BigDataSEO.com
The canonical resource for crawl architecture at scale. Built by Tony Aly.
Why This Exists
SEO has a scale problem. The frameworks, tools, and best practices that work for sites with thousands of pages break catastrophically when applied to sites with millions. Pagination chains that crawlers abandon. Faceted navigation that generates billions of duplicate URLs. Category trees so deep that most products never get crawled.
These aren't edge cases — they're the default outcome when conventional SEO meets large-scale datasets. And yet, the SEO industry largely ignores them because most practitioners work on smaller sites.
BigDataSEO.com exists to change that. It's a single, opinionated resource focused entirely on the structural problems that emerge at scale — and the architecture patterns that solve them.
What We Publish
- RIBA Specification The formal specification for Root-Indexed Browse Architecture — a mathematical framework for building crawl-efficient browse hierarchies.
- Free SEO Tools 10 browser-based calculators for crawl budget estimation, root page calculation, duplicate detection, and more.
- Public Audits RIBA audits of major websites, showing how the largest sites on the internet handle (or fail at) crawl architecture.
- Dataset Generator Upload your dataset and get a complete RIBA score, browse architecture, sitemaps, and schema templates.
- RIBA Registry A public directory of sites implementing RIBA, with verified and self-reported entries.
About Tony Aly
Tony Aly is a technical SEO practitioner who specializes in crawl architecture for large-scale websites. He created RIBA (Root-Indexed Browse Architecture), the mathematical framework for building crawl-efficient browse hierarchies at any scale.
With over 10 years of experience in technical SEO and more than 500 million pages architected, Tony has worked with e-commerce catalogs, classifieds platforms, job boards, real estate sites, and content publishers. His focus is exclusively on the structural problems that break SEO at scale.
BigDataSEO.com is the culmination of that work — everything he's learned, formalized into a specification, built into tools, and made available to the industry.
Principles
Practitioner-First
Everything here is built by someone who does this work, not someone who writes about it. Theory is tested against real sites with real crawl data before it gets published.
Open by Default
The RIBA specification, the tools, the public audits, and the blog content are all freely available. The generator is free up to 250,000 pages. Knowledge about crawl architecture shouldn't be gated.
Scale Is the Filter
This site deliberately ignores topics that work fine at small scale. If your site has fewer than 10,000 pages, you probably don't need what's here. That's a feature, not a bug.
Measurable Outcomes
RIBA scores, crawl coverage percentages, indexation rates — everything is quantified. Opinions are cheap; data is what matters.