AI readiness leaderboard · Email marketing

AI readiness of buttondown.com: 100/100

100/100

We checked buttondown.com on 2026-10-18 with our free checker: six scored tests plus evidence for each finding. The score reflects the site on that date. The site may have changed after that date.

Test	Result	Points
llms.txt	Yes	15 of 15
JSON-LD schema on the homepage	Yes	20 of 20
Meta description	Yes	10 of 10
Text readable without JavaScript	Yes	20 of 20
Sitemap	Yes	10 of 10
AI crawlers allowed in robots.txt	8 of 8	25 of 25

Compared with Email marketing

buttondown.com ranks 4 of 21 email marketing sites in this scan (ties share the order by domain name). The median score in this group is 100. 15 of 21 have an llms.txt file.

Findings with evidence

FixJSON-LD: 4 blocks, types BreadcrumbList, ListItem, Organization, ImageObject, Person, ContactPoint, SoftwareApplication, MonetaryAmount, DefinedRegion, ShippingDeliveryTime, QuantitativeValue, MerchantReturnPolicy, WebSite, WebPage

Person is missing recommended url. Organization is missing recommended logo, sameAs. WebSite is missing required name. WebPage is missing recommended name.

Fix: Fix the listed properties, then retest at validator.schema.org.

ImproveServer responded in 939 ms

Time to response headers from our checker. Final URL: https://buttondown.com/

Fix: Slow responses can make crawlers give up. Add page caching or a CDN in front of the homepage.

19 checks passed or noted

PassGPTBot (OpenAI, training): allowed on /

User-agent: *
Disallow: /emails/
Disallow: /api/*
Group "*" has no rule for /.

PassOAI-SearchBot (OpenAI, ChatGPT search): allowed on /

User-agent: *
Disallow: /emails/
Disallow: /api/*
Group "*" has no rule for /.

PassChatGPT-User (OpenAI, live fetch for users): allowed on /

User-agent: *
Disallow: /emails/
Disallow: /api/*
Group "*" has no rule for /.

PassClaudeBot (Anthropic, training): allowed on /

User-agent: *
Disallow: /emails/
Disallow: /api/*
Group "*" has no rule for /.

PassClaude-SearchBot (Anthropic, Claude search): allowed on /

User-agent: *
Disallow: /emails/
Disallow: /api/*
Group "*" has no rule for /.

PassPerplexityBot (Perplexity, search index): allowed on /

User-agent: *
Disallow: /emails/
Disallow: /api/*
Group "*" has no rule for /.

PassGoogle-Extended (Google, Gemini training control): allowed on /

User-agent: *
Disallow: /emails/
Disallow: /api/*
Group "*" has no rule for /.

PassCCBot (Common Crawl, open dataset): allowed on /

User-agent: *
Disallow: /emails/
Disallow: /api/*
Group "*" has no rule for /.

Passllms.txt found and well formed

First line: "# Buttondown". 6 ## sections, 7 links, 2908 bytes.

NoteNo llms-full.txt

GET /llms-full.txt returned 404.

Fix: Optional: publish /llms-full.txt with the full text of key pages for tools that want more than a map.

PassTitle, 52 characters

<title>Buttondown — Newsletter software for people like you</title>

PassMeta description, 122 characters

content="Buttondown is the last email platform you&#x27;ll migrate to. We&#x27;re focused on your success, not on bleeding you dry."

PassOpen Graph tags present

og:title: Buttondown — Newsletter software for people like you
og:description: Buttondown is the last email platform you&#x27;ll migrate to. We&#x27;re focused on your …
og:image: http://localhost:3000/opengraph-image

PassCanonical link set

<link rel="canonical" href="https://buttondown.com">

PassLanguage declared: en

<html lang="en">

Pass1 H1 heading

<h1>Why is running a newsletter so hard?</h1>

Pass4,809 characters of text without JavaScript

Text starts: "Buttondown — Newsletter software for people like you Buttondown Features Resources Search Pricing Log in Build your newsletter Sign up Why is running a newslet…"

PassSitemap found, 856 URLs

robots.txt: Sitemap: https://buttondown.com/sitemap.xml
GET https://buttondown.com/sitemap.xml returned 200.

PassHTML size 110 KB, 24 script tags

1 render-blocking script in <head>: /_next/static/chunks/0cz1d0mv5g_q7.js

Fix: Add defer or async to scripts in <head> that are not needed for first paint.

Is this your site? Run a fresh free check. Get the $19 deep report (up to 25 pages, 18 AI agents per path), or add an AI-ready badge after your check.

See how all 21 email marketing sites compare: common problems, real evidence and the full table.

Scoring: llms.txt 15, JSON-LD 20, meta description 10, readable text 20, sitemap 10, AI crawler access 25. Want this page changed or removed? Email [email protected].

AI crawler and llms.txt updates

Get an email when AI crawlers, robots.txt rules, or llms.txt practice change. At most twice a month.

We send a confirmation link first. See the privacy policy.