Newsletter platform with paid subscriptions.
Substack is the 9th most popular marketing ESP we track.
Detected by 203 distinct extension users.
Distribution of brands using Substack by industry. Helps you gauge whether this ESP is popular with businesses similar to yours. Brands tagged in two industries are counted in both.
Based on 239 of 348 brands tagged (69% coverage). Industries assigned automatically using AI; not every brand is tagged yet.
Where this ESP's emails land in Gmail. Each brand counted once (average of per-brand percentages) so a single high-volume sender can't dominate. Spam placement is mostly driven by the sender (list quality, content, complaint rate). This number reflects both the ESP's infrastructure AND the kind of senders who choose it — not just deliverability quality.
By volume: inbox 2,231 · promotions 120 · spam 7 (2,358 emails observed)
Percentages are averaged per brand (each counted once) across 87 brands using Substack with at least 5 placement observations each.
Underlying transactional infrastructure Substack routes through, detected from the sender hostname (PTR record) on each email's Received header. Bigger sample → more accurate.
344 as their primary ESP, the rest send transactional or secondary email through it. Primary users are listed first, then secondary.
| Brand | Role | Obs | Spam | Last seen |
|---|---|---|---|---|
|
Substack
substack.com
|
primary | 44 | 0.0% | 2026-06-30 |
|
1800dtc
1800dtc.substack.com
|
primary | 14 | 0.0% | 2026-06-30 |
|
Aakashgupta
aakashgupta.substack.com
|
primary | 1 | — | 2026-05-19 |
|
Aaronparnas
aaronparnas.substack.com
|
primary | 2 | — | 2026-06-09 |
|
Abhiyadav
abhiyadav.substack.com
|
primary | 4 | 0.0% | 2026-06-14 |
|
Accessfuel
accessfuel.substack.com
|
primary | 2 | — | 2026-06-04 |
|
Accionables
accionables.substack.com
|
primary | 4 | 0.0% | 2026-06-11 |
|
Adcatalyst
adcatalyst.substack.com
|
primary | 1 | — | 2026-05-19 |
|
Admiredleadership
admiredleadership.substack.com
|
primary | 20 | 0.0% | 2026-06-30 |
|
Afterschool
afterschool.substack.com
|
primary | 6 | 0.0% | 2026-06-29 |
|
Aireadycmo
aireadycmo.substack.com
|
primary | 4 | 0.0% | 2026-06-30 |
|
Airepo
airepo.substack.com
|
primary | 3 | 0.0% | 2026-06-05 |
|
Aiuncovering
aiuncovering.substack.com
|
primary | 1 | — | 2026-06-05 |
|
Alexmhsmith
alexmhsmith.substack.com
|
primary | 17 | 0.0% | 2026-06-24 |
|
Algotradealert
algotradealert.substack.com
|
primary | 19 | 0.0% | 2026-06-18 |
|
Almosttimely
almosttimely.substack.com
|
primary | 6 | 0.0% | 2026-06-07 |
|
Altsummit
altsummit.substack.com
|
primary | 1 | — | 2026-06-26 |
|
Anntelnaes
anntelnaes.substack.com
|
primary | 2 | — | 2026-05-28 |
|
Appeconomyinsights
appeconomyinsights.substack.com
|
primary | 2 | — | 2026-06-16 |
|
Aprildunford
aprildunford.substack.com
|
primary | 1 | — | 2026-06-23 |
|
Arbitrageandy
arbitrageandy.substack.com
|
primary | 4 | 0.0% | 2026-06-23 |
|
Arkticfox
arkticfox.substack.com
|
primary | 1 | — | 2026-06-03 |
|
Askachiefofstaff
askachiefofstaff.substack.com
|
primary | 4 | 0.0% | 2026-06-23 |
|
Austinkleon
austinkleon.substack.com
|
primary | 2 | — | 2026-06-02 |
|
Automatter
automatter.substack.com
|
primary | 1 | — | 2026-06-08 |
|
Barbarabramo
barbarabramo.substack.com
|
primary | 16 | 0.0% | 2026-06-28 |
|
Bcreator
bcreator.substack.com
|
primary | 1 | — | 2026-06-17 |
|
Beausociety
beausociety.substack.com
|
primary | 2 | — | 2026-06-26 |
|
Bensbites
bensbites.substack.com
|
primary | 5 | 0.0% | 2026-06-30 |
|
Berkeleyrdi
berkeleyrdi.substack.com
|
primary | 1 | — | 2026-05-27 |
|
Betteryounotes
betteryounotes.substack.com
|
primary | 1 | — | 2026-06-21 |
|
Bigthinkmedia
bigthinkmedia.substack.com
|
primary | 11 | 0.0% | 2026-06-17 |
