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Substack vs Mailchimp 2026: The Paywall vs the Marketing Suite
By Arthur Brulard, Founder of OwnLetter. Cross-vendor analyst review across 11 newsletter platforms, aggregating user signals from Reddit, G2, Capterra, Trustpilot, and Hacker News. LinkedIn
Published June 11, 2026 · Updated June 11, 2026 · 20 min read
Quick verdict
Neither platform is the obvious winner; they fail in opposite directions. Substack is a publishing platform with a native paywall: it takes 10 percent of paid revenue but builds the checkout, the paywall and a discovery network for you, and costs nothing until you earn. Mailchimp is a marketing platform:real automation, full list ownership and a 0 percent cut of revenue, but no native paid-subscription paywall at all, and it bills by total contacts (including unsubscribed ones), so a big free list costs real money at zero revenue. Move to Mailchimp if you monetize through products, services or sponsorships and want marketing automation. Stay on, or pick, Substack if your business is paywalled posts. Two caveats decide the rest: Mailchimp's per-contact billing punishes free lists, and Intuit said in May 2026 it is reducing investment in Mailchimp. We earn nothing from either.
Both are free to start. Substack is free until you earn; Mailchimp's free plan covers 250 contacts and 500 sends a month. Neither link pays us.
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How we testedVerified June 2026 · 2514 reviews aggregated · Substack + Mailchimp tested · 37 sourced claims · pricing from our weekly tracker · methodology public
What we did: Read user signals in full: 2,034 Mailchimp reviews (Capterra, Reddit, G2, Trustpilot) and 480 Substack reviews, aggregated June 2026, mapped theme by theme with no keyword sampling. Pulled pricing from our weekly automated tracker (verified June 9, 2026). Re-fetched both vendors' primary pages live on June 11, 2026: Mailchimp's pricing and help pages (free-tier limits, contact-count rules), the marketing-automation and acceptable-use pages, Substack's going-paid and cost pages, and both Trustpilot aggregates. Verified the May 2026 Intuit reduced-investment announcement against MarTech and Intuit's filings. Captured and annotated screens as proof. First-hand: we operate a test Substack publication (hands-on log, June 10, 2026); we have not run a paid Mailchimp account.
What we did NOT do: We did not run deliverability seed-list tests (they violate both vendors' terms and game the result). We did not test Mailchimp's paid plan hands-on, so no Mailchimp claim here is presented as first-hand product testing. We did not invent a Trustpilot or deliverability figure.
Refresh cadence: Pricing re-verified weekly by automation; claims manifest with source URL per numeric claim publicly available. Next full refresh September 2026. (pricing verified June 9, 2026). Full methodology →
SubstackSubstack
MailchimpMailchimpTwo Cost Models That Punish Opposite Things
The clearest way to understand this matchup is that the two platforms charge for completely different things. Substack's support center is plain about its cut, "10% of each transaction," plus Stripe's 2.9 percent + $0.30 and a 0.7 percent recurring billing fee. Its going-paid page words the same fact as its inverse: "Writers keep 90% of their revenue minus credit card fees." That is a tax on revenue: it is zero on a free list and grows only as you earn. Mailchimp charges the opposite way. There is no cut of your revenue at all, but you pay a flat monthly price by number of contacts, and Mailchimp's own help is explicit that the count includes the people who left: "Subscribed, unsubscribed, and non-subscribed contacts are included in your contact count." That is a tax on list size, owed whether or not anyone is paying you.
The consequence is a clean fork. If you have a big free list and little revenue, Substack is far cheaper, often free, while Mailchimp bills you for every dormant contact. If you earn well relative to your contact count, Mailchimp's flat price can beat Substack's 10 percent. But there is a structural catch that no fee math fixes: Mailchimp has no native paywall, so it cannot charge your readers a subscription at all without a third-party processor bolted on. Substack's entire reason to exist is that paywall. The scenarios table further down shows both directions, derived from our weekly pricing tracker rather than copied from another blog.
