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Readable vs Xt4b

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Readable compared with Xt4b
DetailReadable logo ReadableXt4b logo Xt4b
What it doesCheck how AI assistants read your website SEO content that acquires customers
StageNot given Not given
FoundedNot given Not given
Based inES Not given
Pricing modelFree Freemium
PricingNot given Free trial: 7 days free (no card required) covering one language line including plan, calendar, writing and publishing. Paid: $19 per website, per language, per month. Includes plan, writing, review pass, images, blog hosting, plumbing (canonical URLs, sitemap, structured data), reporting, and API a
Key features
  • Check HTML rendering without JavaScript execution
  • Test robots.txt for ChatGPT, Claude, Perplexity, Gemini, Copilot and other AI assistants
  • Detect Cloudflare and other protection systems
  • Analyze title, description, language, canonical address and headings
  • Review structured data and FAQ markup
  • Check llms.txt and sitemap
  • Extract contact information from page text
  • Identify the site's technology platform
  • Open source MIT licensed engine
  • Reads existing pages and sitemap to plan posts avoiding topic duplication
  • Generates content plan across buyer journey stages (research, comparison, commercial)
  • Automatically writes posts with meta titles, descriptions and internal links
  • Generates cover and in-article images for each post
  • Hosts blog on your own domain with sitemap and structured data
  • Read-only API access to all published posts as JSON
  • WordPress plugin to pull published posts as native WordPress posts
  • Support for 116 languages with independent plans per language
What makes it different
  • Tests how multiple AI assistants read your site simultaneously
  • Provides tailored recommendations based on your site's technology
  • Fully free with no login required
  • Open source engine available for command line use
  • Avoids content cannibalization by treating existing pages as forbidden topics
  • Plans and publishes content on a continuous cadence even when your team is busy
  • Each language market planned independently based on local search behavior, not translations
  • Complete pipeline from plan to published post with no handoffs or manual steps required
  • No per-article or per-word costs; one flat monthly fee regardless of output volume
Community votes00
DR (Domain Rating by Ahrefs)12 +1 (up) since last check16 no change since last check
Trust Flow (Majestic)34
Citation Flow (Majestic)1817
Referring domains (Majestic)56

4 details filled in for both companies.

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