# MailerLite Integrations: Strong for Creators, Weakest Where Stores Grow

> MailerLite integrations measured: 100+ connections, a public API, webhooks and an MCP server, with the vendor's Shopify app at 2.4 and WordPress plugin at 3.0 against 4.7 for its phone app.

_Source: https://professionalstoolkit.com/articles/mailerlite-integrations — The Professional's Toolkit · updated 2026-10-09_

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MailerLite lists more than 100 integrations on its pricing page [2]. That is a smaller number
than some rivals claim, and a more verifiable one, because the platform also publishes the
developer surface behind it: a public API, webhooks and an MCP server for AI assistants. This page
covers what connects, how well, and what the integrations cost or limit.

The headline finding is uneven quality. MailerLite's own phone app scores 4.7 from 1,106 ratings on
the App Store [13]. Its own Shopify app scores 2.4 from 27 [15], and its own WordPress
plugin 3.0 from 40 [14]. The integrations a business depends on most for list growth are the
vendor's weakest surfaces.

## What MailerLite connects to

The vendor's pages name these connections [9]:

- **ChatGPT** and **Claude**, through the MCP server.
- **Shopify** and **WooCommerce**, for store customers, products and purchase data.
- **Stripe**, for selling products, bookings and subscriptions.
- **Mailchimp**, through an importer for subscribers, fields and segments.
- **Zapier**, which connects MailerLite to more than 5,000 other apps.
- **WordPress**, for signup forms on a WordPress site.
- **Canva**, for designs in campaigns, blogs and websites.

The pricing page's comparison table adds Facebook Custom Audiences, webhooks, the MailerLite API
and the MCP server [2]. Transactional email is a separate product, MailerSend, sold separately
on every plan.

That covers the common needs of a creator or a small online business: a store, a payment processor,
a website, an AI assistant and a bridge to everything else.



> 💡 **undefined:** Check the developer name before reading a marketplace listing's reviews.

## Integrations by plan

Most integrations are available on every plan, including Free. The limits are on the developer
surface.

| | Free | Comfort | Power |
|---|---|---|---|
| 100+ integrations | yes | yes | yes |
| MailerLite API | limited | yes | yes |
| MCP server | limited | yes | yes |
| Webhooks | limited | yes | yes |
| Shopify, WooCommerce, Stripe | yes | yes | yes |

The key limit is sending. "Email sending via the API and MCP server is available on paid plans. On
Free, API and MCP access is limited and doesn't include sending." [2] So a website that triggers
an email through the API, or an assistant that sends a campaign through MCP, needs a paid plan.

On the free plan over 250 subscribers, integrations behave differently again. Connected e-commerce
integrations keep syncing existing subscribers "but they will not add newly opted-in customers to
your email list", and subscribers from the API or other integrations are not added [5]. To a
store owner that looks like a broken integration. It is the plan limit.

## Shopify: the weakest surface

MailerLite's own Shopify app, "MailerLite Email Automation", scores 2.4 from 27 reviews [15].
The distribution is 7 five-star, 3 three-star, 2 two-star and 15 one-star. More than half of the
reviewers gave one star.

The complaints are specific. One merchant writes that "The tags are not working properly.
Automations not sending due to tags not working." [15] Another describes "many glitches and server
errors when trying to set up the pop-ups and automations" [15]. A third describes a discount that
support "refused to honor it as it doesn't work with Shopify billing them" [15].

That last point is structural. Accounts that started through the Shopify integration can pay through
Shopify [8], and the vendor's own GOLITE50 sale excluded "Users who installed the MailerLite
Shopify app through the Shopify App Store" [18]. A Shopify-billed account sits slightly outside
MailerLite's normal billing, and promotions may not reach it.

For comparison, Klaviyo's Shopify app scores 4.7 from 3,362 reviews in our Klaviyo measurement. For a
store whose revenue depends on abandoned-cart and post-purchase flows, that difference matters more
than any price gap.



> 💡 **undefined:** On WordPress, consider the embed code instead of the plugin.

## The other Shopify listing

Search the Shopify App Store for MailerLite and you may find a second listing, at the address ending
in mailerlite-1, titled "MailerLite Email Marketing". It is not the vendor's.

