Zotero
Verified live by HTTP probe across 36 observations. Pulse has been flat over the last 30 days.
HTTP liveness
realSignal telemetry
4 families · 2 observed · observed onlyzotero.orgedge
direct originserver
ApacheTranco rank
#5,302
Analyst read
generated from the observed metrics above · no external narrativeZotero's listed site resolved live when we last probed it on Aug 27, 2026, so we mark it verified alive. Its Pulse Index is 49.5 of 100, built from 2 of 4 observed signal families. Observed footprint: 13 functional tags. It sits on the competitive-alternatives graph with 1 linked rival, so the comparable set below leans on curated edges.
Comparable set
curated alternatives → functional tag-similarity| Company | Basis | Overlap | Pulse | 30d Δ | Status |
|---|---|---|---|---|---|
| Wikipediaeducation | similar | 60% | 40.0 | +32.0 | ● live |
| Project Gutenbergentertainment | tag-overlap | 57% | 49.7 | 0.0 | ● live |
| Academic Torrentseducation | similar | 54% | 45.9 | 0.0 | ● live |
| Arxiv Vanityeducation | similar | 54% | 46.8 | 0.0 | ● live |
| Open Access Buttoneducation | similar | 54% | 44.3 | 0.0 | ● live |
| OpenStaxeducation | similar | 54% | 48.9 | 0.0 | ● live |
| The Open Syllabus Projecteducation | similar | 54% | 16.5 | 0.0 | → redirected |
| Open LaTeX Project v1education | similar | 53% | 40.0 | 0.0 | ● live |
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.