is stored in a content repository (the JCR) and rendered by Apache Sling. Developers build components with HTL templates and Java, usually starting from Adobe's Core Components, and back-end logic runs as OSGi services.

Authors build pages in the Page Editor (or the newer Universal Editor) by dragging components onto editable templates. The platform comes with a large set of enterprise features: approval workflows, version history, multi-site management and translation, Experience Fragments, Content Fragments with a GraphQL API for headless delivery, and integration with the rest of Adobe Experience Cloud.

Pages are published from the author environment to publish servers, cached by the Dispatcher and served through a CDN. Code is deployed through Cloud Manager pipelines.

What is AEM Edge Delivery Services?

Edge Delivery Services is a newer way to build AEM websites, designed for speed from the ground up. Instead of Java components, the front end is a set of blocks: small folders of plain JavaScript and CSS kept in a GitHub repository. There is no heavy framework and no build step, and pages are served directly from Adobe's edge network.

Content can come from two places:

• Document authoring. Authors write pages in Google Docs or Microsoft Word on SharePoint, and use spreadsheets for structured data such as navigation, redirects or product lists. A browser extension called the Sidekick lets them preview and publish.
• Universal Editor with AEM. Authors edit visually in AEM's Universal Editor, content is stored in AEM, and pages are still delivered through Edge Delivery Services. This keeps AEM's governance features while gaining EDS performance.

Adobe built EDS to make strong Core Web Vitals scores the default, not something a team has to fight for at the end of a project. Fast pages tend to rank better, convert better and cost less to run.

Edge Delivery Services vs AEM Sites: side-by-side comparison

Speed and SEO

This is where EDS stands out most. Traditional AEM sites often load large JavaScript and CSS bundles, third-party tags and unoptimised images, and performance gets worse with each release. EDS reverses that pattern: it loads only the code each block needs, defers anything that is not visible yet, and optimises images automatically.

For SEO this matters in two ways. Google uses Core Web Vitals as a ranking signal, and faster pages keep visitors on the site longer, which helps conversions. Fast, clean HTML is also easier for search engines and AI crawlers to read, because the content is in the page rather than hidden behind client-side rendering.

Traditional AEM Sites can also be fast. It takes discipline: lean components, careful client library loading, good Dispatcher and CDN caching, and regular performance budgets. If your current AEM site is slow, the cause is usually the implementation, not the platform.

Authoring experience

With document authoring, a marketer writes a page in a familiar tool, adds a simple table to create a block such as a hero or a card grid, and publishes from the Sidekick. There is almost no training needed, which makes it popular with teams that publish a lot of campaign and editorial content.

The trade-off is control. Documents are flexible, so it is easier for authors to break layouts or skip required content. Teams that need tighter rules, such as banks, insurers and healthcare organisations, usually choose the Universal Editor option, where content is stored in AEM and governed by AEM's permissions and workflows. Our guide to AEM authoring and content management explains how those controls work.

Traditional AEM Sites gives authors a structured visual editor with templates and policies that limit what can go where. It takes more training, but it is very good at keeping large teams consistent across many sites and languages.

Development and cost of change

EDS projects need fewer specialist skills. A strong front-end developer who writes clean, accessible JavaScript and CSS can build blocks quickly, and changes go live from GitHub in minutes. There is far less infrastructure to manage, so small improvements are cheap and teams can ship them often.

Traditional AEM Sites needs AEM-specific skills: Java, Sling Models, OSGi services, HTL, Dispatcher configuration and Cloud Manager. That depth is exactly what makes it powerful for complex integrations with CRM, commerce, search, identity or core banking systems, but each change takes longer to build, test and deploy. If you are hiring for either approach, our article on AEM developer roles and skills explains which profile you need.

Governance, security and compliance

For regulated industries, governance often decides the question. Traditional AEM Sites offers multi-step approval workflows, fine-grained permissions, full version history and closed user groups for logged-in content. These are proven controls that compliance teams already understand.

EDS with Universal Editor brings much of that governance across, because the content is stored and approved in AEM. EDS with document authoring relies more on the permissions of Google Drive or SharePoint, which may or may not meet your audit requirements. We cover these needs in detail in building banking and insurance websites with AEM.

