Readable vs Stus.ai

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 Stus.ai
Detail	Readable	Stus.ai
What it does	Check how AI assistants read your website	AI-powered autonomous SEO agents powered by Serpstat data
Stage	Not given	Startup
Founded	Not given	Not given
Based in	ES	Not given
Pricing model	Free	Freemium
Pricing	Not given	Free plan with $3 monthly usage budget; Starter plan at $39/month; Pro plan at $199/month. Annual billing available at 10x the monthly price (2 months free). All plans include the full suite of marketing AI agents. Free plan has 1 concurrent task, Starter has 5, Pro has 10.
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	Keyword Research: discover keywords with search volume, difficulty, intent, and AI-powered clustering On-Page SEO Audit: audit titles, meta descriptions, readability, content depth, and E-E-A-T signals Competitive Niche Analysis: analyze competitor data for strategies, content patterns, and growth opportunities Traffic Quick Wins: find pages ranking 11-20 that could reach top 5 Google Ads Metrics: pull search volume, CPC, and competition data from Google Ads Content Gap Planner: find keywords competitors rank for but you don't Seasonality Detector: spot demand spikes and seasonal trends for content planning Cannibalization Detector: detect keyword conflicts between pages and get consolidation fixes Google Sheets Export: export results to Google Sheets with create, read, and update capability Third-party integrations: connect with Google Search Console, Google Analytics, Notion, and Serpstat
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	Powered by 13 years of Serpstat SEO data and 8B+ keyword database Ten AI agents that operate autonomously without manual work Full suite of agents included in all pricing tiers Agents remember project context and past decisions between sessions No setup required, start immediately with plain language commands
Community votes	0	0
DR (Domain Rating by Ahrefs)	12 +1 (up) since last check	4 no change since last check
Trust Flow (Majestic)	3	15
Citation Flow (Majestic)	18	15
Referring domains (Majestic)	5	11

4 details filled in for both companies.

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