|
Bitecode
bitecode.substack.com
|
primary | 1 | — | 2026-06-21 |
|
Bostonmartialartscenter
bostonmartialartscenter.substack.com
|
primary | 1 | — | 2026-06-09 |
|
Botharetrue
botharetrue.substack.com
|
primary | 1 | — | 2026-06-25 |
|
Brandtribe
brandtribe.substack.com
|
primary | 13 | 0.0% | 2026-06-30 |
|
Brianmaierhofer
brianmaierhofer.substack.com
|
primary | 1 | — | 2026-05-17 |
|
Briantylercohen
briantylercohen.substack.com
|
primary | 1 | — | 2026-06-14 |
|
Buildwithaiclub418
buildwithaiclub418.substack.com
|
primary | 1 | — | 2026-06-08 |
|
Burk
burk.substack.com
|
primary | 1 | — | 2026-05-19 |
|
Burnedhaystack
burnedhaystack.substack.com
|
primary | 4 | 0.0% | 2026-06-20 |
|
Bytebytego
bytebytego.substack.com
|
primary | 12 | 0.0% | 2026-06-27 |
|
Cafecondigital
cafecondigital.substack.com
|
primary | 4 | 0.0% | 2026-06-29 |
|
Cannonballgtm
cannonballgtm.substack.com
|
primary | 5 | 0.0% | 2026-06-24 |
|
Cantadorafieldnotes
cantadorafieldnotes.substack.com
|
primary | 2 | — | 2026-06-01 |
|
Careerhappiness
careerhappiness.substack.com
|
primary | 12 | 0.0% | 2026-06-04 |
|
Carvalhando
carvalhando.substack.com
|
primary | 1 | — | 2026-06-02 |
|
Cashflowdiary
cashflowdiary.substack.com
|
primary | 26 | 0.0% | 2026-06-28 |
|
Chantellemorrison
chantellemorrison.substack.com
|
primary | 1 | — | 2026-06-05 |
|
Charliehills
charliehills.substack.com
|
primary | 2 | — | 2026-06-21 |
|
Chrisgeidner
chrisgeidner.substack.com
|
primary | 1 | — | 2026-06-17 |
|
Chuckescapes
chuckescapes.substack.com
|
primary | 2 | — | 2026-05-29 |
|
Citationsplease
citationsplease.substack.com
|
primary | 1 | — | 2026-06-05 |
|
Claudedesktop
claudedesktop.substack.com
|
primary | 2 | — | 2026-06-01 |
|
Claudenotebook
claudenotebook.substack.com
|
primary | 1 | — | 2026-06-06 |
|
Cloudedjudgement
cloudedjudgement.substack.com
|
primary | 4 | 0.0% | 2026-06-26 |
|
Comocomiclub
comocomiclub.substack.com
|
primary | 2 | — | 2026-05-21 |
|
Contentevc
contentevc.substack.com
|
primary | 4 | 0.0% | 2026-06-16 |
|
Coreyhinde
coreyhinde.substack.com
|
primary | 1 | — | 2026-06-23 |
|
Cosasdefreelance
cosasdefreelance.substack.com
|
primary | 4 | 0.0% | 2026-06-18 |
|
Crookedmedia
crookedmedia.substack.com
|
primary | 9 | 0.0% | 2026-06-22 |
|
Dailyheadlines
dailyheadlines.substack.com
|
primary | 20 | 0.0% | 2026-06-29 |
|
Danabramov
danabramov.substack.com
|
primary | 3 | 0.0% | 2026-06-19 |
|
Danaherra
danaherra.substack.com
|
primary | 1 | — | 2026-05-19 |
|
Danielcasal
danielcasal.substack.com
|
primary | 1 | — | 2026-05-25 |
|
Darkopavic
darkopavic.substack.com
|
primary | 1 | — | 2026-06-24 |
|
Darrellalfonso
darrellalfonso.substack.com
|
primary | 10 | 0.0% | 2026-06-26 |
|
Daveshap
daveshap.substack.com
|
primary | 1 | — | 2026-05-26 |
|
Davidfastuca
davidfastuca.substack.com
|
primary | 4 | 0.0% | 2026-06-17 |
|
Davidlebovitz
davidlebovitz.substack.com
|
primary | 1 | — | 2026-06-13 |
|
Dawestheband
dawestheband.substack.com
|
primary | 5 | 0.0% | 2026-06-25 |
|
Demesio
demesio.substack.com
|
primary | 1 | — | 2026-05-27 |
|
Diannealter
diannealter.substack.com
|
primary | 1 | — | 2026-06-12 |
|
Digitaldeepakblog
digitaldeepakblog.substack.com
|
primary | 3 | 0.0% | 2026-06-08 |
|
Dowhatworks
dowhatworks.substack.com
|
primary | 4 | 0.0% | 2026-06-26 |
|
Elenaverna
elenaverna.substack.com
|
primary | 11 | 0.0% | 2026-06-25 |
|
Elfbeauty
elfbeauty.substack.com
|
primary | 2 | — | 2026-06-30 |
|
Embedded
embedded.substack.com
|
primary | 1 | — | 2026-06-17 |
|
Engineerofdata
engineerofdata.substack.com
|
primary | 2 | — | 2026-06-16 |
|
Enzocolucci
enzocolucci.substack.com
|
primary | 1 | — | 2026-06-01 |
|
Esgfitness
esgfitness.substack.com
|
primary | 4 | 0.0% | 2026-06-18 |
|
