The recorded URL now redirects offsite — often an acquisition, rebrand, or wind-down; the destination is recorded in the telemetry below. Pulse momentum is negative over 30 days (-1.1) — observed activity is receding.
HTTP liveness
real
34 probes · Jun 16, 2026 → Aug 27, 2026aliveredirecteddeadunverified
Signal telemetry
4 families · 3 observed · observed only
Liveness probereal
alive in 0% of 34 probesavg response 1565 ms
Developer tractionchecked · none
No public repository linked — GitHub signals are not tracked for this product.
Press & sentimentreal
“Apple is using AI to fix Safari’s extension problem”
The Verge · Jun 8 · importance 4/5 · 1 tracked mention
Web footprintreal
resolved host oreilly.comedge direct originserver ApacheTranco rank #86,162
Domain age & certificate data not yet collected
Analyst read
generated from the observed metrics above · no external narrative
Safari's listed URL redirected off its original domain (to https://www.oreilly.com/) when we last probed it on Aug 27, 2026 — we mark it redirected, not dead. Its Pulse Index is 24.2 of 100, built from 3 of 4 observed signal families. Observed footprint: 1 tracked press mention, 4 functional tags. It sits on the competitive-alternatives graph with 1 linked rival, so the comparable set below leans on curated edges.
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 attributes
Business modelsubscription
Liveness tieractive
Competitive alternatives1
Open sourceNo
Public APINo
Free tierNo
Enterprise tierNo
Funding & team
not in source
No 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.
RAW TELEMETRY last 14 probes▾
PROBED
HTTP
ORIGIN → RESOLVED
SERVER
MS
VERDICT
2026-08-27 18:07Z
200
safaribooksonline.com → oreilly.com
Apache
1388
redirected_offsite
2026-08-26 09:38Z
200
safaribooksonline.com → oreilly.com
Apache
1577
redirected_offsite
2026-08-19 14:00Z
200
safaribooksonline.com → oreilly.com
Apache
1499
redirected_offsite
2026-08-11 00:35Z
200
safaribooksonline.com → oreilly.com
Apache
1095
redirected_offsite
2026-08-08 06:28Z
200
safaribooksonline.com → oreilly.com
Apache
2466
redirected_offsite
2026-08-05 18:48Z
200
safaribooksonline.com → oreilly.com
Apache
2011
redirected_offsite
2026-07-30 18:02Z
200
safaribooksonline.com → oreilly.com
Apache
1373
redirected_offsite
2026-07-23 09:22Z
200
safaribooksonline.com → oreilly.com
Apache
1633
redirected_offsite
2026-07-22 09:26Z
200
safaribooksonline.com → oreilly.com
Apache
1254
redirected_offsite
2026-07-21 09:26Z
200
safaribooksonline.com → oreilly.com
Apache
1799
redirected_offsite
2026-07-20 09:54Z
200
safaribooksonline.com → oreilly.com
Apache
2186
redirected_offsite
2026-07-19 09:05Z
200
safaribooksonline.com → oreilly.com
Apache
1385
redirected_offsite
2026-07-18 08:46Z
200
safaribooksonline.com → oreilly.com
Apache
770
redirected_offsite
2026-07-17 09:07Z
200
safaribooksonline.com → oreilly.com
Apache
1469
redirected_offsite
Full redirect chains, response headers, and DNS records are not captured by the current probe.
Launch Sentinel tear sheet · Safari · as of 2026-08-28 · launchsentinel.com/reports/safari · liveness, pulse and press figures are observed data with provenance shown per panel.