I get asked some version of this question every few weeks: should I run my newsletter on Substack or move to a proper email marketing tool like MailerLite? The honest answer depends on what you're actually building. A publication that lives and dies by discovery and community needs different tooling than a business that needs segmentation, automation, and full ownership of its list.
Substack and MailerLite both get a newsletter into someone's inbox, but that's roughly where the overlap ends. One is a publishing network with a built-in audience layer. The other is a marketing platform you plug your own traffic into. This comparison breaks down pricing, audience mechanics, automation depth, SEO, deliverability, and monetization so you can figure out which one matches what you're actually trying to do in 2026.
Table of Contents
- What Substack and MailerLite Actually Are
- Pricing: Free Revenue Share vs Paid Subscription Tiers
- Built-In Audience, SEO, and Discovery vs Email Marketing Tools
- Automation, Segmentation, and Deliverability
- Design, Templates, and the Writing Experience
- Monetization Options Compared
- Which Platform Fits Which Kind of Writer
- Migrating, List Ownership, and the Verdict
What Substack and MailerLite Actually Are
Substack is a publishing platform first and an email tool second. Every post you write lives on a public page, gets indexed by search engines, and can surface to new readers through Substack's Notes feed, the Discover page, and recommendations from other writers on the network. Writing on Substack means plugging into an existing audience layer, not building your own list from zero. The platform handles hosting, billing, and distribution, and in exchange takes a cut of whatever you earn from paid subscriptions.
MailerLite is an email marketing platform, full stop. There's no public feed, no built-in discovery mechanism, and no social layer connecting your emails to people who've never heard of you. What you get instead is a full marketing toolkit: automation workflows, landing pages, A/B testing, e-commerce integrations, and segmentation granular enough to send a different message to every slice of your list. You bring your own traffic, and MailerLite helps you convert and nurture it once it arrives.
Those two starting points explain almost every other difference between the platforms. Substack optimizes for people finding you. MailerLite optimizes for what happens after someone already knows who you are.
Practical rule: if you're not sure which camp you're in, ask whether your growth plan depends on being discovered by strangers or on converting traffic you already control. Substack is built for the first case, MailerLite for the second.
Pricing: Free Revenue Share vs Paid Subscription Tiers
Substack's 10% Cut Explained
Substack is free to start and stays free unless you turn on paid subscriptions. There's no monthly platform fee at any point, regardless of list size. Once you accept paid subscriptions, Substack takes 10% of subscription revenue, and Stripe adds its own processing fee (roughly 2.9% plus $0.30 per transaction) on top of that, according to feebite's breakdown of Substack's fee structure. Combined, writers typically keep somewhere between 81% and 87% of what a subscriber pays, depending on subscription price, since the fixed Stripe fee eats a bigger percentage of lower-priced tiers.
That structure means Substack costs nothing if you never monetize. A free newsletter with 50,000 subscribers pays Substack zero dollars a month. A newsletter making $5,000 a month in paid subscriptions pays Substack roughly $500 plus Stripe's cut, and that cost only shows up once the revenue does.
MailerLite's Tiered Pricing
MailerLite charges a flat monthly fee based on subscriber count, regardless of whether you're monetizing at all. The free plan covers up to 250 subscribers and 2,500 emails per month. Paid plans start around $12/month for the Comfort tier and $25/month for the Power tier, with pricing climbing as your list grows, per EmailToolTester's current MailerLite pricing breakdown. A dedicated sending IP, useful once you're sending real volume, adds another $50/month on top of whatever tier you're on.
The practical difference comes down to what triggers the bill. Substack's cost is tied to revenue. MailerLite's cost is tied to list size. A free, unmonetized newsletter with 10,000 subscribers pays MailerLite a real monthly bill and pays Substack nothing. A 2,000-subscriber newsletter earning $3,000/month in paid subs might pay MailerLite a flat $25-40/month and pay Substack roughly $300 plus Stripe fees for that same revenue, a materially bigger cost once the list is monetized and small.
| Factor | Substack | MailerLite |
|---|---|---|
| Free tier | Unlimited subscribers, no paid features | Up to 250 subscribers, 2,500 emails/month |
| Paid cost driver | % of subscription revenue | Subscriber list size |
| Monthly platform fee | $0 | $12-25+/month on paid tiers |
| Dedicated IP | Not applicable | +$50/month |
| Best for | Unmonetized or subscription-based newsletters | List-size-driven marketing budgets |
Practical rule: if you're not charging subscribers yet, Substack is free no matter how big your list gets. MailerLite starts charging the moment you cross 250 contacts, whether or not you're making money from them.
