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
real
16 probes · Jun 16, 2026 → Aug 19, 2026aliveredirecteddeadunverified
Signal telemetry
4 families · 2 observed · observed only
Liveness probereal
alive in 0% of 16 probesavg response 2463 ms
Developer tractionchecked · none
No public repository linked — GitHub signals are not tracked for this product.
Press & sentimentchecked · none
No coverage found in the tracked press corpus. Absence of press is itself a signal at this stage.
Web footprintreal
resolved host library.ioedge direct originserver not reportedTranco rank #361,110
Domain age & certificate data not yet collected
Analyst read
generated from the observed metrics above · no external narrative
circuits.io's listed URL redirected off its original domain (to https://library.io/) when we last probed it on Aug 19, 2026 — we mark it redirected, not dead. Its Pulse Index is 21.4 of 100, built from 2 of 4 observed signal families. Observed footprint: 10 functional tags. It has no curated competitive-alternative edges yet, so the comparable set below is functional tag-similarity — read it with the confidence flags.
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 modelfreemium
Liveness tierunknown
Competitive alternativesnone linked
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
2026-08-19 14:58Z
200
123d.circuits.io → library.io
—
3124
redirected_offsite
2026-08-11 14:10Z
200
123d.circuits.io → library.io
—
2911
redirected_offsite
2026-08-08 23:50Z
200
123d.circuits.io → library.io
—
4096
redirected_offsite
2026-08-05 19:43Z
200
123d.circuits.io → library.io
—
3197
redirected_offsite
2026-07-30 18:59Z
200
123d.circuits.io → library.io
—
2634
redirected_offsite
2026-07-26 15:40Z
200
123d.circuits.io → library.io
—
2238
redirected_offsite
2026-07-18 12:25Z
200
123d.circuits.io → library.io
—
3071
redirected_offsite
2026-07-12 09:41Z
200
123d.circuits.io → library.io
—
3817
redirected_offsite
2026-07-04 13:43Z
200
123d.circuits.io → library.io
—
1629
redirected_offsite
2026-06-23 14:54Z
200
123d.circuits.io → library.io
—
1789
redirected_offsite
2026-06-21 17:58Z
200
123d.circuits.io → library.io
—
315
redirected_offsite
2026-06-21 17:58Z
200
123d.circuits.io → library.io
—
2155
redirected_offsite
2026-06-20 07:23Z
200
123d.circuits.io → library.io
—
1815
redirected_offsite
2026-06-19 05:49Z
200
123d.circuits.io → library.io
—
1695
redirected_offsite
Full redirect chains, response headers, and DNS records are not captured by the current probe.
Launch Sentinel tear sheet · circuits.io · as of 2026-08-28 · launchsentinel.com/reports/circuits-io · liveness, pulse and press figures are observed data with provenance shown per panel.