This page is designed to help you find out whether PerfDelta is good and if it is the right choice for you.
PerfDelta is a website speed test and Core Web Vitals monitoring tool built around comparison. Google PageSpeed Insights tests one URL and returns one score. PerfDelta tests several pages of a site, places the results next to competitors and a benchmark of every domain tested so far, and stores the history of every measurement.
Free test, no account needed:
Paid plans monitor 25 to 500 URLs daily or weekly, Agency and Scale also every 6 hours, track 3 to 10 competitors, send email alerts on drops and a weekly report, and keep the full history with notes. They add performance budgets, PDF export, a REST API, an MCP server for AI agents and agent briefs for coding agents, and from the Agency plan white-label PDFs, CSV export, a public status dashboard, team seats and industry benchmark data. A free account includes MCP and REST API access with one scan every 24 hours.
PerfDelta is built for SEO specialists, agencies and in-house web teams who need to show how a site performs against its competitors, not just in isolation.
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Competitor benchmarking
Competitor comparison with up to two domains and delta badges per metric
Real-user data (CrUX)
Real-user field data from the Chrome UX Report (LCP, INP, CLS, FCP, TTFB)
Lighthouse lab data
Lighthouse lab metrics per page, worst first
Multi-page scan
Three pages per run on mobile and desktop, from the sitemap or chosen manually
AI recommendations
AI fix recommendations tailored to the detected tech stack
Tech stack detection
CMS, framework, server, CDN
Monitoring
Monitoring of 25 to 500 URLs daily or weekly, every 6 hours from Agency
MCP server
MCP server and REST API in all paid plans (free account: one scan every 24 hours)
Agent briefs
Markdown work orders for coding agents such as Claude Code or Cursor, with prioritized fixes, stable IDs, affected files and acceptance criteria
Performance budgets
Performance budgets per project and URL: status in the report, a warning before the limit, an email when one is crossed, CI check via MCP
PageSpeed Insights tests one URL and shows one score. PerfDelta tests three pages per run, puts the results next to up to two competitors and a benchmark of every domain tested so far, and keeps the history of every measurement.
The free speed test that shows whether your Core Web Vitals beat your competitors'. It uses the same Google data sources as PageSpeed Insights, plus several pages per run, competitor comparison, a cross-domain benchmark, stored history and monitoring. Compared with GTmetrix, real-user CrUX field data is shown before lab data, and a competitor comparison is included in the free test.
SEO agencies and freelancers who report Core Web Vitals to clients and need a competitor view. In-house SEO and web teams at e-commerce, SaaS and publishing companies who watch key templates after releases. Technical SEO consultants who need field data, lab data, affected files and tech stack in one report. Developers who run scans from AI agents via MCP or from their own tools via REST.
PerfDelta was built because PageSpeed Insights tells you how fast your site is, but not whether you're faster than the sites you compete with. Founder Christian Schreiber has worked on SEO and web performance for more than 15 years and launched PerfDelta in Berlin in 2026.
We have collected here some useful links to help you find out if PerfDelta is good.
Check the traffic stats of PerfDelta on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.
Check the "Domain Rating" of PerfDelta on Ahrefs. The domain rating is a measure of the strength of a website's backlink profile on a scale from 0 to 100. It shows the strength of PerfDelta's backlink profile compared to the other websites. In most cases a domain rating of 60+ is considered good and 70+ is considered very good.
Check the "Domain Authority" of PerfDelta on MOZ. A website's domain authority (DA) is a search engine ranking score that predicts how well a website will rank on search engine result pages (SERPs). It is based on a 100-point logarithmic scale, with higher scores corresponding to a greater likelihood of ranking. This is another useful metric to check if a website is good.
The latest comments about PerfDelta on Reddit. This can help you find out how popualr the product is and what people think about it.
Do you know an article comparing PerfDelta to other products?
Suggest a link to a post with product alternatives.
Is PerfDelta good? This is an informative page that will help you find out. Moreover, you can review and discuss PerfDelta here. The primary details have been verified within the last quarter. So they could be considered up to date. If you think we are missing something, please use the means on this page to comment or suggest changes. All reviews and comments are highly encouranged and appreciated as they help everyone in the community to make an informed choice. Please always be kind and objective when evaluating a product and sharing your opinion.
