Difference Between Sitecore 9 and Sitecore 10: In-Depth Differences

If you have worked with Sitecore before you know that Sitecore changes a lot when a new version comes out. The difference between Sitecore 9 and Sitecore 10 is huge.

When you are planning to upgrade Sitecore or when you want to hire a Sitecore developer you need to understand the differences between Sitecore 9 and Sitecore 10.

Let's look at the differences between Sitecore 9 and Sitecore 10.

A Quick Refresher: What Is Sitecore?

a powerful enterprise-grade Digital Experience Platform (DXP) and Content Management System (CMS) developed on the .NET framework

It does a lot of things. It is a content management system it helps with marketing automation it makes things personal for users. It gives you numbers to look at. All of this is in one place.

Sitecore 9 and Sitecore 10 are similar in what they want to do. They are very different, in how they actually do it. Sitecore 9 and Sitecore 10 have ways of getting the job done even though they are both Sitecore systems.

Side-by-Side Comparison

Sitecore Through the Versions: From 9 to 10.4

Every release added something. Sometimes it was a change in how things worked, sometimes it was a small but significant improvement. The releases kept making Sitecore better.

Here's a quick walkthrough of how the platform evolved, version by version.

Sitecore 9: Where the Modern Era Began

Sitecore 9, released in October 2017, was the version that set the stage for everything that followed.

It wasn't perfect, but it introduced ideas that the platform is still building on today:

• XConnect - a dedicated data collection and integration layer that finally made customer data manageable
• Sitecore Forms - replaced the old Web Forms for Marketers with something far more flexible
• Sitecore Cortex - brought AI and machine learning into content suggestions and personalization
• JavaScript Services (JSS) - opened the door to headless development with React and Angular
• Sitecore Marketing Automation - a visual, drag-and-drop automation engine for campaign workflows

Sitecore 10: The Big Reset (August 2020)

It was not just an update but a completely new way of thinking about the platform.

Sitecore 10 introduced the vision of a cloud-native, developer-friendly DXP:

• Full container support via Docker and Kubernetes - production-ready for the first time
• Sitecore CLI - command-line tooling to interact with Sitecore instances directly
• Sitecore Content Serialization (SCS) - replaced the need for third-party tools like Unicorn and TDS
• ASP.NET Core headless SDK - extending JSS beyond .NET Framework for the first time
• Horizon Editor fully launched - replacing the aging Experience Editor
• Solr replaced Azure Search - addressing long-standing search reliability issues
• Content Hub integration - marketing and DAM content brought into one centralized workflow

Sitecore 10.1: Developer Experience (March 2021)

Sitecore 10.1, was all about polishing the platform for the different people who use it daily like developers, marketers, and administrators alike.

• Redesigned Launchpad - cleaner layout with better separation of Commerce, Marketing, Content Editing, and Admin areas
• Next.js SDK - officially supported, a major win for frontend teams building modern headless sites
• Sitecore AI Auto-Personalization - introduced machine learning now automates delivery of personalized experiences without manual segment setup
• Horizon Editor - expanded, now supports searching pages and assets, editing link fields, checklists, dropdowns, and publishing sub-items
• SXA improvements - page branch templates, component-level theme assignment, and better Horizon integration
• xConnect Data Purge Tool - finally a native way to clean up old analytics data and free up space
• EXM updates - better multi-language email support and smarter retry configuration for failed sends
• Sitecore CLI - gained NuGet extensibility for better plugin management

Sitecore 10.2: Headless First (June 2021)

Sitecore made it very clear with the 10.2 version that is not just something they are trying out, but it is the future of Sitecore

• Headless SXA - introduced a way of combining SXAs component library with JSS to speed up the build process
• Sitecore CLI 3.0 - plugin support added, serialization performance improved
• Next.js and React SDK refinements - better TypeScript support and a cleaner component model
• Experience Edge - integration tightened Sitecore's GraphQL delivery layer became more central
• Improved Content Hub connector - richer DAM and editorial governance workflows
• Horizon and Reporting improvements across the board

Sitecore 10.3: Composable and Connected (March 2022)

By 10.3, Sitecore was openly positioning itself as a composable DXP pick and mix products rather than taking the whole suite.

• JSS and Headless Services 21.0 - significant headless architecture improvements
• Sitecore CLI 5.0 - major update to developer tooling
• Headless SXA matured - more stable and widely supported across multi-site setups
• Content Hub integration deepened - smoother editorial workflows between XP and Content Hub
• EXM improvements - better campaign management and multi-language email capabilities
• Performance improvements across xDB and xConnect for high-traffic environments
• SXA 10.3 - enhanced component and page management tools

Sitecore 10.4: The Stable Long-Term Foundation (April 2024)

Sitecore 10.4 came out 16 months after version 10.3. It has over 200 updates making it one of the releases ever.

• Improved Marketing Stack Integration via Sitecore Connect you can make connections to Sitecore CDP, Personalize, Salesforce and more without needing to write a lot of code.
• Accessibility improvements bring the platform closer to following the rules of the Web Content Accessibility Guidelines (WCAG)
• Enhanced visitor profiles - richer customer data for personalization and segmentation
• SQL Server 2022 support - long-awaited database compatibility update
• XM to XM Cloud Migration Tool - helps customers move content and media to Sitecore's cloud platform
• xDB to CDP Migration Tool - transfers visitor contact data to Sitecore's SaaS products
• SXA 10.4 - Tailwind CSS grid support, better site grouping controls, improved sitemap management
• Nearly 200 updates driven directly by customer feedback
• Long-term support window extended giving existing XP customers a stable runway before moving to XM Cloud

The Bigger Picture

When we look at all the versions of Sitecore we can see that they have all been heading in the same direction.

Sitecore started out as a single system that you had to run on your own servers with version 9 but it changed to a system that can run in containers and work without a head and is made up of many small parts by the time it got to version 10.4. Every new version of Sitecore that came out moved things a little further in this direction.

Conclusion

The Difference Between Sitecore 9 and Sitecore 10 is more than a new version number.

Sitecore 9 was a step forward. It introduced xConnect, Cortex and JSS. It was still getting used to being a platform, in a world where cloud comes first.

Sitecore 10 arrived with answers. We now have containerization, a native command line interface and .NET Core headless support. Sitecore 10 also has an editor, and it uses Solr instead of Azure Search. With each version of Sitecore 10 from 10.0 to 10.4 the platform just gets better. Sitecore 10 has tools, stronger headless capabilities and deeper connections with other systems, composable architecture which is what Sitecore 10 is all about.

Written by

Keyur Garala

CTO, Arroact Technologies

I'm Keyur Garala, and I have spent years working on technology that solves real problems and helps businesses move forward with confidence. 

I work with large businesses on digital solutions built on Sitecore, Adobe Experience Manager (AEM), Umbraco, Strapi, and Snowflake, systems that do not just solve today's problems but hold up as the business grows and changes. 

AI is central to how I think about building. At Arroact, we do not treat it as a feature, we treat it as a foundation.  
I focus on applying it in ways that are practical, purposeful, and genuinely valuable to the businesses we work with. 

At the end of the day, my job is to make sure the technology we work on is something teams can rely on, scale with, and build their future around.