Nitrosend vs Mailjet.

Built for email, agent-native, automation included, and a published price at scale.

TL;DR

Mailjet is an email API and a marketing platform on one account, run out of EU data centers, and priced on the emails you send once you reach Essential, where the contact cap comes off. Below that the list is metered: 1,000 contacts on Free and 2,000 on Starter. If your compliance review starts with where the data sits, that's a real answer and not a marketing line.

Nitrosend specializes in email. What we add is the operating surface: every capability is an API endpoint and an MCP tool before it's a screen, marketing automation is included from the entry paid plan, and BYO sending keys on Pro and above keep the transport where you want it. Mailjet ships an official MCP server of its own. The difference is what each one reaches: theirs is read-only by default, so write access means a developer extending it.

Buyers comparing on that reach usually look at Mailrelay, Mailshake, and MailSlurp in the same pass, because each exposes a very different amount of the product to code.

Pricing math

What you actually pay.

Both published ladders, monthly billing, in USD, before Mailjet's 10% annual discount. Each of Mailjet's published rungs bundles a plan with a send volume, so features and size move together: Essential and Premium both carry 15,000 emails a month, and only Premium carries automation.

Scenario	Nitrosend	Mailjet
Free	8,000 emails to start, then 500/mo forever. Unlimited contacts, 1 seat, full MCP, API, and CLI	6,000 emails/mo, capped at 200 a day. 1,000 contacts and one user, so one campaign to a full free list can't go out in a day
Entry paid tier	$20 Pro: 20,000 emails, 3 seats, BYO sending and AI keys	$9 Starter: 8,000 emails, 2,000 contacts, one user, and no segmentation
The automation rung	$20 Pro: campaigns, flows, and segments on the same plan	$27 Premium: 15,000 emails. Automation and A/B testing don't exist on Essential at $17
500,000+ emails/mo	$300 Enterprise: 500K to 4M+ emails at a published price, with SSO and SAML	Custom, quote only. A dedicated IP is included from the 100,000 rung

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

Migration

How to switch (or run both).

Nothing here is big-bang. Both platforms can authenticate against the same domain, so Mailjet keeps sending while you move, and the overlap can run as long as you want it to.

Add and verify your sending domain in Nitrosend. The SPF and DKIM records sit alongside Mailjet's, so both platforms send from the same domain for as long as the overlap lasts, and nothing has to be cut over on a date.
Export your contacts from Mailjet with their contact properties and import them with nitro_import_contacts. Mailjet contact properties map onto custom fields and Mailjet contact lists map onto lists, so the shape survives the trip.
Start with one low-stakes message type, a receipt or a password reset, sent with nitro_send_message. Watch it for a week, then let a campaign follow it once the delivery data is boring.
Rebuild your automations as flows with nitro_compose_flow. Bring the template source rather than a screenshot: Mailjet's builder is MJML underneath, MJML is open source, and the markup travels.
Decide what carries your reputation. BYO sending keys on Pro and above route mail through Amazon SES, Resend, Postmark, Mailgun, or SendGrid, and Mailjet's own pool isn't one of them, so a sender leaving that 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 Mailjet does well.

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

EU data centers stated as a product position on the email API page, not as a footnote in a trust center.
GDPR, ISO 27001, and SOC 2 named plainly on that same page, rather than behind a sales call.
A Parse API that receives inbound mail and parses it into structured fields at a webhook of your choice.
Real-time collaborative editing with comments and automatic draft saves, so two people can build one email together.
Lockable saved sections, which is brand governance a marketer can't break by accident.
MJML underneath the drag-and-drop builder, so the output is responsive by construction and the source is portable.
An official MCP server, Apache 2.0 licensed, covering the contact, campaign, segmentation, statistics, and workflow APIs.
Unlimited contacts from Essential upward, so a large list mailed occasionally doesn't move the bill on the paid ladder.
Official SDKs in PHP, Ruby, Python, C#, Java, and Node, and real-time event webhooks for delivery, opens, clicks, and bounces.

What Nitrosend adds

Where we think we're better.

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.
Mailjet's server is read-only by default, so the agent surface there reads the account rather than running it.
Enabling writes on Mailjet's MCP server means a developer extending it, so write access is something you build and maintain in-house.
The difference shows at the edges: deliverability, billing, tests, and approvals are tools here, and they're the four that usually stop an automation dead.
Marketing automation and flows are included from the entry paid plan, not held back for a higher rung.
A published price from 500,000 to over 4,000,000 emails a month, where the ladder usually turns into a sales call.
Unlimited contacts on every plan, including Free, so a list that grows without being mailed never moves the bill.
Three seats on the entry paid plan, so a second person doesn't need a plan upgrade to log in.
BYO sending keys on Pro and above route your mail through Amazon SES, Resend, Postmark, Mailgun, or SendGrid, on the domain you already authenticated.
BYO keys make the move reversible, where 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 Mailjet if

Your compliance review starts with where the data sits, and EU data centers with GDPR, ISO 27001, and SOC 2 named on the product page are the shortest way to end that conversation. A product that receives and parses inbound mail points the same way, and so does a marketing team that builds emails together in one editor and needs brand blocks nobody can break by accident. None of those are close calls.

Pick Nitrosend if

Email is the channel your program runs on, campaigns and transactional sends share one set of contacts, and you want the platform to answer to an agent end to end, including the billing, testing, and approval steps that usually send someone back to a dashboard. It's the right call too when automation shouldn't be the reason you move up a plan, and when you want a price you can read for yourself above half a million sends a month.

Mailjet vs Nitrosend - common questions.

Can Nitrosend replace Mailjet for both marketing and transactional email?

For outbound, yes. Campaigns, flows, segments, templates, contacts, and transactional sending are all here on one account, and transactional isn't a separate product with a separate bill. What it can't replace is inbound: Nitrosend is sender-side, so anything using Mailjet's Parse API to receive or route replies stays where it is.

Does Nitrosend store data in the EU?

No. Nitrosend doesn't offer EU data residency, so if that's a requirement rather than a preference, Mailjet runs EU data centers and is the answer.

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

Order of construction, and how far each one gets. Mailjet's server reads the account: an agent can pull campaign statistics or list a segment, and anything that changes something waits on a developer to enable it. We built it the other way round, so an agent can take a send from draft to delivered on its own, building the segment, running the test, reading the deliverability signals, collecting the approval, and settling the bill without a person opening a screen in between.

Can I keep sending through Mailjet while I move?

Yes, and the question worth asking is how long to leave it running. Plan for at least one full billing cycle: an automation that only fires monthly hasn't really been tested until it has fired once on the new platform, and a quarterly send wants longer still. Close the Mailjet account when a cycle has passed with nothing routed back to it, not when the last import finishes. A longer overlap costs you two subscriptions and nothing else.

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.