Nitrosend vs MailerLite.

Unlimited contacts, transactional included, agent-native, priced on sending.

TL;DR

MailerLite is subscriber-priced email marketing for small senders. A website builder, landing pages, signup forms, and an email verifier come with the subscription rather than as add-ons, and addresses that unsubscribe or bounce drop out of the billed count. If the list is the thing you're managing, that model is the argument, and it's a good one.

Nitrosend specializes in email and prices on what you send, so a list you rarely mail never moves the bill, however large it is. Campaigns and transactional mail arrive on one subscription, where MailerLite bills transactional separately through MailerSend. Nothing here starts life as a screen: the endpoint and the MCP tool come first. MailerLite's own MCP server is real, and it wraps the objects the dashboard already had, so it reaches what has a screen. Ours has no screen-shaped edge, which is why domains, DNS authentication, deliverability, billing, and approvals are reachable for the same reason campaigns are.

The practical version of that is one account carrying campaigns and transactional email together, reachable through a single email API, where MailerLite sends you to MailerSend for the second half.

Pricing math

What you actually pay.

The two ladders are priced on different things: MailerLite bills on active subscribers, Nitrosend bills on emails sent. So the rows start at the free tiers and climb by scale, naming a list size, a send volume, or both, and the MailerLite column is the entry price for that subscriber tier on monthly billing, before MailerLite's annual discount.

Scenario	Nitrosend	MailerLite
Free	8,000 emails to start, then 500/mo forever. Unlimited contacts, 1 seat, full MCP, API, and CLI	250 subscribers, 2,500 emails/mo, 2 seats. API and MCP access is limited and doesn't include sending
500 contacts, 20,000 emails/mo	$20 Pro: 20,000 emails, 3 seats, BYO sending and AI keys	$12 Comfort, but that tier caps sending at 5,000 emails a month, ten times its 500-subscriber ceiling. Reaching 20,000 means a higher subscriber rung or Power
5,000 contacts, 50,000 emails/mo	$100 Ultra: 125,000 emails, 5 brands, 10 seats. Contacts never enter the price	$49 Comfort, or $69 Power to lift the send cap under fair use and open the dedicated IP option
25,000 contacts	$100 Ultra still covers it. The price tracks sending, not list size	$179 Comfort. Enterprise is quote-only, positioned above 200,000 subscribers

Prices accurate as of August 2026. Check vendor sites for current rates.

Migration

How to switch (or run both).

MailerLite keeps sending while you move, and the site, landing pages, and forms you built there stay where they are until you're ready.

Add and verify your sending domain in Nitrosend. DKIM and SPF records sit alongside MailerLite's, so both platforms send from the same domain for as long as the overlap lasts.
Export your subscribers, and set the columns first. MailerLite's export carries only the fields visible on the subscriber overview at the moment you run it, so add Groups and every custom field as columns before you generate the file. Import with nitro_import_contacts: groups map onto lists and custom fields onto custom fields.
Take engagement history through the API rather than the CSV. The subscriber object carries subscribed_at, opens_count, and clicks_count, and that history is what a segment on the other side gets built from.
Rebuild automations as flows with nitro_compose_flow, starting with one low-stakes message and watching it for a week before a campaign follows it. If you also run MailerSend for transactional, this is the step where that second bill stops.
Decide what carries your reputation. BYO sending keys on Pro and above route mail through Amazon SES, Resend, Postmark, Mailgun, or SendGrid. MailerLite's own pool isn't one of them, so a sender leaving its shared pool is warming a new path whichever platform it lands on. What travels with you is the domain and its authentication history.

Honest credit

What MailerLite does well.

Picking a tool is about fit. Here's what MailerLite is genuinely good at.

Unsubscribed and bounced addresses stop counting toward the bill, which is the opposite of how most contact-priced platforms behave.
Power lifts the monthly send cap entirely under fair use rather than raising it a rung.
A website builder, landing pages, signup forms, and an offline subscribe app come with the subscription rather than as add-ons.
List cleaning is part of the product: an email verifier is a listed feature, not a separate purchase.
A free tier a real beginner can start on: 250 subscribers, 2,500 emails a month, two seats.
An official MCP server from MailerLite Labs, running to roughly seventy tools across subscribers, campaigns, groups, segments, fields, forms, automations, templates, ecommerce, and webhooks.
That server writes as well as it reads, so an agent can create a campaign, schedule it, or build an automation from scratch.
It carries a testing surface too, with dry_run_automation and send_test_automation, which most agent integrations don't expose at all.

