Ray Wenderlich
The recorded URL now redirects offsite — often an acquisition, rebrand, or wind-down; the destination is recorded in the telemetry below. Pulse has been flat over the last 30 days.
HTTP liveness
realSignal telemetry
4 families · 2 observed · observed onlykodeco.comedge
direct originserver
not reportedTranco rank
#107,831
Analyst read
generated from the observed metrics above · no external narrativeRay Wenderlich's listed URL redirected off its original domain (to https://www.kodeco.com/books/rxswift-reactive-programming-with-swift) when we last probed it on Aug 27, 2026 — we mark it redirected, not dead. Its Pulse Index is 23.4 of 100, built from 2 of 4 observed signal families. Observed footprint: 6 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 |
|---|---|---|---|---|---|
| Learn Swifteducation | similar | 83% | 40.0 | 0.0 | ● live |
| Code Schooleducation | similar | 83% | 15.4 | 0.0 | — unverified |
| Code Schooleducation | similar | 83% | 15.4 | 0.0 | — unverified |
| Swift Guideseducation | similar | 83% | 8.0 | 0.0 | — unverified |
| Unicastseducation | similar | 83% | 0.0 | 0.0 | ■ inactive |
| LearnSwift.tipseducation | similar | 71% | 16.0 | 0.0 | → redirected |
| MakeGamesWithUs Academyeducation | similar | 71% | 16.0 | 0.0 | → redirected |
| Swift Sandboxeducation | similar | 71% | 0.0 | 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.