Estoicismomaestro
estoicismomaestro.substack.com
|
primary | 3 | 0.0% | 2026-06-08 |
|
Eveliosilvera
eveliosilvera.substack.com
|
primary | 2 | — | 2026-06-08 |
|
Excellentprompts
excellentprompts.substack.com
|
primary | 1 | — | 2026-06-01 |
|
Failagain
failagain.substack.com
|
primary | 1 | — | 2026-06-03 |
|
Faroljornalismo
faroljornalismo.substack.com
|
primary | 8 | 0.0% | 2026-06-26 |
|
Figsinwintertime
figsinwintertime.substack.com
|
primary | 17 | 0.0% | 2026-06-30 |
|
Filtercoffee
filtercoffee.substack.com
|
primary | 2 | — | 2026-05-20 |
|
Floatvibes
floatvibes.substack.com
|
primary | 3 | 0.0% | 2026-06-10 |
|
Floriangrummes
floriangrummes.substack.com
|
primary | 2 | — | 2026-06-29 |
|
Foreignkey
foreignkey.substack.com
|
primary | 4 | 0.0% | 2026-06-18 |
|
Freelancejobsnetwork
freelancejobsnetwork.substack.com
|
primary | 24 | 0.0% | 2026-06-23 |
|
Freelancejobsuk
freelancejobsuk.substack.com
|
primary | 23 | 0.0% | 2026-06-26 |
|
Freyaindia
freyaindia.substack.com
|
primary | 1 | — | 2026-05-28 |
|
Fromthefrontlines
fromthefrontlines.substack.com
|
primary | 4 | 0.0% | 2026-06-25 |
|
Fromvanessasdesk
fromvanessasdesk.substack.com
|
primary | 4 | 0.0% | 2026-06-14 |
|
Galiza
galiza.substack.com
|
primary | 1 | — | 2026-06-16 |
|
Garymarcus
garymarcus.substack.com
|
primary | 1 | — | 2026-05-22 |
|
Georgesaunders
georgesaunders.substack.com
|
primary | 2 | — | 2026-05-20 |
|
Gigglysquad
gigglysquad.substack.com
|
primary | 1 | — | 2026-06-17 |
|
Giovannaventola
giovannaventola.substack.com
|
primary | 3 | 0.0% | 2026-06-23 |
|
Glasp
glasp.substack.com
|
primary | 1 | — | 2026-05-19 |
|
Gobbledy
gobbledy.substack.com
|
primary | 5 | 0.0% | 2026-06-24 |
|
Goodmovie
goodmovie.substack.com
|
primary | 2 | — | 2026-06-01 |
|
Gregorojstersek
gregorojstersek.substack.com
|
primary | 6 | 0.0% | 2026-06-29 |
|
Grexanddirtyskittles
grexanddirtyskittles.substack.com
|
primary | 2 | — | 2026-05-27 |
|
Growthmemo
growthmemo.substack.com
|
primary | 1 | — | 2026-06-01 |
|
Growthstory1
growthstory1.substack.com
|
primary | 1 | — | 2026-06-04 |
|
Growthwaveshq
growthwaveshq.substack.com
|
primary | 5 | 0.0% | 2026-06-23 |
|
Gtmaiacademy
gtmaiacademy.substack.com
|
primary | 1 | — | 2026-06-23 |
|
Gtmedownload
gtmedownload.substack.com
|
primary | 5 | 0.0% | 2026-06-28 |
|
Gtmengineerschool
gtmengineerschool.substack.com
|
primary | 5 | 0.0% | 2026-06-03 |
|
Gtmonday
gtmonday.substack.com
|
primary | 1 | — | 2026-06-23 |
|
Gtmontheedge
gtmontheedge.substack.com
|
primary | 5 | 0.0% | 2026-06-08 |
|
Gtmstrategist
gtmstrategist.substack.com
|
primary | 1 | — | 2026-06-23 |
|
Heathercoxrichardson
heathercoxrichardson.substack.com
|
primary | 4 | 0.0% | 2026-05-30 |
|
Heyallstories
heyallstories.substack.com
|
primary | 2 | — | 2026-06-04 |
|
Heycreator
heycreator.substack.com
|
primary | 1 | — | 2026-05-21 |
|
Hisglory
hisglory.substack.com
|
primary | 4 | 0.0% | 2026-06-22 |
|
Houseofgreen
houseofgreen.substack.com
|
primary | 1 | — | 2026-06-08 |
|
Hugobentz
hugobentz.substack.com
|
primary | 5 | 0.0% | 2026-06-19 |
|
Hugonicole
hugonicole.substack.com
|
primary | 4 | 0.0% | 2026-05-28 |
|
Hugopochet
hugopochet.substack.com
|
primary | 2 | — | 2026-06-21 |
|
Hunterharris
hunterharris.substack.com
|
primary | 1 | — | 2026-06-16 |
|
Iiculture
iiculture.substack.com
|
primary | 6 | 0.0% | 2026-06-01 |
|
Ilanaglazer
ilanaglazer.substack.com
|
primary | 1 | — | 2026-06-22 |
|
Inboxmechanics
inboxmechanics.substack.com
|
primary | 1 | — | 2026-05-20 |
|
Indiebusinessclub
indiebusinessclub.substack.com
|
primary | 1 | — | 2026-06-02 |
|
Ingoodco
ingoodco.substack.com
|
primary | 4 | 0.0% | 2026-06-11 |
|
Inn8ly
inn8ly.substack.com
|
primary | 2 | — | 2026-06-01 |
|
Introvertsintro
