# PageLint > AI-powered landing page copy auditor for indie SaaS founders. > 55 checks traced to Ogilvy, Cialdini, Schwartz, and CXL Institute research. > Every recommendation cites its source. ## Core pages - Principles (full 55-check methodology): https://pagelint.dev/principles - Research library (15 cited articles): https://pagelint.dev/research - Pricing (free first audit, $12 pack, $19/mo): https://pagelint.dev/pricing ## Research articles - Cialdini's 7 principles for landing pages: https://pagelint.dev/research/cialdini-7-principles - Schwartz awareness states explained: https://pagelint.dev/research/schwartz-awareness-states - Single dominant H1 — what the headline arithmetic means: https://pagelint.dev/research/cl-1-single-dominant-h1 - The Clarity lens — 8 checks for landing pages: https://pagelint.dev/research/clarity-lens-overview - Ogilvy on Advertising — the landing page guide: https://pagelint.dev/research/ogilvy-on-advertising-guide ## About Built by Danylo, solo founder. Launched 2026. Contact: hi@pagelint.dev