Feature Comparison: Publishing, Monetization, Automation, Growth
The split is sharp. Mailchimp brings the marketing toolbox Substack never built: Customer Journey automations, tag and behavioral segmentation, A/B testing, a website builder, landing pages, and 300+ integrations. Substack brings the things a marketing tool cannot fake: a native paid-subscription paywall, a discovery network, native podcast and video, and a start that asks you for no decisions. Each is strong exactly where the other is empty. The matrix below is data-driven from the OwnLetter feature layer, source-verified against vendor primary documentation (June 2026), with Mailchimp newly added to that layer this month.
Pick a plan from the ▾ menu under a platform to see what that plan unlocks and its price at your subs count.
| Feature | Substack | Mailchimp |
|---|---|---|
| Monthly priceat 2.5K subs · monthly | 10% of revenue | $45/mo · Essentials · 2.5K subs |
| 5/6 | 0/6 | |
| 2/5 | 4/5 | |
| 6/9 | 9/9 | |
| 7/9 | 9/9 | |
| 2/4 | 4/4 | |
| 3/5 | 5/5 | |
| 8/10 | 8/10 | |
| 5/5 | 2/5 | |
| Get started | Try free → | Try free → |
✓ Yes · Partial · — No · dotted = unverified · a plan tag (e.g. Scale) = the cheapest plan that unlocks it; pick a plan above each column and ↑ marks features above it. Verified against vendor sources, June 2026.
Straight from the reviews
What real users say
Each site’s average below comes from its own user reviews across Reddit, Trustpilot, Capterra and G2 — the count per site is on each bar. We never invent a quote.
Average score on each review site
SubstackMailchimpPraised · Complaint · Split opinion
Average scores pulled from each site on May 31, 2026. Trustpilot scores are a recent sample, not the lifetime average; Reddit has no star ratings. Substack isn't listed on Capterra, and on Substack Trustpilot skews toward readers and Reddit toward creators. See our methodology.
Read the rating split carefully: Mailchimp scores far higher on Capterra (business users praising ease) than on Trustpilot (a billing-and-suspension crisis population). One number alone misleads, which is why we show all three.
Theme by theme: where they agree and differ
| What users say about… | Substack480 reviews read | Mailchimp2034 reviews read |
|---|---|---|
| Mailchimp leads | ||
| Substack leads | ||
| Substack leads | ||
| Even | ||
| Mailchimp leads | ||
| Even | ||
| See for yourself | Try free → | Try free → |
▲ Praised · ▼ Complaint · ◆ Mixed · top theme / common / minor = how often readers bring it up · ❝ hover any cell for the exact count and a real, sourced quote · · = too few reviews to score. Read in full from Reddit, Trustpilot, G2 and Capterra, June 2026. We never invent a quote.
Review sources:RedditTrustpilotG2Capterra
Deep Dive: Substack
Across 480 Substack community posts and reviews read in full (Reddit, Trustpilot, G2, June 2026), three patterns dominate: the native paywall and discovery network genuinely work for writers, the toolset stops at publishing, and the fee model stays invisible until the month it is not.
The paywall and the network: what Mailchimp cannot match
Substack's whole design is paid publishing. The paywall, the tiers, and a checkout readers already trust are built in, and the subscriber relationship is yours to bill. On top of that sits a discovery engine: Substack claims that 30 percent or more of paid subscriptions come from inside its network (substack.com/about, June 2026; self-reported, no third-party audit). Whatever the true figure, Notes and cross-publication recommendations push your writing to readers who never searched for you. In our corpus, discovery is the second most-mentioned theme (35 mentions, mixed). One Reddit user, May 2026: "it's one of the best newsletter platforms out there for discovery if you have no audience."
The same corpus names the limit honestly:
"The hard truth is most of your early readers will be other writers, not general readers, and breaking out of that circle is genuinely difficult."Reddit user (r/Substack source), June 2026 (C-005)
The network is a real advantage with a saturation curve, not a growth guarantee. But it is a guarantee Mailchimp simply cannot offer, because Mailchimp has no feed, no recommendations, and no paywall to convert that attention into paid readers in the first place. If you are starting from zero and want to charge for your writing, this combination can outweigh every fee and feature below it.