When to choose Edge Delivery Services

• You are launching a new marketing, campaign or brand site and want it live quickly.
• Page speed and organic search traffic are top business goals.
• Your content team publishes often and wants to work in familiar tools.
• The site is mostly public content, with integrations handled through APIs.
• You want lower ongoing development and infrastructure effort.

When to choose traditional AEM Sites

• You need strict approval workflows and a full audit trail.
• The site has logged-in areas, complex personalisation or gated content.
• You depend on deep back-end integrations built in Java.
• You run many brands, regions and languages with shared content and translation.
• You already have a large, working AEM component library and team.

The hybrid approach: using both

You do not have to choose one for everything. A common and effective pattern is to serve fast public pages, such as the home page, product overviews, campaigns and blog, through Edge Delivery Services, while keeping account areas, complex forms and integrated journeys on traditional AEM Sites. Both share the same AEM licence, and with Universal Editor authors can work in one editing experience across both.

The hybrid approach also works well as a migration path. Teams on AEM 6.5 (see our guide to moving from AEM 6.5 to Cloud Service) or on a slow Cloud Service site can move their highest-traffic pages to EDS first, prove the performance gains, and then decide how far to go.

Migrating an existing AEM site to Edge Delivery Services

If you already run AEM, moving to EDS is usually a front-end rebuild rather than a full replatform. A typical project looks like this:

1. Audit. List your templates and components, measure current Core Web Vitals, and find which pages bring the most traffic and revenue.
2. Choose the authoring model. Decide between document authoring and Universal Editor, based on your governance needs.
3. Map components to blocks. Most sites need fewer blocks than they had components, because many old components were variations of the same idea.
4. Build and import. Build the blocks, then migrate content. Adobe provides import tooling that can convert existing pages in bulk, with manual clean-up for complex ones.
5. Protect SEO. Keep URLs where possible, map redirects for anything that changes, and carry over titles, meta descriptions, structured data and canonical tags.
6. Launch in stages. Move one section at a time and compare traffic and performance before moving the next.

How to decide in five questions

1. Is page speed or organic traffic one of your top three website goals? If yes, lean towards EDS.
2. Do you need formal, auditable approvals for every change? If yes, use traditional AEM Sites or EDS with Universal Editor.
3. Does the site need logged-in areas or deep Java integrations? If yes, keep those parts on traditional AEM Sites.
4. Does your content team want to publish without developer help? If yes, EDS document authoring is the easiest option.
5. Do you already have a large, healthy AEM build? If yes, consider a hybrid approach rather than a rebuild.

Frequently asked questions

Is Edge Delivery Services replacing traditional AEM Sites?

No. Adobe offers both as part of AEM Sites as a Cloud Service. EDS is a delivery and development model that sits alongside traditional AEM Sites, and many customers use both together.

Do I need a separate licence for Edge Delivery Services?

Edge Delivery Services is included with AEM Sites as a Cloud Service. Exact entitlements depend on your Adobe contract, so check with your Adobe account team before planning a build.

Can Edge Delivery Services use React or another framework?

It can, but it works best without one. EDS is designed around plain JavaScript and CSS so that pages stay light. Adding a large framework usually removes much of the speed benefit.

Is Edge Delivery Services good for SEO?

Yes. It produces fast, server-delivered HTML with strong Core Web Vitals, which helps both search rankings and AI crawlers. You still need good SEO basics: clear headings, useful content, metadata, structured data and correct redirects.

Can I keep AEM workflows with Edge Delivery Services?

Yes, if you author through the Universal Editor with content stored in AEM. With document authoring, approvals rely on the tools your documents live in, such as SharePoint or Google Drive.

How long does it take to build an Edge Delivery Services site?

A focused marketing site can launch in a few weeks. Larger migrations take longer, depending on how many templates, integrations and pages you have, and how much content needs manual clean-up.

How Being Idea can help

Being Idea builds and supports both kinds of AEM website. Our team includes Edge Delivery Services developers who build fast, accessible blocks, AEM Java developers for OSGi services, Sling and integrations, and Adobe Journey Optimizer specialists for personalised customer journeys. We can audit your current site, recommend the right approach, and either deliver the project or provide dedicated AEM developers to work with your team. Tell us about your website and we will reply within one business day.