PerfDelta vs Xt4b

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

PerfDelta compared with Xt4b
Detail	PerfDelta	Xt4b
What it does	Free website speed test measuring multiple pages with Core Web Vitals, lab metrics, competitor benchmarks and AI recommendations	SEO content that acquires customers
Stage	Not given	Not given
Founded	Not given	Not given
Based in	DE	Not given
Pricing model	Freemium	Freemium
Pricing	Free: test up to 3 pages with manual measurements only. Solo: €23/month or €230/year (25 monitored URLs, daily or weekly monitoring, 600 tests/month). Agency: €59/month or €590/year (150 monitored URLs, monitoring every 6 hours, 4,000 tests/month). Scale: €119/month or €1,190/year (500 monitored URL	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	Tests multiple pages automatically from sitemap Competitor benchmark comparison with up to 4 competitors Shows Core Web Vitals from real Chrome users PageSpeed history tracking over time Performance budgets with email alerts Shareable reports with 365-day links REST API and MCP access for AI agents	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 several pages simultaneously instead of one URL at a time Combines field data from real users with lab metrics in one report Built-in competitor benchmarking against up to 4 domains Industry-specific benchmarks showing what is normal in each sector No sign-up required for free testing on any website	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 votes	0	0
DR (Domain Rating by Ahrefs)	3 no change since last check	16 no change since last check
Trust Flow (Majestic)	0	4
Citation Flow (Majestic)	15	17
Referring domains (Majestic)	2	6

5 details filled in for both companies.

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