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Site Information

castlighthealth.com

Link authority for castlighthealth.com (registrable domain: castlighthealth.com) from the Common Crawl web graph: PageRank and harmonic centrality history since 2017, current scores, and the site's top backlink sources.

22Domain PageRank
20Host Backlinks
304Domain Backlinks
Link authority data (PageRank, harmonic centrality) and backlinks come from the Common Crawl web graph.
castlighthealth_com.profile
Current Scores

Web-graph authority (0-100)

Domain scores measure castlighthealth.com as a whole: every subdomain's links rolled up into one node of Common Crawl's domain-level web graph. Host scores measure the exact hostname castlighthealth.com. WWW scores cover the www variant of that hostname, which the graph tracks as its own entry since January 2026 (before that, www and bare host were merged). A big gap between domain and host usually means the domain's authority lives on other subdomains. PageRank is link-endorsement authority: how much weight the sites linking here carry themselves. Harmonic centrality measures reach: how close this site sits to the rest of the web when following links, which favors broadly connected sites over ones boosted by a few heavy linkers. All are normalized 0 to 100 within each crawl snapshot; a dash means that series does not exist for this site.

22
Domain PageRank
1
Host PageRank
-
WWW PageRank
96
Domain Harmonic Centrality
94
Host Harmonic Centrality
-
WWW Harmonic Centrality
Site Intelligence

Homepage

What castlighthealth.com presents on its own homepage: the page title, description, and the social share markup it publishes. Pulled from https://castlighthealth.com.

TitleCastlight Health | Smarter Benefits Navigation
DescriptionCastlight helps employers, health plans, and employees navigate healthcare benefits with ease.
OG TitleCastlight Health | Smarter Benefits Navigation
OG DescriptionCastlight helps employers, health plans, and employees navigate healthcare benefits with ease.
OG Site NameCastlight Health
Twitter Cardsummary_large_image
Site Intelligence

Social accounts and contact points

Where this site maintains a presence and every reachable route its homepage exposes: social accounts, contact pages, addresses, and content feeds.

Site Intelligence

Structured data (JSON-LD)

The schema.org markup this homepage publishes: the machine-readable identity search engines and AI systems read. Types found: WebPage, BreadcrumbList, WebSite, Organization.

JSON-LD block (2,038 bytes)
{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.castlighthealth.com\/","url":"https:\/\/www.castlighthealth.com\/","name":"Castlight Health | Smarter Benefits Navigation","isPartOf":{"@id":"https:\/\/www.castlighthealth.com\/#website"},"about":{"@id":"https:\/\/www.castlighthealth.com\/#organization"},"datePublished":"2025-08-14T04:09:50+00:00","dateModified":"2026-07-13T20:56:39+00:00","description":"Castlight helps employers, health plans, and employees navigate healthcare benefits with ease.","breadcrumb":{"@id":"https:\/\/www.castlighthealth.com\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.castlighthealth.com\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.castlighthealth.com\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home"}]},{"@type":"WebSite","@id":"https:\/\/www.castlighthealth.com\/#website","url":"https:\/\/www.castlighthealth.com\/","name":"Castlight Health","description":"Castlight Health","publisher":{"@id":"https:\/\/www.castlighthealth.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.castlighthealth.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.castlighthealth.com\/#organization","name":"Castlight Health","url":"https:\/\/www.castlighthealth.com\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.castlighthealth.com\/#\/schema\/logo\/image\/","url":"https:\/\/www.castlighthealth.com\/wp-content\/uploads\/2025\/08\/castlight-logo.svg","contentUrl":"https:\/\/www.castlighthealth.com\/wp-content\/uploads\/2025\/08\/castlight-logo.svg","caption":"Castlight Health"},"image":{"@id":"https:\/\/www.castlighthealth.com\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.linkedin.com\/company\/castlight-health"]}]}
Web-Graph History

Authority over time

Every Common Crawl web-graph release since 2017, roughly quarterly. The domain series goes back to 2017; Common Crawl only began publishing the host-level graph in 2020, so host lines start there. Click a legend entry to show or hide that line. Flat lines are normal for established sites; watch for sustained rises or drops, which track real gains or losses in who links here.

A note on www: through the end of 2025 the source web graph merged www and non-www hostnames into the bare name, so one host line covers both. Starting in January 2026 the graph splits them into separate entries, which is why www can carry its own scores going forward.