Built-In Audience, SEO, and Discovery vs Email Marketing Tools
This is the core tradeoff between the two platforms. Substack's Notes feed and Discover page exist specifically to surface your writing to readers who've never heard of you. Every post you publish is also a public webpage that search engines can crawl and rank. New subscribers can and do arrive without you running a single ad, thanks to the network effect of being on a platform where readers are actively browsing for new writers to follow.
MailerLite has none of that layer. It's a closed system by design: your emails go to people who already gave you their address, and there's no public feed connecting your content to strangers browsing the platform. Growth on MailerLite comes entirely from traffic sources you build and own, whether that's a website, social channels, paid ads, or referral programs you set up yourself.
Search Traffic Is Substack's Quiet Advantage
Because every Substack post is a real, indexable URL, it can rank in Google independently of whether anyone on the platform ever sees it in Notes or Discover. Writers can edit the SEO title and meta description on individual posts, and Substack automatically generates a sitemap for search engines to crawl. Google traffic has become a legitimate acquisition channel for some Substack writers, with one writer reporting Google as their third-highest traffic source in a given month, converting thousands of page views into dozens of new subscriptions.
MailerLite campaigns, by contrast, are sent directly to inboxes and generally aren't publicly indexable in the same way, unless you're separately publishing that content somewhere else, like a blog built on MailerLite's landing page tools. If organic search is part of your growth plan and you're not already running a separate content site, Substack's default setup gets you most of the way there without extra work.
WriteStack's Notes generator helps close the other half of the discovery gap, since showing up consistently in the Notes feed is one of the biggest levers for organic growth on Substack specifically, separate from search traffic.
Practical rule: if your growth strategy assumes people will find you through search or the Substack network, use Substack. If your growth strategy is "I already have an audience somewhere else and need a better inbox tool," MailerLite's lack of discovery costs you nothing, because you weren't relying on it anyway.
Automation, Segmentation, and Deliverability
MailerLite wins decisively on marketing tooling. It offers visual automation workflows, behavior-based triggers, tagging, custom fields, A/B testing on subject lines and content, and dynamic segments built from any combination of subscriber activity. Want to send a different welcome sequence to people who clicked a specific link, or automatically re-engage subscribers who haven't opened an email in 60 days? MailerLite has the tooling built for exactly that, with a drag-and-drop workflow builder that doesn't require code.
Substack's automation is minimal by comparison. You get a basic welcome email, the ability to tag subscribers, and segmentation for sending to free versus paid audiences. There's no visual workflow builder and no behavior-triggered sequences beyond what ships natively with the platform.
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Explore Smart Scheduling| Capability | Substack | MailerLite |
|---|---|---|
| Welcome email | Yes, basic | Yes, fully customizable |
| Visual automation builder | No | Yes |
| Behavior-based triggers | No | Yes |
| A/B testing | Limited | Yes |
| Custom segments | Free/paid split only | Fully custom |
Where Emails Actually Land
Deliverability works differently across the two platforms because of how sending infrastructure is set up. MailerLite sends most accounts through shared IP addresses pooled across many customers, which works in your favor when the shared pool has a good reputation, and against you if other senders on that pool generate spam complaints. High-volume senders can pay for a dedicated IP to fully control their own sending reputation, but that's an added cost and only worth it above roughly 50,000 emails a week.
Substack manages its own sending infrastructure at the platform level, and because every Substack email comes from the same underlying system, deliverability is largely out of any individual writer's hands, for better or worse. Domain alignment and authentication still matter on both platforms, but writers on MailerLite have more direct levers to pull if delivery problems show up, since they can inspect campaign-level stats, adjust sending domains, and isolate the cause more precisely than Substack's more locked-down system allows.
Practical rule: if your newsletter is part of a larger funnel with onboarding sequences, lead magnets, or product launches, MailerLite's automation and deliverability controls will save real time and give you more to diagnose when something breaks. If you're writing and hitting send, you won't miss what Substack doesn't expose.
Design, Templates, and the Writing Experience
Substack's writing editor is built for long-form publishing. It's clean, distraction-light, and optimized for the writer-to-reader relationship rather than campaign design. There's no library of email templates to choose from, because there isn't one; every post uses Substack's standard layout, and customization options are intentionally limited so writers spend their time writing rather than fiddling with design.
