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Is Adobe Experience Manager a good headless CMS, or should you use a dedicated one?
Short answer
Adobe Experience Manager (AEM) is a sound headless content management system (CMS) only for teams that already license it. For a new build, Deploi picks Sanity, a dedicated headless CMS, because AEM as a Cloud Service counts one licensed content request per five headless API (application programming interface) calls, cache hits included (Adobe License dashboard; Adobe content requests, October 2026).
- How AEM delivers headless content
- Content Fragments over GraphQL or RESTModels built in AEM's Content Fragment Model editor; fragments stored as AEM Assets; delivered by a customized GraphQL API or the Content Fragment Delivery with OpenAPI REST APISources: Adobe Experience League (Introduction to Adobe Experience Manager as a Headless CMS, AEM GraphQL API for use with Content Fragments, AEM APIs for Structured Content Delivery and Management)
- API licensing on AEM as a Cloud Service
- Content requests, one per five API callsAdobe counts one content request per page view or per five API calls where the first cache receives them, whether or not the cache answers; HTTP 400 to 499 responses are excludedSources: Adobe Experience League (Understand Cloud Service Content Requests, License Dashboard)
- AEM price
- Not published; Adobe quotesThe AEM Sites product page offers "Book a demo" but shows no price, as of October 2026Source: Adobe (Adobe Experience Manager Sites)
- Sanity Growth plan
- $15 per seat a month, 1M API CDN requestsBilled monthly per seat; includes 1 million API CDN requests and 250,000 API requests a month, with overage billed above them, as of October 2026Sources: Sanity (Plans that scale with you, Sanity for Startups, Introducing the new Sanity Growth plan to serve collaborative teams); Sanity Docs (Plans and payments)
Deploi’s call
Use AEM headless when AEM is already your system of record for pages and assets. For anything new, use Sanity: buying AEM as a Cloud Service for its fragment store means paying for a page-and-asset suite, modeling content in an editor instead of code, and licensing your delivery traffic as content requests.
PickPick Sanity as the headless content management system (CMS) when
- You're starting a headless build and don't already license Adobe Experience Manager (AEM), so buying it would mean paying for a page-and-asset suite to use its fragment store.
- Developers want the content model in code under version control, because AEM builds Content Fragment Models in its own editor.
- Delivery traffic is high or hard to predict, so you'd rather budget against Sanity Growth's published quotas than the content-request limits in an AEM as a Cloud Service license, as of October 2026.
- The content feeds apps and channels beyond one website, so a store with no page layer fits better.
AlternativeUse AEM headless, or AEM with Edge Delivery Services, instead when
- You already run AEM as a Cloud Service and the content sits next to AEM Assets and Sites pages, so fragments reuse what you've paid for.
- Adobe Target and Adobe Analytics already personalize and measure that content, so a second CMS would add an integration to rebuild.
- Authors work in AEM daily, because a second CMS would split the editorial team.
- Authors must write in Word documents kept in SharePoint or Google Drive and the output is a website: pick AEM with Edge Delivery Services, because it publishes those documents.
How does AEM work as a headless CMS?
Adobe Experience Manager (AEM) works as a headless content management system (CMS) by delivering Content Fragments, structured content built on Content Fragment Models, to any app over HTTP (Adobe Experience League, October 2026). AEM as a Cloud Service builds this from three pieces:
- Content Fragment Models. Information architects define them in AEM's Content Fragment Model editor.
- Content Fragments. Authors create them in the Content Fragment editor, and AEM stores them as AEM Assets.
- Delivery APIs. A GraphQL API that Adobe calls "a customized implementation, based on standard GraphQL" (AEM GraphQL docs, October 2026), and a representational state transfer (REST) application programming interface (API), Content Fragment Delivery with OpenAPI, built for delivery through a content delivery network (CDN) (AEM APIs, October 2026).
AEM generates the GraphQL schema from your enabled models, so a model change is a schema change (AEM GraphQL docs, October 2026). AEM 6.5 also ships Content Fragments with GraphQL (AEM 6.5 GraphQL docs, October 2026), but core support for classic 6.5 on premises ends 28 February 2027 (Adobe KB, October 2026). AEM as a Cloud Service is the headless version to evaluate for a new build; 6.5 LTS (long-term support) is an upgrade decision for existing 6.5 estates.
Which options belong on an AEM headless shortlist?