The listing states: "This app is not currently available on the Shopify App Store. If you have
support questions, contact Combidesk directly." [15] Combidesk is a third-party integration
provider. Its listing is withdrawn.

We mention it because it is easy to mistake for the official app, and because a review or rating
quoted from it would be attributed to the wrong company. When you evaluate the Shopify integration,
use "MailerLite Email Automation", developed by MailerLite, launched in June 2022.

The same caution applies to any marketplace: check the developer name before reading reviews.

## WordPress: forms on your site

The official plugin, "MailerLite – Signup forms (official)", connects MailerLite forms to a WordPress
site. It scores 3.0 from 40 reviews on WordPress.org [14]. The distribution is 14 five-star, 4
four-star, 3 three-star, 4 two-star and 15 one-star, a mean of 2.95.

It is bimodal, like MailerLite's Trustpilot reviews: people either have no trouble or have a lot.

For most sites there is a simpler route. MailerLite's embedded forms come with an embed code you can
paste into a WordPress block, a theme widget or a page builder. That avoids the plugin entirely, at
the cost of managing the form in MailerLite rather than in WordPress.

Use the plugin if you want forms managed from the WordPress dashboard. Use the embed code if you want
fewer moving parts. Either way, test on a staging site first and confirm that new subscribers land in
the right group, because that group is what starts your welcome automation.



> 💡 **undefined:** Let MailerLite own consent and unsubscribes in every sync.

## Stripe: selling through MailerLite

Stripe is the integration that turns MailerLite into a shop. It powers digital products, bookings,
paid newsletters and recurring subscriptions, and the paid newsletter page says it handles payments
"from one-time purchases to weekly, yearly or custom subscriptions" in more than 135 currencies and
payment methods [17].

MailerLite takes no commission on those sales; the features page puts it as selling "without paying
us a commission" [10]. Stripe's own processing fees apply.

What the plans limit is the number of active products or bookings: one on Free, five on Comfort,
unlimited on Power [3]. Over the limit, existing products keep selling but you cannot create,
activate or edit products until you are back under it [4].

For a creator, this is the most valuable integration MailerLite has. The buyer, the purchase and the
follow-up automation all live in one place, and nothing is lost between a store and an email tool.

## Zapier and the long tail

Zapier is how MailerLite reaches the thousands of apps it does not integrate with directly. The
vendor says the connection reaches "5,000+ apps" [9].

Typical uses:

- A new row in a spreadsheet adds a subscriber to a group.
- A new customer in an accounting or CRM tool adds them to a *customers* group.
- A form on another platform, such as a webinar tool, adds registrants.
- A new MailerLite subscriber creates a contact in a CRM.

Zapier is priced separately and counts tasks, so a busy integration can cost more in Zapier than in
MailerLite. For high-volume syncs, the API or webhooks are usually cheaper.

One rule for every Zapier flow into MailerLite: send only people who opted in. Zapier makes it easy to
pour contacts from any tool into a list, and the account review that follows is MailerLite's problem
to raise and yours to solve.



> ⚠ **undefined:** Over 250 subscribers on Free, integrations stop adding new subscribers.

## The API and webhooks

MailerLite publishes a developer API and webhooks, which is the foundation for any custom
integration. Both are limited on Free, and sending through the API requires a paid plan [2].

The API covers what you would expect of an email platform: subscribers, groups, fields, campaigns,
automations and forms. Webhooks notify another system when something happens in MailerLite, such as
a new subscriber or an unsubscribe.

For a small business without a developer, the API matters indirectly. It is why many other tools can
offer a MailerLite integration from their side, even where MailerLite does not list one.

For a business with a developer, the main design decision is which system owns consent. Let
MailerLite own subscription status and unsubscribes, and have other systems read it. Two systems that
both believe they own the unsubscribe list will, sooner or later, email someone who asked them not
to.

## AI assistants through MCP

MailerLite publishes an MCP server, so AI assistants such as Claude and ChatGPT can work directly in
an account. The vendor's comparison page shows example requests: "Turn the blog post below into a 100
word email summary." "Show me everything about subscriber jane@example.com, including recent
activity." "Find where subscribers are dropping off in my onboarding automation." [9]

On Free the MCP connection is limited and cannot send. On paid plans it can.