MailerLite gives you a drag-and-drop email builder with dozens of templates, more granular design control, and the ability to build standalone landing pages alongside your campaigns. That flexibility is genuinely useful for visually branded marketing emails, product announcements, or anything that needs to look like a polished campaign rather than a personal letter, but it also means more setup time before your first send goes out.
Practical rule: writers who want to focus on the writing tend to prefer Substack's constraints. Marketers who need on-brand, highly designed emails get more out of MailerLite's template system, and are usually willing to trade setup time for that control.
Monetization Options Compared
Substack's monetization is built around paid subscriptions: a fixed monthly or annual price for access to premium posts, with optional founding member tiers for readers who want to pay more to support a writer directly, covered in more depth in WriteStack's guide to Substack's founding member tier. It's a single, well-tested model that Substack handles end to end, including billing, dunning, and subscriber management, without requiring any third-party tools.
MailerLite doesn't have a native subscription or paywall model in the same sense. Monetization happens through whatever you build around it: selling products or courses via its e-commerce integrations, running a paid community hosted elsewhere, or using email marketing to drive traffic to a separate sales page or checkout flow. It's more flexible in theory, since you're not limited to one business model, but you're assembling the pieces yourself instead of flipping a single switch.
Practical rule: if paid subscriptions to your writing are the whole business model, Substack's built-in paywall is simpler to launch and maintain. If you're selling a product, course, or service and the newsletter is one marketing channel supporting that, MailerLite's flexibility fits the job better.
Which Platform Fits Which Kind of Writer
A solo essayist or journalist building a subscription-based publication is usually better served by Substack. The discovery mechanics and the built-in paywall do most of the heavy lifting, and the free tier means there's no cost until the writing itself is generating revenue. Writers in this category are optimizing for readers, not customers, and Substack's whole design points at that goal.
A creator or small business using email as one channel among several, with a product, course, or service to sell, tends to get more value from MailerLite. The automation and segmentation tools support a funnel that Substack simply isn't designed for, and the flat pricing becomes predictable once a list stabilizes in size.
Writers running both a public-facing publication and a more targeted marketing list sometimes end up using both platforms at once: Substack for the publication and discovery layer, MailerLite or a similar ESP for a separate list tied to product launches or a paid community that lives outside Substack's ecosystem entirely. That combination is more setup work, but it lets each tool do the job it's actually built for instead of stretching one platform to cover both.
Migrating, List Ownership, and the Verdict
Exporting a subscriber list from either platform is straightforward. Both support CSV exports of email addresses, and importing a list into the other platform is a matter of uploading that file. What doesn't transfer cleanly is everything else: Substack's archive of published posts, the public URLs those posts live at, engagement history, and any SEO value those pages have accumulated over time.
Moving from Substack to MailerLite means leaving the discovery network behind entirely. There's no way to bring the Notes feed, Discover placement, or recommendation network with you, since those are tied directly to publishing on Substack itself, not to the subscriber list underneath it. Moving the other direction is simpler in practice: importing a MailerLite list into Substack is just a CSV upload, and it opens up the option to layer Substack's paid subscription and discovery features on top of a list already built somewhere else.
Practical rule: treat list ownership as portable, since the emails themselves move freely between platforms, but treat platform choice as closer to a one-way decision for anything discovery-related. You can always run both in parallel before committing fully to a migration in either direction.
Neither platform is better in the abstract, because they're solving different problems. Substack optimizes for discovery, simplicity, and a straightforward paid-subscription model, at the cost of automation and design flexibility. MailerLite optimizes for marketing control, segmentation, and deliverability tooling, at the cost of any built-in audience or discovery mechanism.
If you're starting a newsletter today with the goal of building a readership from scratch, Substack's free tier and discovery tools remove most of the early friction. If you already have traffic and need sophisticated email marketing to convert and retain it, MailerLite's toolkit will do more for you than Substack ever will, and no amount of Substack growth tactics will replace the automation you'd get natively from an ESP.
For writers choosing Substack, consistency on Notes and in the Discover feed is one of the biggest levers available for growth, worth treating as seriously as the writing itself. WriteStack's scheduling and heatmap tools exist specifically to help writers post consistently and time it around when their specific audience is actually online, and the fan-tracking dashboard helps identify which readers are engaged enough to convert into paid subscribers. If you're building on Substack and want the discovery side of the platform working harder for you, WriteStack is worth a look.