Where Substack stops: automation and segmentation
Substack is a publishing tool, not an email-marketing platform, and the corpus is blunt about the ceiling. A Trustpilot reviewer in March 2026:
"As a newsletter platform it falls short on the fundamentals: segmentation is basic, automation is almost non-existent, analytics are surface-level, and monetisation options are limited."Trustpilot reviewer, March 2026 (C-004)
When we created our own test publication (hands-on, June 10, 2026), there was no sequence builder to find, no behavioral trigger, no way to send a welcome series beyond the single automatic welcome email. For a simple paid-or-free newsletter that is fine. For anything resembling a funnel, it is a wall, and it is exactly the wall Mailchimp's Customer Journeys are built to remove.
Our take
Where Substack Falls Short
- Automation and segmentation barely existThis is the gap Mailchimp fills. A Trustpilot reviewer summed up Substack in March 2026: "segmentation is basic, automation is almost non-existent, analytics are surface-level." Substack's help center documents no multi-step sequence builder; drip campaigns are in a restricted beta, and tags organize content rather than audience targeting. If your roadmap needs welcome series, behavioral triggers, or send-time logic, Substack does not serve it.
- The 10 percent compounds with your successSubstack charges nothing monthly and 10 percent of each paid transaction, plus Stripe's 2.9 percent + $0.30 and a 0.7 percent recurring billing fee (support.substack.com, verified June 2026). At $1,000 per month in paid revenue that is $100 every month; at $5,000 monthly it reaches $500. The fee is invisible early because no bill ever arrives, which is exactly how it stays out of mind until it is large. It taxes your success, not your list size.
- Zero human support, by designSupport is the dominant complaint theme in our 480-review Substack corpus (58 mentions). The pattern is uniform: no ticket system, no human escalation, an AI chatbot that summarizes your problem and stops. One Trustpilot reviewer in May 2026: "there is literally ZERO human support." Mailchimp's live chat, by contrast, is praised by paying users, though it is near-absent on the free plan a Substack refugee usually lands on.
- A breach, and a network you don't controlIn October 2025 Substack suffered a data breach exposing roughly 663,000 account records (emails, profile data, a subset with phone numbers). Beyond security, the acquisition engine that makes Substack attractive (Notes, Recommendations) is an algorithm you do not control: it can push your work to readers, or quietly stop. The discovery is real, but it is borrowed reach, not an owned channel.
Deep Dive: Mailchimp
Across 2,034 Mailchimp reviews (Capterra, Reddit, G2, Trustpilot, June 2026), the most-praised element by far is ease of use, the genuine advantage over Substack is real marketing automation, and the most underrated costs are a billing model that counts the dead and a platform Intuit is pulling back from.
The easiest on-ramp in the category, and the tools to match
Ease of use is Mailchimp's single most-cited strength (773 mentions, the dominant positive theme). A Capterra reviewer in December 2025:
"Mailchimp is fairly easy to use. The interface is clean and intuitive and I love how quickly our team was able to put together professional-looking emails without needing design help."Capterra reviewer, December 2025 (C-015)
Behind the friendly editor sit the tools Substack never built: Customer Journey automations from the Essentials plan, tag and behavioral segmentation, A/B testing, scheduled sending, a 1-to-5 star engagement rating, and the largest integration ecosystem in the category (Mailchimp states "over 300" integrations). For a writer who wants a welcome series, behavioral triggers, or a Shopify connection, this is the real draw, and it is genuine.
One Reddit operator put the whole trade in a single line, and it is worth holding onto before the cost section below:
"Mailchimp wins on polish. the editor is the friendliest in the category, templates look good out of the box, a non-marketer can send something decent unaided. you pay for that, and the price scales aggressively as your list grows. that's the catch everyone eventually hits." Reddit user (r/Emailmarketing source), May 2026 (C-035)
The automation is real, but mid-tier
Set expectations correctly: Mailchimp's automation is a real step up from Substack's nothing, but it is not best-in-class. A G2 reviewer in March 2026:
"The automation builder feels dated and lacks the flexibility needed for more sophisticated customer journeys."G2 reviewer, March 2026 (C-017)
If your funnels are simple (welcome, re-engagement, a tag-based sequence), Mailchimp handles them well. If you need multi-branch journeys and conditional logic at the level of Klaviyo or ActiveCampaign, you will hit a ceiling here too, just a much higher one than Substack's.