Three options belong on the shortlist: Adobe Experience Manager (AEM) headless on AEM as a Cloud Service, AEM with Edge Delivery Services, and Sanity, a dedicated headless content management system (CMS). Edge Delivery Services replaces AEM Publish and Dispatcher with a software-as-a-service (SaaS) delivery layer for websites (Adobe Experience League, October 2026), so it suits a site more than an app.
| Criterion | AEM headless | AEM with Edge Delivery Services | Sanity |
|---|---|---|---|
| Content model | Built in AEM's Content Fragment Model editor | AEM authoring or documents | JavaScript or TypeScript schema files |
| Authoring | Content Fragment editor, Universal Editor | Universal Editor, or Word documents from SharePoint or Google Drive | Sanity Studio with Visual Editing |
| Delivery | GraphQL persisted queries or OpenAPI JSON delivery | Pages rendered at the edge | GROQ, or a GraphQL endpoint you deploy |
| Billing basis | Content requests on Cloud Service, cache hits included | Content requests, counted as for AEM Sites | Seats plus monthly usage quotas |
| Fit | Estates already on AEM Sites and Assets | Web-only sites with document authors | New headless builds, our pick |
Where is AEM headless strong?
Adobe Experience Manager (AEM) headless is strongest when AEM is already where your pages and assets live, because fragments join that estate instead of starting a new one. Adobe's own docs give three reasons:
- One repository. Content Fragments are stored as AEM Assets and can be managed in the Assets console or the Content Fragments console (Adobe Experience League, October 2026).
- Pages and fragments together. Adobe says headful versus headless "does not need to be a binary choice in AEM", so one AEM can run pages and feed apps (Adobe Experience League, October 2026).
- In-context editing. Adobe says the Universal Editor increases author efficiency "whether headless or headful" (Edge Delivery Services overview, October 2026).
Persisted queries can be cached by the Dispatcher and the content delivery network (CDN), and Adobe recommends them on publish instances (AEM GraphQL docs, October 2026). For a team that already licenses AEM Sites and Assets, that means headless delivery without a second vendor, a second login or a second asset store (Deploi's judgment).
Where does AEM headless strain?
Adobe Experience Manager (AEM) headless strains on developer workflow, query rules and licensing, and each strain comes from Adobe's own docs:
- Models start in AEM's editor. Content Fragment Models are built in AEM's editor or through its management OpenAPIs (AEM APIs, October 2026); Adobe's GraphQL page also describes installing models from a content package (AEM GraphQL docs, October 2026). That is a different workflow from Sanity's schema files, which live in your repository (Deploi's reading).
- Ad hoc queries are blocked. GraphQL queries sent in a request body aren't cached, so the Dispatcher blocks them by default, and Adobe says direct queries "may be deprecated" (AEM GraphQL docs, October 2026).
- Query and schema limits. A query can't exceed 15,000 tokens, and if a referenced model is unpublished, "AEM generates an incomplete Schema for the parent Content Fragment Model" (AEM GraphQL docs, October 2026).
- API traffic is licensed. Headless application programming interface (API) calls "still count as content requests" against the AEM Sites as a Cloud Service license, one request per five calls (Adobe Experience League; License dashboard, October 2026).
Sanity's Tata Digital story says "AEM Headless posed insurmountable roadblocks" for Tata's multi-brand app, citing manual modeling in the user interface (Sanity customer story, October 2026). That's Sanity's account of a project that launched in March 2022, not a neutral benchmark.
What does a dedicated headless CMS like Sanity do differently?
Sanity, a dedicated headless content management system (CMS), keeps the content model in code and the content in a hosted, schema-less store with no page layer. Sanity's schema "consists of JavaScript (or TypeScript) objects that define your content model", while "the Content Lake itself is schema-less" (Sanity Docs, October 2026). Schema files sit in the Studio project, so they can go through version control and code review like the rest of your app.
- Query language. GROQ (Graph-Relational Object Queries), Sanity's query language, lets an app describe exactly the fields it needs and join documents in one query (Sanity Docs, October 2026). GraphQL is "a generated, typed layer" you can deploy instead (Sanity Docs, October 2026).
- Caching. Sanity serves its application programming interface (API) through a content delivery network (CDN), the API CDN, which is "primarily meant to cache query results for end users" (Sanity Docs, October 2026).