introvertsintro.substack.com
|
primary | 6 | 0.0% | 2026-05-28 |
|
Inviertejoven
inviertejoven.substack.com
|
primary | 1 | — | 2026-06-11 |
|
Jahelexplores
jahelexplores.substack.com
|
primary | 1 | — | 2026-05-22 |
|
Japanwebmagazine
japanwebmagazine.substack.com
|
primary | 5 | 0.0% | 2026-06-15 |
|
Jeanelalvarado
jeanelalvarado.substack.com
|
primary | 1 | — | 2026-05-26 |
|
Jenbaxter
jenbaxter.substack.com
|
primary | 1 | — | 2026-06-17 |
|
Jessramosdata
jessramosdata.substack.com
|
primary | 1 | — | 2026-06-23 |
|
Jiribigas
jiribigas.substack.com
|
primary | 4 | 0.0% | 2026-06-06 |
|
Johannarenoth
johannarenoth.substack.com
|
primary | 1 | — | 2026-05-22 |
|
Jon4growth
jon4growth.substack.com
|
primary | 3 | 0.0% | 2026-06-23 |
|
Jonascastromp4
jonascastromp4.substack.com
|
primary | 3 | — | 2026-06-23 |
|
Jonathanshedler
jonathanshedler.substack.com
|
primary | 11 | 0.0% | 2026-06-29 |
|
Joshuacitarella
joshuacitarella.substack.com
|
primary | 2 | — | 2026-06-03 |
|
Juliettripp
juliettripp.substack.com
|
primary | 7 | 0.0% | 2026-06-16 |
|
Justinwelsh
justinwelsh.substack.com
|
primary | 4 | 0.0% | 2026-06-20 |
|
Jvweb
jvweb.substack.com
|
primary | 1 | — | 2026-05-26 |
|
Kakashiii111
kakashiii111.substack.com
|
primary | 2 | — | 2026-06-21 |
|
Kareem
kareem.substack.com
|
primary | 2 | — | 2026-06-26 |
|
Katelynbeaty
katelynbeaty.substack.com
|
primary | 1 | — | 2026-05-20 |
|
Katierickson
katierickson.substack.com
|
primary | 1 | — | 2026-06-16 |
|
Kaydeewrites
kaydeewrites.substack.com
|
primary | 1 | — | 2026-06-20 |
|
Kenhuangus
kenhuangus.substack.com
|
primary | 4 | 0.0% | 2026-06-23 |
|
Kevinlbrown
kevinlbrown.substack.com
|
primary | 1 | — | 2026-05-29 |
|
Krispai
krispai.substack.com
|
primary | 6 | 0.0% | 2026-06-08 |
|
Leadershipinseo
leadershipinseo.substack.com
|
primary | 1 | — | 2026-06-26 |
|
Leahtharin
leahtharin.substack.com
|
primary | 1 | — | 2026-06-28 |
|
Lenny
lenny.substack.com
|
primary | 59 | 0.0% | 2026-06-30 |
|
Lex
lex.substack.com
|
primary | 1 | — | 2026-06-16 |
|
Liahaberman
liahaberman.substack.com
|
primary | 4 | 0.0% | 2026-06-02 |
|
Liamaustin
liamaustin.substack.com
|
primary | 7 | 0.0% | 2026-06-30 |
|
Lilyraynyc
lilyraynyc.substack.com
|
primary | 6 | 0.0% | 2026-06-17 |
|
Linas
linas.substack.com
|
primary | 2 | — | 2026-06-10 |
|
Lindsayrosenthal
lindsayrosenthal.substack.com
|
primary | 4 | 0.0% | 2026-06-16 |
|
Linkedintutorial
linkedintutorial.substack.com
|
primary | 2 | — | 2026-06-25 |
|
Linkingandgrowing
linkingandgrowing.substack.com
|
primary | 5 | 0.0% | 2026-06-27 |
|
Livetok
livetok.substack.com
|
primary | 2 | — | 2026-06-15 |
|
Lizontheweb
lizontheweb.substack.com
|
primary | 8 | 0.0% | 2026-06-24 |
|
Luckylogits
luckylogits.substack.com
|
primary | 1 | — | 2026-06-08 |
|
Luizasnewsletter
luizasnewsletter.substack.com
|
primary | 8 | 0.0% | 2026-06-26 |
|
Lukeheilbuth
lukeheilbuth.substack.com
|
primary | 1 | — | 2026-06-10 |
|
Lunchtimepandemic
lunchtimepandemic.substack.com
|
primary | 3 | 0.0% | 2026-06-02 |
|
Marcsirkin
marcsirkin.substack.com
|
primary | 1 | — | 2026-06-25 |
|
Margemnewsletter
margemnewsletter.substack.com
|
primary | 3 | 0.0% | 2026-06-24 |
|
Mariegd
mariegd.substack.com
|
primary | 1 | — | 2026-06-23 |
|
Marketingideas
marketingideas.substack.com
|
primary | 11 | 0.0% | 2026-06-25 |
|
Markstouse
markstouse.substack.com
|
primary | 4 | 0.0% | 2026-06-19 |
|
Mastersofbabel
mastersofbabel.substack.com
|
primary | 1 | — | 2026-05-27 |
|
Matterreader
matterreader.substack.com
|
primary | 1 | — | 2026-06-21 |
|
Mattstoller
mattstoller.substack.com
|
primary | 11 | 0.0% | 2026-06-16 |
|
Metatrends
metatrends.substack.com
|
primary | 6 | 0.0% | 2026-06-14 |
|
Metehanai
metehanai.substack.com
|