The bill that counts the dead
Mailchimp's pricing model is the most underrated cost of switching. You pay by total contacts, and unsubscribed and non-subscribed contacts are counted; only archived, cleaned, or deleted contacts stop billing. Price and value is the second-strongest theme in the corpus (748 mentions, negative-dominant), and the billing surprises are sharp:
"Showed $14/mo in my dashboard then charged me $566 automatically for contacts which I already deleted."Trustpilot reviewer, December 2025 (C-020)
A Substack writer who arrives with a large free list is the worst-case profile for this model: the list that was free to keep on Substack becomes a monthly line item on Mailchimp. Prune aggressively, and budget for the bill to climb as you grow, especially given that post-Intuit price increases are a distinct grievance (159 mentions) and Intuit confirmed in May 2026 it is reducing investment in the product.
Our take
Where Mailchimp Falls Short
- No native paid-subscription paywall at allMailchimp is a marketing platform, not a publishing one. It has no built-in paywall and no recurring-subscription product: to charge readers you bolt on a third-party processor (Campaignzee, MoonClerk) through Stripe and the API, and you maintain that checkout yourself. For a Substack writer whose business is paywalled posts, this is the single most important thing Mailchimp does not do, and no amount of automation makes up for it.
- You pay for contacts you can never emailMailchimp bills by total contacts, and its own help is explicit: "Subscribed, unsubscribed, and non-subscribed contacts are included in your contact count." Only archived, cleaned, or deleted contacts stop counting. A subscriber who left two years ago keeps consuming a paid slot until you manually purge them. The sharpest review verbatim in our corpus: "Showed $14/mo in my dashboard then charged me $566 automatically for contacts which I already deleted." A big free list is a recurring bill, not an asset.
- Expensive at scale, and the bill keeps climbingPrice and value is the second-strongest theme in our 2,034-review corpus (748 mentions, negative-dominant). Per-contact pricing scales aggressively: users above 5,000 to 10,000 contacts report bills two to five times competitors' for the same list. Post-Intuit increases are a distinct grievance (159 mentions, "more than doubled"), and the May 2026 reduced-investment announcement means you are paying more for a product with less active development.
- Opaque suspensions, and an affiliate-content banAccount suspension is a documented theme (110 mentions): accounts disabled for an "unspecified compliance review," automations stopping immediately, support unable to explain. Mailchimp's acceptable-use policy additionally prohibits affiliate marketing as a category, alongside crypto, MLM, and gambling. A newsletter monetized with affiliate links, a common creator model, can run afoul of that policy on a platform that suspends without a clear appeal.
- Built for e-commerce, recognizable by everyoneMailchimp's UX and templates are tuned for shops and small businesses more than for writers, and reviewers note it. Emails come out recognizably "Mailchimp-like": fast for generic needs, but the templates are a recognizable style and advanced layout (column widths, custom fonts) needs HTML. There is no creator discovery network of any kind. The easy on-ramp is real, but the interface becomes "a labyrinth" (a recurring corpus phrase) once you move past basic campaigns.
Who Controls Your Audience? Two Different Risks
Leaving Substack for Mailchimp does not buy you out of platform risk; it swaps one shape of it for another. Mailchimp lets you genuinely own and export your list (subscribed, unsubscribed and cleaned contacts in separate folders), keeps 0 percent of your revenue, and exposes a full Marketing API, all real advantages over Substack's revenue cut and export-once-locked pattern. But Mailchimp's own risks are sharp: it bills you for contacts you cannot email, its acceptable-use policy bans affiliate marketing as a category, it suspends accounts for an unspecified "compliance review," and Intuit is reducing its investment in the product.