What Nitrosend adds

Where we think we're better.

Unlimited contacts on every plan, including Free, so a list that grows without being mailed never moves the bill.
We price on the emails you send, so a large list mailed rarely costs what it costs to mail rather than what it costs to hold.
Comfort meters sending at ten times your subscriber tier each month, so the cheap rung has a volume ceiling the headline price doesn't describe.
Transactional and campaigns are one product on one bill, where MailerLite's transactional product is MailerSend and a separate subscription.
Sending from the API and the MCP server works on our free plan, and on MailerLite that needs a paid one.
MCP-first is an architecture, not an integration: every capability at Nitrosend is an API endpoint and an MCP tool before it's a screen.
Sending domains and their DNS authentication, deliverability, billing, and approvals aren't on MailerLite's published tool list.
Domain setup and the approval step are where an automation usually stops dead and somebody goes back to a dashboard, and an agent can work through both of them here.
BYO sending keys on Pro and above route your mail through Amazon SES, Resend, Postmark, Mailgun, or SendGrid, on the domain and IP you already warmed.
BYO keys make the move reversible: switching platforms otherwise means switching sending reputation on the same day, when the two failures look identical.

Use case fit

When to pick which.

Pick MailerLite if

Your list is the thing you're managing and the sending is incidental. Wanting a website, landing pages, forms, and an email verifier inside one subscription rather than four points the same way. So does a list that churns, because unsubscribed and bounced addresses leave the bill. Being under 250 subscribers, where free forever is the whole requirement, is reason enough on its own. If you don't send transactional email at all, the half we'd add isn't doing anything for you.

Pick Nitrosend if

Email is the channel your program runs on, and your list is much larger than your send volume. You're tired of paying for addresses you don't mail, and you'd rather transactional and campaigns arrived on one bill. It's the right call too when you want the platform to answer to an agent end to end, including domain authentication, deliverability, billing, and the approval step, or when you want to send from the API on a free plan while you evaluate.

Where else to look

Teams pricing MailerLite usually open the MailerSend comparison next, since it is the transactional half of the same family, and read the Mailgun writeup or the Mailjet breakdown if the sending infrastructure is the real decision. The full provider comparison index covers the rest.

MailerLite vs Nitrosend - common questions.

Can Nitrosend replace MailerLite?

For the email half, yes, and the transactional half comes with it rather than needing MailerSend alongside. Campaigns, flows, segments, templates, contacts, and transactional sending are all one product on one bill. What doesn't come across is the website builder, the landing pages, and the signup forms, so a team using MailerLite as its site as well as its email platform is splitting two jobs that used to be one.

Is Nitrosend cheaper than MailerLite?

It depends which axis you're on. At small list sizes MailerLite is cheaper on paper: $12 Comfort at 500 subscribers against $20 Pro here. The comparison inverts as the list grows without the sending growing, because $179 a month at 25,000 subscribers buys list capacity, and $100 Ultra buys 125,000 emails regardless of how many addresses you hold. Both ladders move, so read them side by side at your own numbers.

MailerLite has an MCP server too. What's actually different?

Where each one starts. MailerLite Labs publishes roughly seventy tools with real write access, covering subscribers, campaigns, groups, segments, forms, automations, and templates, and that's the marketing product done properly. Those tools were modelled on a dashboard that already existed, so the tool list ends where the interface does. Nitrosend was built the other way round, with the API and the agent tooling written before any interface exists, so there's no boundary where an agent runs out of product. Setting up a sending domain, chasing a deliverability problem, or clearing an approval is the sort of step that normally sends somebody back to a browser tab, and here it doesn't.

Can I move without losing my groups and custom fields?

Yes, as long as you fix the export before you run it. MailerLite builds the CSV from whichever columns your subscriber overview is displaying at that moment, so anything you haven't put on screen, Groups included, simply won't be in the file. Add Groups and your custom fields to the view, run the export, and each group arrives as a column that becomes a list here. Open and click history isn't in the CSV at all. It sits on the subscriber object in the API, and that's what you'd rebuild segments from.

Start with the free tier.

8,000 emails to start, then 500 a month, unlimited contacts, full MCP, API and CLI access. No credit card.