Where every number comes from

Primary source for global Traffic Rank (top 1M domains)

Method

Tranco is a research-grade aggregator that combines the four major public top-million lists (Alexa, Cisco Umbrella, Majestic, Quantcast) into a single resilient ranking, refreshed daily. Originally published by KU Leuven researchers — the methodology paper is peer-reviewed and reproducible.

Refresh

Refreshed daily by Tranco; cached in our system for 7 days per domain.

Accuracy

Covers the top 1,000,000 domains globally. For sites in this range, position is highly accurate (we benchmark inside ±5% against SimilarWeb's paid tier). Outside top-1M, we fall back to OpenPageRank.

Primary source for Domain Authority (DA) + Backlink count + Referring Domains

Method

Moz's DA score is a 100-point logarithmic measure of a domain's backlink-graph quality, computed across their proprietary Mozscape index (40+ trillion links crawled). We query the Links API directly using a paid commercial license.

Refresh

Live queries with a 30-day per-domain cache (protects paid quota).

Accuracy

Industry-standard SEO metric used by 5+ million marketers. Limitation: DA can lag for very new sites (under ~3 months old) because Mozscape crawls less frequently than Google.

Primary source for Domain Rating (DR); fallback for Traffic Rank beyond top 1M

Method

Open-source recreation of Google's original PageRank, built on the Common Crawl corpus. OpenPageRank publishes a raw 0–10 logarithmic backlink-authority score; we linearly rescale it ×10 so the DR Checker reports a 0–100 number — the convention every SEO reader knows from Ahrefs. The underlying signal is unchanged; only the presentation scale differs.

Refresh

Refreshed every 3 months by DomCop; we cache responses for 7 days per domain. Free tier is 1,000 lookups / month, so we cap each visitor to 2 checks per 24h (max 2 distinct domains) to protect the shared quota.

Accuracy

Excellent for relative comparisons. The `rank` field is backlink-authority weighted — NOT traffic weighted, which is why we use Tranco for the Traffic Rank tool and reserve OPR for the DR Checker + long-tail rank fallback.

Primary source for SERP Position Checker + Google Index Checker

Method

Wraps live Google SERP scraping with residential IPs so results match what a real user in the chosen region sees. Returns the top 100 results including positions, snippets, knowledge-graph hits, and AI Overviews.

Refresh

Live queries on every check, cached for 7 days per (domain, keyword, region, device).

Accuracy

Within ±1 position of a manual Google check 95%+ of the time (the remaining 5% reflects Google's natural per-user/per-session ranking variance).

Secondary fallback for SERP + Index Checker (when Serper quota dips)

Method

Same approach as Serper — live Google SERP scraping with location-aware proxies. We use it as a quality-equal backup so the tool keeps working when one provider's free tier resets.

Refresh

Live queries, 7-day cache.

Accuracy

Identical to Serper for our use case.

Primary source for Lighthouse Score + Page Speed

Method

Google's own Lighthouse engine, run on Google's infrastructure against your live URL. Returns the four sub-scores (Performance, SEO, Accessibility, Best Practices) plus Core Web Vitals.

Refresh

Live queries, 24-hour cache per URL.

Accuracy

This IS the source Google uses to rank your site for performance — the score you see here is the exact same one Google sees.

Primary source for tracked sites' traffic & rank — REAL data

Method

Sites that install any FeedPulse widget become part of our cooperative analytics network. We aggregate anonymous visit data across all installed sites to produce REAL traffic ranks (not estimates) for member domains. Same idea Alexa used pre-shutdown.

Refresh

Live every 6 hours; aggregated visit data is bot-filtered.

Accuracy

100% real measurement, not modeling. Only available for domains that have a FeedPulse widget installed.