Substack, for its part, takes a content license, routes disputes to arbitration, reserves discretionary termination, and suffered a 663,000-account breach in October 2025. The table below is drawn from our trust-and-risk layer (Mailchimp newly added this month), with verbatim clauses and documented incidents on hover.
Trust and risk: Substack vs Mailchimp
| Platform | Account control | Content license | Cost at scale | Vendor longevity | Billing model | Allowed niches |
|---|---|---|---|---|---|---|
| Substack | ||||||
| Mailchimp |
✓ favorable to the creator · ◐ mixed · ✗ unfavorable. Hover or tap a cell for the detail. Compiled June 2026 from public terms, status pages and the pricing data layer. Re-verified quarterly.
Pricing Scenarios: Who Actually Pays More
Unlike most matchups on this site, the cheaper platform here genuinely depends on your situation, and Mailchimp is often the more expensive one. The rule is simple: Substack taxes revenue, Mailchimp taxes contacts.A big free list with little revenue pays almost nothing on Substack and a real monthly bill on Mailchimp. A tight list earning real money pays Substack's 10 percent and can save on Mailchimp's flat tier, but only if you have bolted on a third-party paywall, because Mailchimp cannot charge subscriptions on its own. Stripe processing applies on both sides and washes out. The two highlighted rows below are the ones that catch people.
Mailchimp Pricing Tiers (verified June 2026)
- · Free: Free up to 250 subs. Up to 250 contacts and 500 sends per month (250/day). One audience, Mailchimp badge required. No scheduling, no real automation flows.
- · Essentials: $45/mo (Essentials, 3K subs) · verified June 9, 2026 at 2,500 contacts ($110/mo at 10K). Scheduling, A/B testing, basic Customer Journeys, remove the badge.
- · Standard: $60/mo (Standard, 3K subs) · verified June 9, 2026 at 2,500 contacts ($135/mo at 10K, $310/mo at 25K). Send-time optimization, advanced segmentation, custom-coded templates, the AI writing tools.
- · Premium: $350/mo (Premium, 10K subs) · verified June 9, 2026 at 10,000 contacts. Multivariate testing, advanced reporting, unlimited seats. For larger teams.
- · Substack (no tiers): Free to start, unlimited subscribers. 10 percent of paid subscription revenue plus Stripe fees, with the paywall and checkout built in. No flat-rate alternative.
Annual Cost by Scenario
Annual platform cost by scenario (Substack 10% vs Mailchimp Standard per contact)
Scenario Paid revenue + contact count | Substack (10% of revenue) $0 on a free list | Mailchimp Standard (per contact) Billed on total contacts | Annual delta Positive = Mailchimp costs MORE |
|---|---|---|---|
| $0/mo paid, 10,000 contacts | $0/yr | $135/mo → $1,620/yr | +$1,620/yr (Mailchimp costs more) |
| $1,000/mo paid, 2,500 contacts | $1,200/yr | $60/mo → $720/yr | −$480/yr (Mailchimp saves, if you add a paywall) |
| $5,000/mo paid, 10,000 contacts | $6,000/yr | $135/mo → $1,620/yr | −$4,380/yr (Mailchimp saves) |
| $200/mo paid, 25,000 contacts | $240/yr | $310/mo → $3,720/yr | +$3,480/yr (Mailchimp costs far more) |
$0/mo paid, 10,000 contacts
- Substack (10% of revenue)
- $0/yr
- Mailchimp Standard (per contact)
- $135/mo → $1,620/yr
- Annual delta
- +$1,620/yr (Mailchimp costs more)
$1,000/mo paid, 2,500 contacts
- Substack (10% of revenue)
- $1,200/yr
- Mailchimp Standard (per contact)
- $60/mo → $720/yr
- Annual delta
- −$480/yr (Mailchimp saves, if you add a paywall)
$5,000/mo paid, 10,000 contacts
- Substack (10% of revenue)
- $6,000/yr
- Mailchimp Standard (per contact)
- $135/mo → $1,620/yr
- Annual delta
- −$4,380/yr (Mailchimp saves)
$200/mo paid, 25,000 contacts
- Substack (10% of revenue)
- $240/yr
- Mailchimp Standard (per contact)
- $310/mo → $3,720/yr
- Annual delta
- +$3,480/yr (Mailchimp costs far more)
Mailchimp figures are Standard-tier monthly prices from our weekly tracker, annualized. The paid rows assume you have added a third-party paywall, since Mailchimp cannot sell subscriptions natively. The two highlighted rows show Mailchimp costing more, the case a Substack writer with a big free list usually lands in.