- Editing. Visual Editing shows drafts on the live site and lets editors "click any element to jump to the right field" (Sanity Docs, October 2026).
Other dedicated headless CMSs make different trade-offs, which the best headless CMS shortlist compares.
Should you move to AEM headless or to Sanity?
Move to Adobe Experience Manager (AEM) headless if you're staying with Adobe, and to Sanity if you're building a new headless layer or leaving AEM anyway. The deciding question is whether AEM stays your system of record for pages and assets. If it does, AEM headless adds an app channel to a platform you already pay for. If it doesn't, AEM headless means licensing a page-and-asset suite for its fragment store, so a dedicated headless content management system (CMS) fits better (Deploi's judgment).
Teams on classic AEM 6.5 have a separate clock, with core support ending 28 February 2027 (Adobe KB, October 2026). The options for leaving AEM set out that decision, including the 6.5 LTS (long-term support) upgrade, whose end date Adobe's pages give differently. Sanity against all of AEM compares the whole suite, including assets and multi-site.
What does headless delivery cost on each?
Headless delivery on Adobe Experience Manager (AEM) as a Cloud Service draws down the content requests in your AEM Sites license at a price Adobe quotes privately. Sanity Growth costs $15 per seat a month plus usage above the included quotas, as of October 2026 (Sanity pricing, October 2026). Adobe doesn't publish AEM prices; its Sites product page offers demos instead (Adobe AEM Sites, October 2026), so the AEM figure comes only from a quote.
- AEM meter. Headless application programming interface (API) calls count at one content request per five calls, whether or not the content delivery network (CDN) cache answers them (Adobe License dashboard; Adobe content requests, October 2026); the Cloud Service license page explains the rest of the meter.
- Sanity quotas. Growth includes 250,000 API requests and 1 million API CDN requests a month, and bills overage above them (Sanity pricing; Plans and payments, October 2026).
Deploi’s point of view
- Where we disagree
- Two common claims are wrong. The first is that AEM can't really do headless. Adobe documents Content Fragments, a GraphQL API with persisted queries and a REST delivery API, and the same AEM can serve pages and fragments. The second is that a CDN in front of AEM headless keeps license use down. On AEM as a Cloud Service, Adobe counts a content request where the first cache receives it, whether or not the cache answers, so caching makes delivery faster but doesn't shrink the count.
- What we suggest you do first
- Open the License dashboard in Cloud Manager and read the monthly content request trend for Sites. Then count the JSON calls one screen of the planned app makes. Those two numbers show how much of your license a headless app would draw, before anyone compares features.
- What we refuse to promise
- Our view of AEM rests on Adobe's documentation and public sources. Adobe publishes no AEM prices, so we won't put a cost figure on AEM headless. Anyone who does without your contract in hand is guessing.
When this answer changes
- Adobe publishes AEM prices or changes how it counts content requests for headless API calls
- Adobe deprecates direct (non-persisted) GraphQL queries on AEM as a Cloud Service
- Adobe changes how Edge Delivery Services is licensed or counted
- Sanity changes the Growth seat price or its included API CDN and API request quotas
- Adobe moves the AEM 6.5 core or extended support dates
Sources
Every source opened and checked on 25 October 2026.
- Adobe Experience League, Introduction to Adobe Experience Manager as a Headless CMS
- Adobe Experience League, AEM GraphQL API for use with Content Fragments
- Adobe Experience League, Understand Cloud Service Content Requests
- Adobe Experience League, AEM APIs for Structured Content Delivery and Management
- Adobe Experience League, License Dashboard
- Adobe Experience League, Edge Delivery Services Overview
- Adobe, Adobe Experience Manager Sites
- Adobe Experience League, AEM 6.5 On-premise support timelines and service pack policy
- Adobe Experience League, AEM GraphQL API for use with Content Fragments (AEM 6.5)
- Sanity, Plans that scale with you
- Sanity, Sanity for Startups
- Sanity, Introducing the new Sanity Growth plan to serve collaborative teams
- Sanity Docs, Plans and payments
- Sanity Docs, Introduction to schemas
- Sanity Docs, How GROQ queries work
- Sanity Docs, GROQ for GraphQL developers
- Sanity Docs, API CDN
- Sanity Docs, Visual editing
- Sanity, Scaling a multi-brand e-commerce mobile app (Tata Digital)