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PostHog

Open-source product analytics platform with session replay, feature flags, and experiments.

Source subject: posthog.com · Public evidence only

ARCHITECTURE.md

Generated as educational analysis. Inferences are hypotheses, not source-code claims.

Observation

  • Analyzed 3 public page(s) on posthog.com.
  • Public paths: /, /products, /pricing

Inference

  • Rendering and service boundaries cannot be proven from HTML alone.

Recommendation

  • Choose the smallest deployable architecture that meets latency, SEO, and data needs.

DECISIONS.md

Generated as educational analysis. Inferences are hypotheses, not source-code claims.

Observation

  • Evidence base includes 3 fetched page(s).

Inference

  • Visible product choices suggest tradeoffs but do not reveal the original team’s rationale.

Recommendation

  • Record each decision with context, alternatives, consequences, and a review date.

BUILD_WITH_THIS.md

Generated as educational analysis. Inferences are hypotheses, not source-code claims.

Observation

  • Reference site: https://posthog.com
  • Most visible content themes: 2: Who's using PostHog? · 2: PostHog data stack, built for data teams and loved by product teams · 2: Usage-based pricing · 2: Why PostHog? · 2: Bedtime reading · 2: Shameless CTA · 1: Devtools and product data infrastructure for building successful products · 3: Get started

Inference

  • The reference patterns may be useful for products with similar user jobs, not merely a similar appearance.

Recommendation

  • Start from the user problem, reuse principles selectively, and build original assets and copy.

SITEMAP.md

Generated as educational analysis. Inferences are hypotheses, not source-code claims.

Observation

  • Discovered path: /
  • Discovered path: /products
  • Discovered path: /pricing

Inference

  • Only crawled and sitemap-discovered public URLs are represented.

Recommendation

  • Treat this as a partial inventory and validate against product analytics and content ownership.

COMPONENTS.md

Generated as educational analysis. Inferences are hypotheses, not source-code claims.

Observation

  • Observed forms: 0
  • Observed calls to action: Product OS, Pricing, Docs, Community, Company, More, Get started – free, 1, Ask a question, Switch to website mode, Zoom, Font

Inference

  • Repeated structures may be implemented as reusable components, but DOM output cannot prove source boundaries.

Recommendation

  • Create components around behavior and responsibility, not visual resemblance alone.

STACK_GUESS.md

Generated as educational analysis. Inferences are hypotheses, not source-code claims.

Observation

  • React: react
  • PostHog: posthog
  • React: react
  • PostHog: posthog
  • React: react
  • Supabase: supabase.co
  • PostHog: posthog

Inference

  • Technology detection is probabilistic because production builds can remove or disguise signatures.

Recommendation

  • Verify stack choices using public engineering sources before adopting them.

DESIGN.md

Generated as educational analysis. Inferences are hypotheses, not source-code claims.

Observation

  • Observed colors: rgba(0,0,0,0), #e9e9e9, #abe2fb, #fff, #96dbfa, #57c5f7, #999, #666, #ccc, #6c6c6c, #d9d9d9, rgba(59,130,246,.5)
  • Observed font families: Source Code Pro, IBM Plex Sans Variable, IBM Plex Sans Variable,IBM Plex Sans,-apple-system,BlinkMacSystemFont,avenir next,avenir,segoe ui,helvetica neue,helvetica,Ubuntu,roboto,noto,arial,sans-serif, ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace, inherit, Times New Roman,Times,serif, Helvetica,Arial, Source Code Pro,Menlo,Consolas,monaco,monospace, Comic Sans MS,Comic Sans,Arial Rounded MT Bold,Helvetica Rounded,Arial,sans-serif, Computer Modern,sans-serif, Fairytale,sans-serif, -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol, Open Runde,sans-serif, Charter,MatterVF,Arial,Helvetica,sans-serif, Squeak,sans-serif, IBM Plex Sans Variable,IBM Plex Sans,-apple-system,BlinkMacSystemFont,avenir next,avenir,segoe ui,helvetica neue,helvetica,Ubuntu,roboto,noto,arial,"sans-serif"!important, monospace!important, Consolas,monaco,monospace, Arial,sans-serif, Impact,sans-serif

Inference

  • Repeated tokens may indicate a shared design system; external stylesheets were not executed or downloaded.

Recommendation

  • Define semantic color and type tokens before copying visual treatments.
  • Validate contrast and responsive behavior in the target product context.

IA.md

Generated as educational analysis. Inferences are hypotheses, not source-code claims.

Observation

  • Navigation labels: home.mdx, Product OS, Pricing, customers.mdx, demo.mov, Docs, Talk to a human, Sign up ↗, Why PostHog?, Changelog, Company handbook, Store, Work here, Trash, Terms, Privacy, DPA, SOC 2, HIPAA, home.mdx
  • Heading outline: 2: Who's using PostHog? · 2: PostHog data stack, built for data teams and loved by product teams · 2: Usage-based pricing · 2: Why PostHog? · 2: Bedtime reading · 2: Shameless CTA · 1: Devtools and product data infrastructure for building successful products · 3: Get started · 2: Data platform · 3: Data I/O · 3: Manage & query · 2: Automatic tooling · 3: Understand product usage · 3: Debug & fix issues · 3: Ship features & get feedback · 2: Data exploration · 3: PostHog AI demos · 3: Product Analytics · 2: Product Analytics · 3: Session Replay

Inference

  • Repeated navigation labels likely represent primary information architecture.

Recommendation

  • Model user tasks first, then test whether this hierarchy fits them.