The most visible headless CMS platforms in Europe, October 2026

October 2026 · 105 questions asked from 7 countries · ChatGPT, Google AI Overviews, Gemini and Google AI Mode · 420 answers read

Leader

Sanity

71Heralded Score, range 58–75

Most cited source

youtube.com

82citations

From Google AI Mode and Google AI Overviews

Where engines disagree most

They agree

Every engine names the same top three.

Brands

Rank Brand Rank change Heralded Score All AI Search Score trend Mentioned Recommended By engine Mentioned by Change
11 Kontent.ai CZ New entry 8 , range 3–30 3#11 16#11
8
  • : score 8 · #11
4% 1% First reading
12 DatoCMS IT New entry 5 , range 2–30 3#12 9#12
5
  • : score 5 · #12
3% 1% First reading
13 Builder.io US New entry 5 , range 2–31 5#10 5#15
5
  • : score 5 · #13
3% 1% First reading
14 Umbraco DK New entry 3 , range 1–29 2#14 5#14
3
  • : score 3 · #14
2% 0% First reading
– Agility CMS CA Unranked Too few answers Not measured 6#13
–
  • : Unranked
1% 0% First reading

“=” marks brands whose score ranges overlap, so the test cannot separate them. Every brand named in at least three answers is ranked. AI and Search give each brand’s score and rank on that side alone. By engine has one dot per engine (ChatGPT, Google AI Overviews, Gemini and Google AI Mode), darker the more often it names the brand.

Most cited sources

Rank Source Type Cited in Engines Pages cited Brands its pages mention
1 youtube.com Social 12.4% 2 of 4 40 Not read
2 reddit.com Community 9.8% 2 of 4 30 12
3 progressionagency.com Consultancy 7.4% 1 of 4 1 9
4 dev.to Community 5.7% 3 of 4 6 10
5 webflow.com Vendor site 6.2% 3 of 4 4 8
6 cosmicjs.com Vendor site 4.8% 3 of 4 7 9
7 github.com Vendor site 1.7% 2 of 4 8 Not read
8 lemonhive.com Vendor site 4.3% 3 of 4 1 9
9 dupple.com Media 3.6% 1 of 4 1 8
10 g2.com Review site 3.6% 2 of 4 4 9

Questions asked

QuestionLanguageMost recommended
best headless cms for developers English Contentful, Directus, Payload, Sanity, Storyblok and Strapi, tied
headless cms for ecommerce websites English Contentful, Payload, Sanity, Storyblok and Strapi, tied
how to manage content for a website and mobile app in one place English Contentful, Sanity, Storyblok and Strapi, tied
how to migrate from a traditional cms to a headless cms English Contentful and Strapi, tied
headless cms vs traditional cms for marketing teams English Contentful and Storyblok, tied
What is the best headless CMS for a marketing website? English Storyblok
Headless content management for developer teams English Contentful, Directus, Payload, Sanity, Storyblok and Strapi, tied
How can a company publish the same content to its website and mobile app? English Sanity
How do I let marketers edit content on a site built with a JavaScript framework? English No brand recommended
Traditional CMS vs. headless CMS for a growing company website English Contentful and Sanity, tied

Each engine's top three

Method

Each leaderboard ranks brands on two sides. AI is how ChatGPT, Gemini, Google AI Overviews and Google AI Mode answer the board's buyer questions. Search is Google's top 10 results for the keywords behind those questions. All combines the two, where Search is measured.

For the AI side, each month Heralded asks every engine the same buyer questions, twice each, and reads every answer. An answer counts 0 for a brand it leaves out, 50 for a brand it names and 100 for a brand it recommends, and the Heralded Score is built from those. A brand named in at least three answers gets a score and a place.

How the leaderboards are measured