Backlink Data

Backlink counts

Unique linking domains seen in Common Crawl's link graphs. This is a different dataset than the 0-100 authority scores above: these are raw counts, host-level for castlighthealth.com and domain-level for castlighthealth.com with all its subdomains combined. Common Crawl covers a large sample of the web, not all of it, so treat counts as comparable between sites rather than absolute totals.

20
Host Backlinks
304
Domain Backlinks
Backlink Data

Top backlinks in the domain graph

Common Crawl publishes two link graphs. The DOMAIN graph connects whole domains: every link from any page of one domain to any page of another. This table shows the highest-authority domains linking to castlighthealth.com (including its subdomains), ranked by the linker's PageRank. The table shows the top 304; the download carries the full stored list (up to 10,000 linkers) as JSON. Click a linker for its own site profile.

Download domain backlinks (.json)

Linking SiteLinker PageRankLinker Harmonic Centrality
google.com10099
apple.com9253
amazonaws.com9049
blogspot.com8648
nih.gov8446
outlook.com8344
substack.com8145
atlassian.com8141
harvard.edu8045
prnewswire.com8044
berkeley.edu7844
pypi.org7743
globenewswire.com7740
webflow.io7639
vice.com7542
entrepreneur.com7540
c212.net7437
shrm.org7338
unc.edu7239
swoogo.com7237
govdelivery.com7236
pymnts.com7138
msu.edu7138
michigan.gov7137
honeywell.com7038
ky.gov7037
gwu.edu6936
impress.co.jp6837
jmir.org6836
healthworkscollective.com6739
lockheedmartin.com6737
scoop.it6736
hrdive.com6735
jpmorganchase.com6637
gusto.com6636
mercer.com6635
conference-board.org6635
kleinerperkins.com6629
romper.com6627
cjr.org6435
kffhealthnews.org6434
kcur.org6336
cfo.com6335
leafly.com6335
bvp.com6335
teamtreehouse.com6331
childrenshospital.org6235
elitedaily.com6235
reason.com6235
ere.net6134
uplers.com6134
healthcaredive.com6134
kpbs.org6034
venrock.com6025
good.is5935
theorg.com5934
tangocard.com5933
l3harris.com5926
coherentmarketinsights.com5926
peoplemanagingpeople.com5924
omniapartners.com5923
phillyvoice.com5835
vermontpublic.org5834
devopsdays.org5834
hitconsultant.net5825
manhattan.institute5824
saashub.com5735
gdit.com5734
renaissancecapital.com5723
kyschools.us5634
clickguard.com5633
talentculture.com5534
amwell.com5534
wyomingpublicmedia.org5534
mcgaw.io5533
rockhealth.com5526
leapfroggroup.org5524
springhealth.com5434
leadiq.com5434
foundersnetwork.com5433
worksinprogress.co5334
virtahealth.com5334
techsauce.co5325
healthcostinstitute.org5324
worth.com5324
mcleanco.com5323
abc57.com5234
thehealthcareblog.com5234
carolinajournal.com5234
kuer.org5226
wvpublic.org5226
beckerspayer.com5224
insurancethoughtleadership.com5223
yorokobu.es5134
ffwd.org5134
wjct.org5134
wrvo.org5134
ijpr.org5134
mtpr.org5126
hourdetroit.com5033
grokker.com5033
woub.org4934
tuftshealthplan.com4933
kgou.org4924
papaly.com4833
kveller.com4825
narconon.org4824
intpolicydigest.org4824
localsearchforum.com4823
healthpopuli.com4823
hnba.com4733
aspenpublicradio.org4733
darkdaily.com4725
theeap.com4723
pshra.org4722
prialto.com4722
highperformr.ai4634
women2.com4624
electronichealthreporter.com4624
cfothoughtleader.com4623
praecipio.com4622
ciobulletin.com4622
fcps.net4533
segurosunimed.com.br4533
worldcongress.com4524
histalk2.com4522
lanterncare.com4519
nabip.org4424
bcbsnd.com4422
kiowacountypress.net4325
catalyze.org4324
wbaa.org4324
beststartup.us4323
blumbergcapital.com4323
piedmontexedra.com4234
partnerbase.com4233
retecool.com4233
kaiahealth.com4223
recruiterslineup.com4222
oshihealth.com4221
francisway.com4221
healthactioncouncil.org4221
milliegiving.com4220
goempyrean.com4133
epistemix.com4133
applerubber.com4123
startupill.com4122