primary | 1 | — | 2026-06-23 |
|
Metz
metz.substack.com
|
primary | 12 | 0.0% | 2026-06-28 |
|
Mg1
mg1.substack.com
|
primary | 1 | — | 2026-05-24 |
|
Minimalisthustlerdaily
minimalisthustlerdaily.substack.com
|
primary | 2 | — | 2026-06-05 |
|
Miniphilosophy
miniphilosophy.substack.com
|
primary | 4 | 0.0% | 2026-06-24 |
|
Mintinvestimentos
mintinvestimentos.substack.com
|
primary | 2 | — | 2026-06-17 |
|
Mistakeshappen
mistakeshappen.substack.com
|
primary | 1 | — | 2026-06-23 |
|
Mkt1
mkt1.substack.com
|
primary | 7 | 0.0% | 2026-06-26 |
|
Mktcontext
mktcontext.substack.com
|
primary | 1 | — | 2026-05-26 |
|
Mollyg
mollyg.substack.com
|
primary | 2 | — | 2026-06-23 |
|
Mollywizenberg
mollywizenberg.substack.com
|
primary | 1 | — | 2026-06-12 |
|
Mplbuild
mplbuild.substack.com
|
primary | 3 | 0.0% | 2026-06-23 |
|
Natesnewsletter
natesnewsletter.substack.com
|
primary | 1 | — | 2026-06-17 |
|
Necterine
necterine.substack.com
|
primary | 2 | — | 2026-05-28 |
|
Newcomer
newcomer.substack.com
|
primary | 2 | — | 2026-05-22 |
|
Neweconomies
neweconomies.substack.com
|
primary | 1 | — | 2026-05-29 |
|
Newsnotnoisejessicayellin
newsnotnoisejessicayellin.substack.com
|
primary | 2 | — | 2026-06-04 |
|
Newsseo
newsseo.substack.com
|
primary | 1 | — | 2026-06-10 |
|
Nextplayso
nextplayso.substack.com
|
primary | 12 | 0.0% | 2026-06-29 |
|
Nigelfarage
nigelfarage.substack.com
|
primary | 4 | 0.0% | 2026-06-23 |
|
Nodesk
nodesk.substack.com
|
primary | 4 | 0.0% | 2026-06-25 |
|
Nodonorteastrologia
nodonorteastrologia.substack.com
|
primary | 1 | — | 2026-06-28 |
|
Nonprofitleader
nonprofitleader.substack.com
|
primary | 1 | — | 2026-05-21 |
|
Nontoxictravelmadesimple
nontoxictravelmadesimple.substack.com
|
primary | 2 | — | 2026-06-30 |
|
Nssmagazine
nssmagazine.substack.com
|
primary | 2 | — | 2026-06-27 |
|
Nucleopsi
nucleopsi.substack.com
|
primary | 3 | 0.0% | 2026-06-28 |
|
On
on.substack.com
|
primary | 17 | 0.0% | 2026-06-18 |
|
Oneusefulthing
oneusefulthing.substack.com
|
primary | 3 | 0.0% | 2026-06-30 |
|
Onthehouse
onthehouse.substack.com
|
primary | 5 | 0.0% | 2026-06-23 |
|
Ossoff
ossoff.substack.com
|
primary | 1 | — | 2026-05-20 |
|
Otherfeminisms
otherfeminisms.substack.com
|
primary | 1 | — | 2026-05-21 |
|
Otrjutud
otrjutud.substack.com
|
primary | 7 | 0.0% | 2026-06-22 |
|
Ottessathisottessathat
ottessathisottessathat.substack.com
|
primary | 1 | — | 2026-05-26 |
|
Outboundkitchen
outboundkitchen.substack.com
|
primary | 8 | 0.0% | 2026-06-28 |
|
Pascalbornet
pascalbornet.substack.com
|
primary | 4 | 0.0% | 2026-06-19 |
|
Petershankmanofficial
petershankmanofficial.substack.com
|
primary | 2 | — | 2026-06-08 |
|
Peteryang
peteryang.substack.com
|
primary | 2 | — | 2026-06-28 |
|
Pierreherubel
pierreherubel.substack.com
|
primary | 3 | 0.0% | 2026-06-04 |
|
Pitchster
pitchster.substack.com
|
primary | 6 | 0.0% | 2026-06-01 |
|
Plungetowels
plungetowels.substack.com
|
primary | 1 | — | 2026-06-12 |
|
Pomp
pomp.substack.com
|
primary | 1 | — | 2026-06-15 |
|
Post
post.substack.com
|
primary | 17 | 0.0% | 2026-06-27 |
|
Pragmaticengineer
pragmaticengineer.substack.com
|
primary | 5 | 0.0% | 2026-06-24 |
|
Productforengineers
productforengineers.substack.com
|
primary | 1 | — | 2026-06-17 |
|
Productledseo
productledseo.substack.com
|
primary | 14 | 0.0% | 2026-06-25 |
|
Profgmedia
profgmedia.substack.com
|
primary | 33 | 0.0% | 2026-06-26 |
|
Profitsinsights
profitsinsights.substack.com
|
primary | 2 | — | 2026-06-01 |
|
Prompspravoce
prompspravoce.substack.com
|
primary | 4 | 0.0% | 2026-06-16 |
|
Quietcourage
quietcourage.substack.com
|
primary | 11 | 0.0% | 2026-06-07 |
|
Rarebeauty
rarebeauty.substack.com
|
primary | 1 | — | 2026-06-23 |
|
Rationaloptimistsociety
