Google Books Ngram Viewer
Signal trajectory
realSignal 7.5 → 19.6 across 38 readings (+12.1). Composite of press, GitHub velocity, community heat, liveness and funding.
Cross-sectional profile
percentile rank vs 79,105 modeled productsPercentiles computed over the modeled cohort (embedding + signal + tags). Sparse dimensions — network and press — reflect that most products have zero, so a single edge or mention lifts the rank; read those with the coverage flag.
Mortality outlook
model estimateThis is a model estimate, not a verdict. 78,505 of the 79,105 modeled products are unlabeled and scored by the model only.
- LightGBM · binary mortality (dead vs surviving)
- Held-out AUC 0.71 · CV AUC 0.79 ± 0.05 · Brier 0.21
- Trained on 600 verified labels (150 dead / 450 surviving)
- Leakage-guarded: excludes status, discontinued_year, profile_maturity
- Top drivers: tag breadth, signal, vintage, liveness, business model
n=600 is thin → 95% CI on AUC ≈ ±0.10. Treat as a directional signal, not a calibrated probability.
Analyst read
generated from the metrics above · no external narrativeGoogle Books Ngram Viewer sits in the 46th percentile of Launch Sentinel's 79,105-product universe by signal, ranked #2,633 of 6,636 in Education. The mortality model puts its probability of going inactive at 0% — a model estimate with a wide confidence band. It sits on the competitive-alternatives graph with 2 linked rivals, so the comparable set below leans on curated edges. Signal momentum is roughly flat.
Comparable set
curated alternatives → functional tag-similarity| Company | Basis | Signal | P(dead) |
|---|---|---|---|
| Bungo Searchentertainment | tag-overlap | 30.0 | 56% |
| NSTMF Gravityeducation | similar | 32.9 | 6% |
| Principia Cybernetica Webeducation | similar | 22.9 | 13% |
| Ultimate Guide to Data Science Interviewseducation | similar | 15.7 | 16% |
| MOOC Listeducation | similar | 32.9 | 6% |
| 40k HN comments mentioning books, extracted using deep learningeducation | similar | 30.0 | 46% |
| GlobalClimateCrisis.orgeducation | similar | 30.0 | 56% |
| The SANS Holiday Hack Challengeeducation | similar | 15.7 | 12% |
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. Signal & P(dead) are real / model.
Structure
observed attributesFunding & team
real1 disclosed funding round on record. See the full cap table on the product profile →