digitalhealthhub.org4120
liteonline.com4033
outofpocket.health4033
atozdatabases.com4023
canorml.org4023
nebgh.org4022
secondopinion.media4022
apreehealth.com3933
the-alliance.org3922
leadedge.com3921
hellomd.com3823
wordandbrown.com3823
recruitingnewsnetwork.com3823
mhm.org3822
leadtail.com3822
edcutah.org3822
scanews.com3733
papasearch.net3733
ncpathinktank.org3733
techjobsforgood.com3723
hempgazette.com3723
virtualassistantassistant.com3723
hrlineup.com3722
mbgh.org3721
referralmd.com3718
rutherfordschools.org3633
creativetalkconference.com3623
mg21.com3623
positivemed.com3622
counselhealth.com3620
bakertilly.es3522
iposcoop.com3521
paprevention.org3520
sourceonhealthcare.org3423
breakthru.me3422
aimseducation.edu3421
rannkly.com3419
biopharmaapac.com3324
ejfhc.org3321
drjohnm.org3222
fierceforblackwomen.com3222
thehospitalhandbook.com3222
verawholehealth.com3221
hospitalogy.com3221
wahealthalliance.org3221
ssoeasy.com3219
distillintelligence.com3218
racetovalue.org3123
telegram.ee3123
montclare.com3122
histalkpractice.com3122
calibreone.com3121
paulkeckley.com3022
drevidence.com3021
fabnet.org3021
pastop.org3020
ermersuter.com3018
newcastlewa.gov2923
htdhealth.com2921
4sighthealth.com2921
thestacc.com2918
porti.ru2823
healthtechnerds.com2721
translationexchange.com2622
myenroll.com2622
project-pulse.eu2622
health2news.com2622
mosaichealth.com2620
tritonhr.com2521
metropolitandigital.com2521
ncbch.net2520
waltgrayson.me2322
jackuldrich.com2322
lightspeedmarketing.com2321
womenadvancenc.org2320
directorysiteslist.com2222
leadnear.com2222
hicounselor.com2220
benefitsforeveryworld.com2218
vnhealthclinic.org2217
business20channel.tv2121
affordablecarenc.com2118
donaldlandwirth.com2111
mbamedical.com2022
newsforpublic.com2021
northwindhealth.com2018
los-angeles-marijuana-lawyer.com2013
covid-inequities.info1921
healthtechnologyinsights.com1921
healthdesigns.net1920
gpbch.org1919
worldbusinesspromote.com1918
maineallcare.org1823
screensafeinc.com1817
edmonson.k12.ky.us1723
beerepurves.com1720
dltech.forum1718
growthevidence.com1622
echoloc.ai1617
beardesign.me1522
bcgbenefits.com1517
pacolet.org1418
manualusa.com1418
sbookscan.com1323
healthtechstack.io1321
robuta.com1318
nephilamarketing.com1318
ballard.k12.ky.us1317
riskmanagers.us1222
chunginstitute.com1222
advertisecolumbus.com1218
treehouserecoverync.com1217
healthpolicyforum.org1122
lvntorn.net1122
nodtonothing.com1122
covidbestpractices.com1119
ieshaffer.com1117
bcbsnd.me1113
ravikanep.ee1023
esoftreviews.com1020
corpstrat.com1019
loginslink.com1018
pipsrewards.org1013
northerncaliforniadirectory.com922
backlinks.sbs918
blackliszt.com822
northvillecounselingcenter.net821
centralert.com818
castlightindia.com817
dreamhire.io817
awesomefintech.com813
houstonhealthcareinitiative.org717
ilivelifewell.com711
videographica.com711
qltura.org618
thehrfieldguide.com617
lisaforsanmateo.com617
tuduyinvest.com614
peopleadvocatingtransition.com613
nasdaqchart.com517
lawrenceleisure.com517
saasft.com516
lowerandwider.com513
justtalking7.info50
pilatesand.com413
handballacademy.org413
constitute.net318
infoglobalarg.com317
somnas.com38
akihbs.com29
fyicombinator.com112
shirateblog.com16
brimdistributors.com15
workfromoffice.com00
healthmessages.org00
bluecareadvisormn.com00
marytolan.net00
Backlink Data

Top backlinks in the host graph

The HOST graph connects exact hostnames, so subdomains count separately. This table shows the highest-authority hosts linking to castlighthealth.com specifically, ranked by the linker's PageRank. The table shows the top 20; the download carries the full stored list (up to 10,000 linkers) as JSON. Click a linker for its own site profile.

Download host backlinks (.json)