Test Your Own Scenario
Adjust paid subscribers, revenue per subscriber, and list size to find your own crossover, including the contact-count effect of a large free list. (Remember Mailchimp needs a third-party paywall to charge subscriptions at all.)
Break-even answer (static fallback)
Loading interactive calculator... Static answer below.
Break-even sits at $430 monthly paid revenue. Substack takes 10 percent of paid revenue plus Stripe processing fees. Beehiiv Scale costs $43 per month on annual billing at the 1,000-subscriber baseline, with 0 percent platform fee on paid subscriptions. Above $430 monthly paid revenue, Beehiiv compounds savings every month.
Sample math: at $5,000 monthly revenue, Substack costs $500/mo ($6,000/yr) and Beehiiv Scale costs about $78/mo ($$936/yr) at the 5K subscriber tier on annual billing. Annual savings exceed $5,000.
Migration: Your Free List Moves, Your Paywall Does Not
Here is the part most comparisons skip. Your free subscribers import cleanly: export the CSV from Substack, import to Mailchimp, and authenticate your sending domain. The problem is everything that made Substack worth paying for. Substack's paid subscriptions bill through a Stripe account Substack controls, and Mailchimp has no native subscription product to receive them, so there is no paywall to migrate to. Your paying readers cannot transfer; you would have to stand up a third-party checkout (Campaignzee, MoonClerk) and ask every paying subscriber to re-subscribe through it. For a paid Substack, this is not a migration, it is a rebuild of your business model.
There is one more trap specific to Mailchimp's billing. Import your full Substack list and every unsubscribed and inactive contact starts counting toward your bill the moment they land. Before you import, prune: drop the dead weight on the way in, not after the first invoice. And keep documenting your automations separately, because a compliance suspension takes the workflows with it.
The honest summary: moving a free Substack to Mailchimp to gain automation is reasonable. Moving a paid Substack to Mailchimp means giving up the native paywall entirely, and most writers in that position are better served by a platform that keeps the subscription model, which is the comparison we make in our Substack vs Beehiiv guide.
Who Switches, and Who Should Stay
Who the switch to Mailchimp pays off for
The writer Mailchimp rewards has a specific profile: they monetize through products, services, sponsorships or e-commerce rather than paywalled posts, they keep a tight, engaged list rather than a sprawling free one, and they want marketing automation Substack does not offer. A creator selling a course or running a shop, emailing a curated 2,500-person list, gains real automation and integrations while keeping 100 percent of revenue, and Mailchimp's contact-based price stays reasonable at that size. The corpus is full of small businesses and solo operators who stay precisely because the tooling and integration ecosystem fit how they sell.
Who should stay on Substack, and why that is rational
If your business is paid subscriptions, Substack is hard to leave for Mailchimp, because Mailchimp cannot replace the one thing you rely on: the paywall. Add a large free list, and Mailchimp's per-contact billing turns an asset into a monthly cost while Substack still charges nothing on it. Substack readers also convert to paid at rates multi-platform creators describe as unusually high: "People on Substack are a lot more inclined to pay" (Reddit, March 2026). For a paywalled-posts writer growing through the network, leaving for Mailchimp trades a working revenue model for a toolbox aimed at a different job.
Account risk exists on both, with different shapes
Substack suspension reports center on opacity (no rule cited, generic appeal rejections). Mailchimp's are operational: 110 suspension mentions across the corpus, accounts disabled for an "unspecified compliance review," automations stopping immediately, and an acceptable-use policy that bans affiliate marketing outright, a real exposure for a creator who monetizes with affiliate links. Both platforms can switch you off. Whoever hosts you, the monthly CSV export habit stands, and on Mailchimp the monthly prune habit alongside it.
