Reserved for 21st.dev

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21st.dev

21st.dev

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AEO Score: 4/10

Monitoring for AI engine activity

In the Engagemii AEO index

1code.dev

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What this score means

Your AEO score measures whether AI search engines (ChatGPT, Claude, Perplexity, Gemini) can actually read your site and cite it in answers. Two-thirds of websites are invisible to them. 21st.dev just got measured.

4/10 means 21st.dev is borderline visible. AI bots can crawl your site but your structured-data signals are thin. You are at risk of being skipped when buyers ask AI for a recommendation.

About 21st.dev

Open source coding agent client. Switch between Claude Code and Codex, take the best of each, ship with the best UI.

Key Topics

A calm, visual client for parallel work.

Details

Industry: Technology

1code.dev

AI Visibility Breakdown

1

Structured Data

9

Content Structure

5

Entity Clarity

3

E-E-A-T Signals

6

Technical AEO

2

AI Discoverability

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Your full 6-category score breakdown

Exact fixes: robots.txt, schema, llms.txt

AI bot crawls from ChatGPT, Claude, Perplexity, Gemini

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Picked for 21st.dev: Tech & Electronics

Tech Shoppers Do More Research Than Anyone. Are You There When They're Looking?

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Source & Attribution

Scored by Engagemii on July 2, 2026. Methodology: engagemii.com/aeo/methodology

Source URL: https://engagemii.com/aeo/brands/1code-dev

Cite this score: Engagemii (2026). "AEO Score for 21st.dev." Retrieved from https://engagemii.com/aeo/brands/1code-dev

Licensed under CC BY 4.0. You may reuse this data with attribution: a visible link to engagemii.com.

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