rationaloptimistsociety.substack.com
|
primary | 7 | 0.0% | 2026-06-28 |
|
Raygunnews
raygunnews.substack.com
|
primary | 3 | 0.0% | 2026-06-22 |
|
Redhotcopy
redhotcopy.substack.com
|
primary | 1 | — | 2026-06-02 |
|
Retailwomenintech
retailwomenintech.substack.com
|
primary | 4 | 0.0% | 2026-05-31 |
|
Revtechinsider
revtechinsider.substack.com
|
primary | 4 | 0.0% | 2026-06-19 |
|
Richardhaass
richardhaass.substack.com
|
primary | 4 | 0.0% | 2026-06-18 |
|
Rishikesh
rishikesh.substack.com
|
primary | 1 | — | 2026-05-20 |
|
Rocanews
rocanews.substack.com
|
primary | 7 | 0.0% | 2026-06-26 |
|
Ruben
ruben.substack.com
|
primary | 23 | 0.0% | 2026-06-24 |
|
Saasintelligence
saasintelligence.substack.com
|
primary | 8 | 0.0% | 2026-06-29 |
|
Sabahudinmurtic
sabahudinmurtic.substack.com
|
primary | 12 | 0.0% | 2026-06-25 |
|
Sabrinaramonov
sabrinaramonov.substack.com
|
primary | 3 | 0.0% | 2026-06-01 |
|
Sadiestlawrence
sadiestlawrence.substack.com
|
primary | 1 | — | 2026-06-06 |
|
Sageform
sageform.substack.com
|
primary | 11 | 0.0% | 2026-06-23 |
|
Saidthegemini
saidthegemini.substack.com
|
primary | 1 | — | 2026-05-18 |
|
Sarakuburic
sarakuburic.substack.com
|
primary | 1 | — | 2026-06-29 |
|
Sashachapin
sashachapin.substack.com
|
primary | 2 | — | 2026-06-23 |
|
Scalingcrm
scalingcrm.substack.com
|
primary | 11 | 9.1% | 2026-06-28 |
|
Scottbelsky
scottbelsky.substack.com
|
primary | 1 | — | 2026-06-14 |
|
Scottdclary
scottdclary.substack.com
|
primary | 7 | 0.0% | 2026-06-10 |
|
Scottmonty
scottmonty.substack.com
|
primary | 15 | 0.0% | 2026-06-07 |
|
Seanwinter
seanwinter.substack.com
|
primary | 5 | 0.0% | 2026-06-05 |
|
Seoriddler
seoriddler.substack.com
|
primary | 7 | 0.0% | 2026-06-16 |
|
Servicebusinessacademy
servicebusinessacademy.substack.com
|
primary | 2 | — | 2026-06-09 |
|
Setin6
setin6.substack.com
|
primary | 2 | — | 2026-06-03 |
|
Shane
shane.substack.com
|
primary | 1 | — | 2026-05-27 |
|
Shannonwatts
shannonwatts.substack.com
|
primary | 1 | — | 2026-05-29 |
|
Shaunaniequist
shaunaniequist.substack.com
|
primary | 3 | 0.0% | 2026-06-23 |
|
Shoddygoods
shoddygoods.substack.com
|
primary | 3 | 100% | 2026-06-23 |
|
Sidneywonder
sidneywonder.substack.com
|
primary | 2 | — | 2026-06-30 |
|
Silencebrand
silencebrand.substack.com
|
primary | 8 | 0.0% | 2026-06-06 |
|
Sixtoa
sixtoa.substack.com
|
primary | 6 | 0.0% | 2026-06-03 |
|
Sonderandtell
sonderandtell.substack.com
|
primary | 6 | 0.0% | 2026-06-18 |
|
Sophhirst
sophhirst.substack.com
|
primary | 1 | — | 2026-06-22 |
|
Sourceoftruth
sourceoftruth.substack.com
|
primary | 1 | — | 2026-06-17 |
|
Sovereignsignal
sovereignsignal.substack.com
|
primary | 2 | — | 2026-06-06 |
|
Soyb2b
soyb2b.substack.com
|
primary | 1 | — | 2026-05-20 |
|
Spendwithukraine
spendwithukraine.substack.com
|
primary | 1 | — | 2026-06-26 |
|
Startupeable
startupeable.substack.com
|
primary | 3 | 0.0% | 2026-06-24 |
|
Statuskuo
statuskuo.substack.com
|
primary | 2 | — | 2026-06-22 |
|
Steady
steady.substack.com
|
primary | 4 | 0.0% | 2026-06-14 |
|
Storytellingedge
storytellingedge.substack.com
|
primary | 1 | — | 2026-06-03 |
|
Strawberryjam
strawberryjam.substack.com
|
primary | 1 | — | 2026-05-26 |
|
Sulik
sulik.substack.com
|
primary | 1 | — | 2026-06-30 |
|
Swyx
swyx.substack.com
|
primary | 3 | 0.0% | 2026-06-26 |
|
Systemdesignone
systemdesignone.substack.com
|
primary | 2 | — | 2026-06-30 |
|
Talentcollective
talentcollective.substack.com
|
primary | 13 | 0.0% | 2026-06-30 |
|
Talentintelligencecollective
talentintelligencecollective.substack.com
|
primary | 1 | — | 2026-05-20 |
|
Talkenneagram
talkenneagram.substack.com
|
primary | 3 | 0.0% | 2026-05-17 |
|
Taylaburrell
taylaburrell.substack.com
|