Email Deliverability: What Neither Platform Publishes
Neither Substack nor Mailchimp publishes an audited inbox-placement rate, and we will not invent one. In our corpus, deliverability is a minor theme on Substack (8 mentions: open rates dropping after migrations, Gmail Promotions placement) and a larger, mixed one on Mailchimp (150 mentions). Mailchimp was historically praised for deliverability, but 2025-2026 reviews are more cautious. One expert reviewer named the structural reason: on a large shared platform, your inbox placement rides on the collective reputation of everyone else sending from it, and on Mailchimp "most people on MC don't know what they're doing," which can drag the shared reputation down.
The structural difference is control. Substack runs entirely on shared sending infrastructure, with no custom sending domain, so you cannot manage your own reputation at all. Mailchimp lets you authenticate a custom sending domain (DKIM and DMARC), which is more control but also more shared-pool exposure than a smaller, stricter sender. If deliverability decides your choice, test with your own list and content before committing, and distrust any published percentage, including any you wish we had printed here.
Frequently asked
Frequently Asked Questions
Is Mailchimp cheaper than Substack?
It depends entirely on your list-to-revenue ratio, and often it is more expensive. Substack takes 10 percent of paid revenue and costs $0 on a free list. Mailchimp bills by total contacts (its own help confirms unsubscribed and non-subscribed contacts are counted), so a 10,000-contact free list costs around $135/mo on Mailchimp's Standard plan even at zero revenue, while Substack charges nothing. Mailchimp only becomes the cheaper option once your paid revenue is high relative to your contact count, for example a tight 2,500-contact list earning $1,000 a month (Substack's 10 percent is $1,200 a year; Mailchimp Standard at that size is $60/mo). Run your own numbers in the calculator on this page, and remember Mailchimp cannot charge for a paywall natively at all.
Can Mailchimp run a paid newsletter like Substack?
Not natively, and this is the single biggest reason a paid Substack writer should think twice. Mailchimp has no built-in paywall and no recurring-subscription product. To charge readers you bolt on a third-party processor (Campaignzee, MoonClerk, and similar) through Stripe and Mailchimp's API, and you build and maintain the checkout yourself. Substack's entire job, by contrast, is paid publishing: the paywall, the checkout, and the subscriber billing are built in and your readers already trust them. If your business is paywalled posts, Mailchimp is a downgrade on the one thing that matters most.
Why do people say Mailchimp's free plan got worse?
Because it did, repeatedly. Mailchimp's free plan is now capped at 250 contacts and 500 sends per month with a 250-per-day limit (verified live on mailchimp.com, June 2026), down from 500 contacts and, earlier, 2,000. Reviewers describe features being stripped from the free tier "until it became basically useless," with steady pressure to upgrade. Substack's free tier is the opposite: unlimited subscribers, no monthly fee, and it only ever costs you the 10 percent once you actually earn. For a writer starting out, that difference is large.
Does Mailchimp have automation and segmentation Substack lacks?
Yes, and genuinely so. Mailchimp ships Customer Journey automations (from the Essentials plan), tag and behavioral segmentation, A/B testing, a 1-to-5 star engagement rating, scheduled sending, and 300+ integrations. Substack has almost none of this: reviewers call its automation "almost non-existent" and segmentation "basic." The honest caveat is that Mailchimp's automation is mid-tier, not best-in-class: reviewers call the Customer Journey builder "dated" and lacking flexibility for sophisticated journeys versus Klaviyo or ActiveCampaign. It is a real step up from Substack's zero, not a power-user CRM.
Is Mailchimp a safe long-term bet?
