
HubSpot
Brevo
MailChimp
Loops.so
Intercom
Synthesio
TitanMLM
We make it easy to send emails triggered by user behavior. Build, measure and improve your emails to activate and retain users

Ghost
Medium
Buttondown
WordPress
MailChimp
beehiiv
Notocat
With Substack, anyone can start a publication that combines a personal website, blog, and email newsletter or podcast. It's quick and simple.
Which is more popular?
Based on our record, Substack should be more popular than Customer.io. It has been mentioned 105 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | customer.io | substack.com |
| Pricing | — | |
| Company | — | Startup from the United States |
| Listed in |
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Intercom vs Customer.io vs Zendesk Connect? What's the Best Tool?
More videos
Monetizing Podcasts and Newsletters - Chris Best of Substack and Jonathan Gill of Backtracks
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Customer.io and Substack. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


With a focus on messaging, Customer.io lets you create sales workflows around various pushes and nudges, across a range of channels. Email, SMS messages, and push notifications can all be built into an engagement...
What's more, Customer.io offers advanced automated or API-triggered workflows and various advanced functionalities like time delay or time windows to ensure that you reach customers at the best time for them to take...
Did you find any good option in place of customer.io ? As customer.io seems very expensive once your contact numbers increase.
Substack offers writers of all experience levels the ability to write an email newsletter that’s profitable through subscriptions. Substack provides purpose-built web and newsletter publishing tools to enable writers...
What sеts Substack apart is its sеamlеss intеgration of contеnt crеation and subscription-basеd monеtization. Substack’s usеr-friеndly intеrfacе, distribution tools, and support for various contеnt formats make it a...
Substack and Medium differ primarily in their monetization methods. Medium pays creators based on reader engagement, while Substack enables writers to monetize directly through paid subscriptions to their newsletters....
Recommendations tracked on public social media and blogs since March 2021.


If you already use a customer engagement platform like Intercom or Customer.io, you might integrate failed payment events there and use their messaging capabilities. - Source: dev.to / over 1 year ago
I just added SMS as a messaging channel to Dittofeed (MIT licensed customer.io alternative). Source: almost 3 years ago
Sounds like you need good old automation. Zapier, customer.io, pipedream are some. Source: over 3 years ago
For anyone that would like to see more quantizations tested, I can highly recommend paying a few bucks for oobabooga's testing, which is published on his Substack: https://substack.com/@oobabooga. - Source: Hacker News / 8 days ago
Reminds me of this meme: https://substack.com/@tomasbjartur/note/c-323840878?r=6cjtqn. - Source: Hacker News / 12 days ago
Valid criticisms of AI - safety critics who think AI can take over the world like Yud (I find this the least credible but still valid) - Bernie type of critics who think AI can cause widespread job losses - Ruxandra Teslo who thinks AI... - Source: Hacker News / 15 days ago
When comparing Customer.io and Substack, you can also consider the following products.

Grow Better With HubSpot: Software that's powerful, not overpowering. Seamlessly connect your data, teams, and customers on one CRM platform that grows with your business.
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Ghost is a fully open source, adaptable platform for building and running a modern online publication. We power blogs, magazines and journalists from Zappos to Sky News.
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Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.
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Welcome to Medium, a place to read, write, and interact with the stories that matter most to you.
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MailChimp is the best way to design, send, and share email newsletters.
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Buttondown is the best way to start and run your newsletter
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