primary | 12 | 0.0% | 2026-06-29 |
|
Tbpn
tbpn.substack.com
|
primary | 2 | — | 2026-05-19 |
|
Tecendoavida
tecendoavida.substack.com
|
primary | 2 | — | 2026-06-28 |
|
Tenderphoto
tenderphoto.substack.com
|
primary | 1 | — | 2026-06-17 |
|
Theaipixel
theaipixel.substack.com
|
primary | 7 | 0.0% | 2026-06-23 |
|
Theattneconomy
theattneconomy.substack.com
|
primary | 2 | — | 2026-06-11 |
|
Theazhikeaholics
theazhikeaholics.substack.com
|
primary | 2 | — | 2026-06-05 |
|
Theb2bdownload
theb2bdownload.substack.com
|
primary | 3 | 0.0% | 2026-06-01 |
|
Theb2bmarketingcommunity
theb2bmarketingcommunity.substack.com
|
primary | 1 | — | 2026-06-26 |
|
Thebulwark
thebulwark.substack.com
|
primary | 34 | 0.0% | 2026-06-11 |
|
Theemailmarketer
theemailmarketer.substack.com
|
primary | 4 | 0.0% | 2026-05-26 |
|
Theexperimentalmarketer
theexperimentalmarketer.substack.com
|
primary | 4 | 0.0% | 2026-06-24 |
|
Thefinancialengineer
thefinancialengineer.substack.com
|
primary | 2 | — | 2026-05-20 |
|
Thefreelancelife
thefreelancelife.substack.com
|
primary | 10 | 0.0% | 2026-06-28 |
|
Thegoodtrade
thegoodtrade.substack.com
|
primary | 1 | — | 2026-06-27 |
|
Thegtmnewsletter
thegtmnewsletter.substack.com
|
primary | 3 | 0.0% | 2026-06-28 |
|
Thehsprevolution
thehsprevolution.substack.com
|
primary | 2 | — | 2026-05-22 |
|
Thehumanproject
thehumanproject.substack.com
|
primary | 3 | 0.0% | 2026-06-09 |
|
Theleverage
theleverage.substack.com
|
primary | 4 | 0.0% | 2026-06-28 |
|
Thepollinatr
thepollinatr.substack.com
|
primary | 3 | 0.0% | 2026-06-08 |
|
Thequantummodel
thequantummodel.substack.com
|
primary | 1 | — | 2026-06-10 |
|
Therealreal
therealreal.substack.com
|
primary | 1 | — | 2026-06-22 |
|
Thesignalco
thesignalco.substack.com
|
primary | 2 | — | 2026-06-23 |
|
Theswingtrader
theswingtrader.substack.com
|
primary | 6 | 0.0% | 2026-06-15 |
|
Thesystematicwriter
thesystematicwriter.substack.com
|
primary | 1 | — | 2026-05-22 |
|
Thesystemsbrief
thesystemsbrief.substack.com
|
primary | 4 | 0.0% | 2026-06-18 |
|
Thetoolnerd
thetoolnerd.substack.com
|
primary | 6 | 0.0% | 2026-06-16 |
|
Theweeklyscrollbybuffer
theweeklyscrollbybuffer.substack.com
|
primary | 3 | 0.0% | 2026-06-12 |
|
Thinkbigpicture
thinkbigpicture.substack.com
|
primary | 1 | — | 2026-05-20 |
|
Thisweekinretail
thisweekinretail.substack.com
|
primary | 1 | — | 2026-05-26 |
|
Thomassmithson
thomassmithson.substack.com
|
primary | 3 | 0.0% | 2026-06-05 |
|
Threetimeswiser
threetimeswiser.substack.com
|
primary | 1 | — | 2026-05-20 |
|
Thrivewithcarrie
thrivewithcarrie.substack.com
|
primary | 1 | — | 2026-05-19 |
|
Tiktoktiktoktiktok
tiktoktiktoktiktok.substack.com
|
primary | 3 | 0.0% | 2026-06-09 |
|
Timeundertension
timeundertension.substack.com
|
primary | 4 | 0.0% | 2026-06-14 |
|
Tinyempires
tinyempires.substack.com
|
primary | 3 | 0.0% | 2026-06-21 |
|
Tjstocks
tjstocks.substack.com
|
primary | 10 | 0.0% | 2026-06-10 |
|
Tmindset
tmindset.substack.com
|
primary | 1 | — | 2026-06-22 |
|
Tonyamckenziepr
tonyamckenziepr.substack.com
|
primary | 3 | 0.0% | 2026-05-26 |
|
Toplinemedia
toplinemedia.substack.com
|
primary | 2 | — | 2026-05-26 |
|
Tradecompanion
tradecompanion.substack.com
|
primary | 8 | 0.0% | 2026-06-01 |
|
Trajectoryforeword
trajectoryforeword.substack.com
|
primary | 1 | — | 2026-06-08 |
|
Tweener
tweener.substack.com
|
primary | 14 | 0.0% | 2026-06-30 |
|
Tyhaney
tyhaney.substack.com
|
primary | 2 | — | 2026-06-11 |
|
Ultimatetoolsnewsletter
ultimatetoolsnewsletter.substack.com
|
primary | 2 | — | 2026-06-10 |
|
Unretire
unretire.substack.com
|
primary | 4 | 0.0% | 2026-05-28 |
|
Viatabuna
viatabuna.substack.com
|
primary | 1 | — | 2026-06-27 |
|
Vinnyobrien
vinnyobrien.substack.com
|
primary | 1 | — | 2026-06-03 |