The pricing page describes Power as "Best for frequent senders, teams and AI agents." [2] That
makes sense: an assistant that sends often will hit Comfort's sending cap faster than a person.

The terms reserve the right to "modify, suspend, or terminate AI-Powered Features, including access to
the MCP or specific AI Agent integrations, without liability" [8]. Treat MCP as a convenience, not
as infrastructure your business cannot run without.



> ⚠ **undefined:** A withdrawn third-party Shopify listing also uses the MailerLite name.

## Transactional email is a separate product

Password resets, receipts and order confirmations are transactional email, and MailerLite does not
send them from the marketing product. The pricing page lists transactional emails as "Try MailerSend"
on every plan [2].

MailerSend is the same company's transactional service, with its own pricing. For a store, that means
two products: MailerLite for campaigns and automations, and either MailerSend or the store's own
system for transactional messages.

Shopify and WooCommerce send their own order emails, so most small stores do not need MailerSend. A
custom application or a membership site usually does.

Keep the two apart. Sending transactional email through a marketing account mixes two kinds of
consent and two kinds of deliverability, which is why most platforms in this category separate them.

## The ratings at a glance

| Surface | Developer | Rating | Reviews | One-star share |
|---|---|---|---|---|
| MailerLite Manager, App Store | MailerLite, Inc. | 4.7 | 1,106 | not published |
| Signup forms plugin, WordPress.org | MailerLite | 3.0 | 40 | 15 of 40 |
| Email Automation, Shopify App Store | MailerLite | 2.4 | 27 | 15 of 27 |
| Trustpilot, the company | | 4.1 | 3,362 | 23 of our 100 |

The phone app is a narrow surface, checking campaigns and subscribers on the move, and it scores
highest. The two integrations that feed a list from a website or a store score lowest, and both
have more one-star reviews than any other single rating. The company itself sits in between.

Read the table as a map of where problems concentrate, not as a verdict on the platform. A
newsletter that grows through MailerLite's own forms never touches the two weak surfaces.

## Testing an integration before you rely on it

Before an integration carries your list, test it end to end.

1. **Use a test environment.** A development store on Shopify, a staging site on WordPress.
2. **Create a test subscriber** with an address you control, through the integration, not by hand.
3. **Check the group.** Confirm the subscriber lands in the group that starts your automation.
4. **Check the automation.** Confirm the welcome or purchase sequence starts and every email
   arrives.
5. **Check unsubscribes.** Unsubscribe the test address and confirm the integration does not
   re-add it on the next sync.
6. **Check the purchase data,** for stores: that the order appears on the subscriber's profile.

Then check the plan limit. On Free, over 250 subscribers, integrations stop adding new subscribers
while existing ones keep syncing [5]. Test what your integration does near that line, because
the failure is silent.

## What happens to integrations when you downgrade or cancel

Integrations do not switch off when a plan changes, but what they can do does.

Moving from a paid plan to Free limits the API, webhooks and the MCP server, and removes sending
through them [2]. A website that triggers emails through the API stops sending them.

Over Free's limits, connected stores keep syncing existing subscribers but stop adding new ones
[5]. Custom domains are removed on cancellation, and must be disconnected from landing pages
before a cancellation can start [7]. Pages fall back to the default MailerLite address.

So before a downgrade, list every integration that sends, every page on a custom domain and every
store connection, and decide what replaces each one.

## How the integration picture compares

On the claim alone, MailerLite's 100+ integrations look modest beside Constant Contact's 300+. On
verifiability, MailerLite is stronger. Its developer surface is published, its named integrations
have their own pages, and its MCP server is documented. In our Constant Contact measurement, the
integrations directory refused every automated reader.

On quality, the comparison depends on which integration you need. For an AI assistant, MailerLite is
ahead of most rivals in our set, with a published MCP server. For Stripe-based selling, it is strong
and commission-free. For Shopify, it is behind Klaviyo by a wide margin. For WordPress, it is average
at best.

We score MailerLite 3.5 out of 5 on integrations. The score reflects a real developer surface and
good coverage of creator tools, held down by the ratings of the two integrations that drive list
growth for stores and websites.