It is owned by Intuit, which acquired it in 2021 for about $12 billion, so it is not at risk of shutting down. But in May 2026 Intuit publicly named Mailchimp as an area of reduced investment, as part of a company-wide cut of roughly 3,000 roles (about 17 percent) and a refocus on AI; Intuit is keeping Mailchimp and running it for cash flow rather than growth, having weighed a sale but not pursued one on the terms available (reported by MarTech, alongside Intuit's FY26 earnings statements). Combined with steady post-acquisition price increases and the per-contact billing model, the trajectory is a more expensive product with less active development, which is worth weighing for a multi-year newsletter.
How We Built This Comparison
OwnLetter operates as a lab-style analyst, not a power-user reviewer. We read 2,514 unique user signals in full (2,034 Mailchimp, 480 Substack) across Reddit, Trustpilot, G2 and Capterra, aggregated June 2026; no keyword sampling. Pricing comes from our weekly automated tracker (verified June 9, 2026) and is rendered from that data, never typed by hand. On June 11, 2026 we re-fetched both vendors' primary pages live: Mailchimp's pricing and help pages (free-tier limits and the contact-count rule), the marketing-automation and acceptable-use pages, Substack's going-paid and cost pages, and both Trustpilot aggregates. We verified the May 2026 Intuit reduced-investment announcement against MarTech and Intuit's filings.
All 37 claims in our manifest carry a source URL and verification status (27 verified against a primary source, the rest attributed to the review corpus or flagged as a derived editorial judgment). Zero claims are invented. First-hand status, stated plainly: we operate a test Substack publication (hands-on log, June 10, 2026); we have not run a paid Mailchimp account, so nothing on this page presents Mailchimp's product as "tested by us." Full methodology →
Affiliate status:we are in neither Substack's nor Mailchimp's affiliate program, so this page earns us nothing. We flag that as a trust asset: the verdict has no commission behind it, in either direction.
Sources
- · Mailchimp marketing pricing page (verified June 11, 2026)
- · Mailchimp help: pricing plans, free-tier limits, and the contact-count rule (verified June 11, 2026)
- · Mailchimp acceptable-use policy (affiliate-marketing prohibition) (verified June 11, 2026)
- · Mailchimp: managing recurring payments (no native subscriptions) (verified June 11, 2026)
- · MarTech: what Intuit's layoffs and reduced investment mean for Mailchimp (verified June 11, 2026)
- · Substack support: How much does Substack cost? (verified June 11, 2026)
- · Substack going-paid page (native paywall, "keep 90%" framing) (verified June 11, 2026)
- · Trustpilot Mailchimp reviews (2.6/5, read live June 11, 2026)
- · Trustpilot Substack reviews (1.3/5, read live June 11, 2026)
Who Should Pick Which
If your business is paywalled posts:
Substack, without much debate. Mailchimp has no native paywall, so moving there means rebuilding your subscription model on a third-party checkout and losing every paying subscriber to a re-subscribe campaign. The 10 percent is a real cost, but it buys a working paywall, the checkout, and a discovery network. If the cut is what stings, the better move is a platform that keeps subscriptions and charges a flat fee, not Mailchimp.
Start free on Substack →If you monetize through products, services or sponsors and want automation:
Mailchimp earns its place. You stop handing over 10 percent of revenue, you gain Customer Journeys, segmentation, A/B testing and 300+ integrations, and the contact-based price stays reasonable on a tight, engaged list. Keep the list lean (archive dead contacts on a schedule) and document your automations off-platform in case moderation ever touches the account.
Try Mailchimp (free plan) →If you have a big free list and little revenue yet:
Substack, clearly. Mailchimp would bill you for every dormant contact while you earn nothing, and Substack charges $0 on a free list. Build the audience first, then re-run the math once you actually monetize. Export your CSV monthly from day one whichever way you go.
If you want a stable platform and dislike both trade-offs:
Reasonable. Mailchimp's per-contact billing and Intuit's pullback, and Substack's missing tools and 2025 breach, are both real. A newsletter-native platform that keeps the subscription model, ships automation, and bills a flat fee may fit better than either; see our Substack vs Beehiiv comparison instead.
Looking wider? See the full Substack alternatives 2026 guide for newsletter-native options that keep the paywall Mailchimp lacks.
Join the Discussion
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