Nebula Components
Discover Free Landing Page Resources, Tools, and Guides
Open-source tools built from real problems on real sites. Each one addresses a specific, reproducible failure mode we encountered while diagnosing and fixing landing pages.
This page collects Nebula's published research, diagnostic specifications, benchmark data, and learning resources. All content is freely available and citable. Data sources are linked where applicable.
Specification
Landing Page Diagnostic Spec v1
The canonical, versioned definition of what a Nebula audit checks: all nine conversion signals with decision rules, severity bands, the evidence record attached to every finding, and pass/fail examples. The machine-readable contract behind every audit result.
Open Source CLI
Citable
The open evidence layer beneath Nebula for defensible SEO, AEO, and GEO audits. 181 detectors across 19 namespaces - technical retrieval, entity identity, claim governance, agent-readiness, and more. Evidence packages on every run. Apache 2.0.
Paid traffic diagnosis
Ecommerce landing page audit
Inspect the page-side conditions that can interrupt paid traffic before changing targeting or bidding.
AI search readiness
AI readiness checks
Inspect entity clarity, structured consistency, crawl access, and citation-ready content.
Diagnostic method
Page-intent-aware audit
See how audit signals change for landing pages, SEO content, FAQs, explainers, and checkout pages.
CRO methodology
Conversion rate optimization audit
Reduce uncertainty before a redesign, A/B test, or ongoing optimization engagement.
Commercial model
CRO alternative without a retainer
Understand why diagnosis can come before an ongoing CRO engagement.
Why we build in the open
Every tool here started as an internal need. Citable was built because we needed a reproducible, evidence-backed way to audit whether a site was actually retrievable by search engines and AI systems - not just whether it looked correct. Generic SEO dashboards gave opinions. We needed deterministic observations with evidence packages.
Open-sourcing these tools means the diagnostics are transparent and the findings are reproducible. If a Citable audit says your robots.txt blocks AI retrieval, anyone can verify that independently. That's the operating premise: evidence over opinion, at every layer.
Citable is the open verification layer; Nebula is the commercial application built on top of it. Citable defines what can be supported. Nebula turns supported observations into conversion diagnostics, repairs, and follow-up decisions.
Guides and references
Methodology
How Nebula audits landing pages
The 9-signal diagnostic process, step by step.
Concepts
Nebula concepts
Definitions and framework for the 9-signal audit.
FAQ
Frequently asked questions
What the audit checks, what it does not, and how the repair sprint works.
Dataset
Observatory: landing page failure rates
Corpus eligibility and publication status. Historical scores and rates are withdrawn; condition rates require comparable evidence.
About
What is Nebula Components?
Evidence-based landing page diagnostics for founders running paid traffic.
Comparison
AI SDR vs landing page audit
Why audit the page before deploying an AI sales agent.
Ecommerce
7 systems every ecom brand needs
The systems most ecommerce brands skip that cost them conversions.