## FAQ

**Does MailerLite integrate with Shopify?**

Yes, through its own app, MailerLite Email Automation, which scores 2.4 from 27 reviews. Test it on a development store and read recent reviews first.

**Does MailerLite have an API?**

Yes, plus webhooks and an MCP server. On the free plan they are limited and cannot send email.

**Can MailerLite send transactional emails?**

Not from the marketing product. The vendor points to MailerSend, its separate transactional email service.

## Choosing the right integration setup

A short guide by type of business.

**A newsletter or creator:** MailerLite forms on your site, Stripe for paid products, and the MCP
connection if you draft with an assistant. You may need nothing else.

**A WordPress site:** embedded forms rather than the plugin, unless you need forms managed from
WordPress. Test on staging.

**A Shopify store:** test the official app on a development store first, and read its most recent
reviews. If abandoned-cart revenue is central, compare Klaviyo before committing.

**A business with a CRM:** Zapier for low volume, the API for high volume, with MailerLite owning
consent.

**A custom application:** the API for marketing, and MailerSend or your own system for transactional
email.

Whatever the setup, check what each integration does on the free plan above 250 subscribers. That is
where most *broken integration* reports begin.




## Sources

[1] MailerLite vendor pricing page — https://www.mailerlite.com/pricing (2026-10)
[2] MailerLite vendor documentation on plans and billing — https://www.mailerlite.com/help/plan-and-billing (2026-10)
[3] MailerLite vendor notice on the move to Comfort and Power plans — https://www.mailerlite.com/help/paid-plans-update-faq (2026-10)
[4] MailerLite vendor notice on the Free plan update — https://www.mailerlite.com/help/free-plan-update-faq (2026-10)
[5] MailerLite vendor refund policy — https://www.mailerlite.com/help/mailerlite-refund-policy (2026-10)
[6] MailerLite vendor documentation on cancelling a subscription — https://www.mailerlite.com/help/cancel-my-subscription (2026-10)
[7] MailerLite Terms of Use — https://www.mailerlite.com/legal/terms-of-service (2026-10)
[8] MailerLite vendor comparison page against Mailchimp — https://www.mailerlite.com/mailchimp-alternative (2026-10)
[9] MailerLite vendor features page — https://www.mailerlite.com/features (2026-10)
[10] MailerLite vendor documentation on deleting an account — https://www.mailerlite.com/help/how-to-delete-my-account (2026-10)
[11] Trustpilot aggregate score and review corpus for MailerLite — https://www.trustpilot.com/review/mailerlite.com?languages=all (2026-10)
[12] App Store listing for MailerLite Manager, published by MailerLite, Inc. — https://apps.apple.com/us/app/mailerlite-manager/id1586139546 (2026-10)
[13] WordPress.org listing for the official MailerLite signup forms plugin — https://wordpress.org/plugins/official-mailerlite-sign-up-forms/ (2026-10)
[14] MailerLite's own Shopify App Store listing — https://apps.shopify.com/mailerlite-email-automation (2026-10)
[15] MailerLite public status page — https://status.mailerlite.com/ (2026-10)
[16] MailerLite vendor page on paid newsletter subscriptions — https://www.mailerlite.com/features/paid-newsletter-subscriptions (2026-10)
[17] MailerLite GOLITE50 sale terms — https://www.mailerlite.com/legal/golite50-sale-terms (2026-10)
[18] MailerLite vendor Free plan page — https://www.mailerlite.com/free-plan (2026-10)
[19] Mailchimp vendor pricing page — https://mailchimp.com/pricing/ (2026-09)
[20] Mailchimp vendor documentation on pricing plans — https://mailchimp.com/en/help/about-mailchimp-pricing-plans/ (2026-09)
[21] Mailchimp vendor plan comparison page — https://mailchimp.com/en/pricing/marketing/compare-plans/ (2026-09)
[22] Trustpilot aggregate score for Mailchimp — https://www.trustpilot.com/review/mailchimp.com (2026-09)
[23] Mailchimp vendor documentation on contacts — https://mailchimp.com/en/help/about-your-contacts/ (2026-09)