Castle
Verified live by HTTP probe across 34 observations. Pulse momentum is positive over 30 days (+7.2).
HTTP liveness
realSignal telemetry
4 families · 2 observed · observed onlycastle.ioedge
direct originserver
NetlifyTranco rank
#37,852
Analyst read
generated from the observed metrics above · no external narrativeCastle's listed site resolved live when we last probed it on Aug 27, 2026, so we mark it verified alive. Its Pulse Index is 48.4 of 100, built from 2 of 4 observed signal families. Observed footprint: 7 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 |
|---|---|---|---|---|---|
| Oktadesign | curated | — | 11.3 | +3.3 | — unverified |
| LaunchKeysecurity | similar | 86% | 8.0 | 0.0 | — unverified |
| Fairwinds Insightsdev-tools | tag-overlap | 75% | 45.0 | 0.0 | ● live |
| Digital Signing 2.0 by Attoresfinance | tag-overlap | 75% | 8.0 | -8.0 | — unverified |
| ThinAirsecurity | similar | 75% | 16.0 | 0.0 | → redirected |
| Microsoft Azure| Blockchain as a Service (BaaS)dev-tools | tag-overlap | 75% | 0.0 | 0.0 | ■ inactive |
| ITAnyWhere Clouddev-tools | tag-overlap | 71% | 40.0 | 0.0 | ● live |
| Docker PAASdev-tools | tag-overlap | 71% | 35.2 | -4.8 | ● 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.