Stripe ships 65KB llms.txt, but founder sites lack it, reveals asymmetry

Dry_Steak30 · reddit · 2026-09-01

The author tested /llms.txt deployment across 12 major tech companies. Eight, including PostHog (375KB) and Stripe (65KB), serve the file to help models understand their products. However, Anthropic and LangChain return 404, while OpenAI and Perplexity block access (403). Notably, while companies optimize for models, the founders' personal sites (Patrick Collison, Paul Graham) do not offer it. This highlights an asymmetry: social platforms (LinkedIn, Instagram) block AI crawlers, forcing models to rely on stale bios or old pages for personal data. The author questions if the link-list structure of llms.txt fits people (who need provenance) and whether adding new pages actually displaces outdated info in model outputs.

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