YCombinator/Sam Altman Stanford Startup Class in PDF/Epub/Mobi Ebook Format
Liveness is unverified — no conclusive probe observation exists for the recorded URL. Pulse has been flat over the last 30 days. Observation is liveness-only: no tracked press, repository, or traffic rank — existence is confirmed, momentum is unobserved.
HTTP liveness
realSignal telemetry
4 families · 1 observed · observed only—edge
direct originserver
not reportedTranco rank
unranked
Analyst read
generated from the observed metrics above · no external narrativeYCombinator/Sam Altman Stanford Startup Class in PDF/Epub/Mobi Ebook Format's site could not be verifiably probed when we last probed it on Aug 24, 2026, so its status is unverified — we do not guess. It has fewer than two observed signal families, so no Pulse Index is composed — the evidence strip shows what is and isn’t present. Observed footprint: 7 functional tags. It has no curated competitive-alternative edges yet, so the comparable set below is functional tag-similarity — read it with the confidence flags.
Comparable set
curated alternatives → functional tag-similarity| Company | Basis | Overlap | Pulse | 30d Δ | Status |
|---|---|---|---|---|---|
| OpenStaxeducation | similar | 88% | 48.9 | 0.0 | ● live |
| Open Access Buttoneducation | similar | 88% | 44.3 | 0.0 | ● live |
| 100+ Free Machine Learning eBookseducation | similar | 78% | 43.9 | 0.0 | ● live |
| Dissemineducation | similar | 75% | 10.1 | 0.0 | — unverified |
| Indian SaaS Outlook Report 2020-21education | similar | 75% | 8.6 | 0.0 | ■ inactive |
| Sci-Hubeducation | similar | 75% | 44.4 | 0.0 | ● live |
| Climatescapeeducation | similar | 75% | 40.0 | 0.0 | ● live |
| Cat Paper Collectioneducation | similar | 75% | 9.9 | 0.0 | ■ inactive |
Confidence reflects source and category coherence: curated = an editorially linked alternative; similar = strong functional tag-overlap in the same category; tag-overlap = shared tags only and may be noisy. Overlap is the shared functional-tag ratio (Jaccard) for tag-matched rows. Pulse is the observed-activity index real and 30d Δ its signed month change; a dash means insufficient observed history, never zero.
Structure
observed attributesFunding & team
not in sourceNo disclosed funding in our sources. Funding data covers only ~1% of the corpus (462 rounds across 79K products), so absence here is unknown, not zero— we don't estimate a number we can't source.