|
Wamide
wamide.substack.com
|
primary | 2 | — | 2026-06-01 |
|
Watif
watif.substack.com
|
primary | 2 | — | 2026-05-18 |
|
Weareunserious
weareunserious.com
|
primary | 1 | — | 2026-05-01 |
|
Whattocook
whattocook.substack.com
|
primary | 2 | — | 2026-06-05 |
|
Whitepaper
whitepaper.substack.com
|
primary | 30 | 0.0% | 2026-06-30 |
|
Willdefries
willdefries.substack.com
|
primary | 4 | 0.0% | 2026-06-22 |
|
Wondertools
wondertools.substack.com
|
primary | 3 | 0.0% | 2026-06-11 |
|
Wordshop
wordshop.substack.com
|
primary | 1 | — | 2026-06-25 |
|
Workchronicles
workchronicles.substack.com
|
primary | 13 | 0.0% | 2026-06-29 |
|
Wrappconsulting
wrappconsulting.substack.com
|
primary | 1 | — | 2026-06-09 |
|
Writewithai
writewithai.substack.com
|
primary | 2 | — | 2026-06-07 |
|
Wtfseo
wtfseo.substack.com
|
primary | 1 | — | 2026-06-23 |
|
Www
www.substack.com
|
primary | 107 | 0.0% | 2026-06-30 |
|
Yoniargaman
yoniargaman.substack.com
|
primary | 2 | — | 2026-06-30 |
|
Yourpockettherapist
yourpockettherapist.substack.com
|
primary | 5 | 0.0% | 2026-06-24 |
|
Zchmael
zchmael.substack.com
|
primary | 14 | 0.0% | 2026-06-29 |
|
Zoescaman
zoescaman.substack.com
|
primary | 13 | 0.0% | 2026-06-19 |
|
Flipboard
flipboard.com
|
secondary | 2 | 0.0% | 2026-06-12 |
|
Circle
circle.so
|
secondary | 2 | 0.0% | 2026-06-03 |
|
Omnisend
omnisend.com
|
secondary | 1 | 0.0% | 2026-06-19 |
|
Flowium
flowium.com
|
secondary | 8 | 0.0% | 2026-06-13 |
IPs we've observed sending via Substack. "Brands" = distinct brands seen on each IP; "Placement" = where those emails landed in Gmail (inbox / promotions / spam). Click "reputation" to check the IP on Cisco Talos.
| IP | Hostname | Brands | Obs | Placement | Reputation |
|---|---|---|---|---|---|
| 161.38.199.249 | mg-199-249.static.mg-d0.substack.com |
20 | 33 | 10 | Check → |
| 159.112.244.47 | v547.v5375b7fa.use4.send.mailgun.net |
20 | 32 | 6 | Check → |
| 159.112.244.54 | v554.v5375b7fa.use4.send.mailgun.net |
16 | 32 | 8 | Check → |
| 159.112.244.32 | v532.v5375b7fa.use4.send.mailgun.net |
20 | 30 | 7 | Check → |
| 69.72.47.244 | mg-47-244.substack.com |
18 | 30 | 9 | Check → |
| 159.112.244.56 | v556.v5375b7fa.use4.send.mailgun.net |
18 | 29 | 8 | Check → |
| 159.112.244.45 | v545.v5375b7fa.use4.send.mailgun.net |
17 | 29 | 5 | Check → |
| 161.38.194.182 | mg-194-182.static.mg-d0.substack.com |
17 | 28 | 5 | Check → |
| 159.112.244.6 | v56.v5375b7fa.use4.send.mailgun.net |
16 | 28 | 5 | Check → |
| 159.112.244.41 | v541.v5375b7fa.use4.send.mailgun.net |
17 | 27 | 6 | Check → |
| 69.72.32.112 | mg-32-112.substack.com |
16 | 27 | 7 | Check → |
| 161.38.197.117 | mg-197-117.substack.com |
17 | 26 | 10 | Check → |
| 159.112.244.10 | v510.v5375b7fa.use4.send.mailgun.net |
18 | 25 | 4 | Check → |
| 161.38.202.253 | mg-202-253.substack.com |
16 | 25 | 3 | Check → |
| 159.112.244.12 | v512.v5375b7fa.use4.send.mailgun.net |
16 | 25 | 2 | Check → |
| 159.112.244.58 | v558.v5375b7fa.use4.send.mailgun.net |
13 | 25 | 3 | Check → |
| 159.112.244.59 | v559.v5375b7fa.use4.send.mailgun.net |
16 | 25 | 6 | Check → |
| 159.112.244.51 | v551.v5375b7fa.use4.send.mailgun.net |
18 | 25 | 4 | Check → |
| 159.112.244.44 | v544.v5375b7fa.use4.send.mailgun.net |
13 | 25 | — | Check → |
| 159.112.244.34 | v534.v5375b7fa.use4.send.mailgun.net |
16 | 24 | 10 | Check → |
| 159.112.244.5 | v55.v5375b7fa.use4.send.mailgun.net |
16 | 24 | 4 | Check → |
| 159.112.244.53 | v553.v5375b7fa.use4.send.mailgun.net |
17 | 24 | 3 | Check → |
| 161.38.195.184 | mg-195-184.substack.com |
16 | 24 | 6 | Check → |
| 159.112.244.46 | v546.v5375b7fa.use4.send.mailgun.net |
12 | 23 | 4 | Check → |
| 159.112.244.42 | v542.v5375b7fa.use4.send.mailgun.net |
19 | 23 | 4 | Check → |