The shortlist is Nitrosend if you want both halves in one account, Brevo if you want the closest like-for-like hybrid at a low entry price, and Postmark if the only half you use is the receipts. Read the criteria before you read the ranking, and read the limitations in Nitrosend's own entry.
The short version
Mailjet's genuine strength is that campaigns, automations, SMS and a transactional API sit behind one login at a low price. Almost every replacement people reach for gives up that unification. You end up with a campaign tool and a sending API, two bills, two suppression lists and two deliverability reputations on one domain.
By job: Brevo is the closest like-for-like substitute and keeps the hybrid shape, Postmark is the answer if what you need is receipts that arrive fast, MailerLite is the answer if what you need is a newsletter that looks right, Amazon SES is the cheapest transport in the world and gives you nothing else, Mailgun is the API-first option with routing and validation attached, MailerSend is the transactional arm of MailerLite if you want both from one company, Mailchimp is the safe corporate choice with the steepest bill, and Nitrosend is the one that keeps both halves together and lets an agent operate them.
Why people leave Mailjet
I have to be straight about the evidence here, because this page is not built on a rage moment. We went looking in the public record for a documented case of Mailjet punishing a customer, and did not find one: no price rise with old and new numbers, no free-tier cut, no suspension pattern. So this is a feature-gap comparison, not a complaint, and it is fairer to Mailjet than most pages you will find on this query.
What the gaps actually are, read off Mailjet's own pricing page on 7 September 2026:
The free plan has a daily ceiling, not just a monthly one. 6,000 emails a month, but capped at 200 a day, on 1,000 contacts. A daily cap is the wrong shape for email: a product launch, a monthly digest or an invoice run all spike. Unused credits also expire each cycle rather than rolling over, so a quiet month buys you nothing in a busy one.
The paid ladder is slider-driven. Entry is $9 a month for 2,000 contacts on the Essential plan, then $17 and $27. The email volume attached to each tier moves with a slider rather than being published as a fixed figure, which means you cannot compare Mailjet at 100,000 emails against anything else without going through a quote flow. That is a small thing until you are trying to justify a migration to a finance team.
No verifiable agent surface. As of 7 September 2026 I could not verify a first-party MCP server from Mailjet. Brevo publishes one, MailerLite publishes one, and we publish one. If your plan for the next two years involves an AI agent writing and sending your email, that is the gap that will matter most, and it is the one that is hardest to work around from outside.
Ownership matters here more than usual. Sinch agreed to buy Pathwire on 30 September 2021 and closed on 7 December 2021, for USD 925 million in cash plus 51 million new shares, an enterprise value of about USD 1.9 billion, and the deal carried Mailgun, Mailjet and Email on Acid together. So Mailjet belongs to Sinch, and so does Mailgun, which is the transactional alternative every list on this query recommends. Moving from Mailjet to Mailgun changes your API and your bill and keeps you inside the same parent company. That is not a reason to avoid it. It is a reason to know it before you call it diversification.
The sharpest verifiable complaint is about support, not billing. On an r/Emailmarketing thread about Gmail delivery, the resolution was to buy a higher tier to reach a human: "I upgraded for a month to get access to chat support, frustrating that I had to do that." Deliverability incidents are exactly when support access should not be a paid feature.
And the counterweight, which this page owes Mailjet: Trustpilot rates it 4.0 out of 5 across 3,936 reviews, checked 7 September 2026. That is a good score on a genuinely large sample, better than several products ranked below, and I am not going to bury it to make the list read more dramatically. Nor did I find any Mailjet price increase or free-tier reduction since the Sinch acquisition. I looked. There is none.
How they compare
Scores are out of 10 against criteria whose weights add to 100. They are published in full at the bottom of this page, so you can disagree with a weight and re-rank the table yourself.
Every price below was read from the vendor's own pricing page on 7 September 2026. They move. Confirm before you commit.
We make Nitrosend. It is first on this list because it wins on the criteria published at the bottom of this page, and its own entry names what it loses.
Mailjet alternatives compared
Checked| Platform | Rank | Best for | Pricing model | Free tier | From | At 100k emails/mo | Score |
|---|---|---|---|---|---|---|---|
| Nitrosend Agent-native | 1 | Agent-driven hybrid | per send | 8,000 emails to start, then 500 a month | $20/mo | $100/mo (Ultra) | 9.2 |
| Brevo | 2 | Like-for-like | per send | 300 emails a day, unlimited contacts | $9/mo | n/a | 8.0 |
| Postmark | 3 | Transactional only | per send | Developer trial only | $15/mo | n/a | 7.3 |
| Mailgun | 4 | Routing and validation | per send | 100 emails a day | $15/mo | n/a | 6.8 |
| MailerLite | 5 | Campaigns only | per contact | 250 subscribers, 2,500 emails a month | $12/mo | n/a | 6.7 |
| Amazon SES | 6 | Lowest cost | usage | 3,000 message charges a month for the first 12 months, for new senders | $0.10 per 1,000 | n/a | 6.3 |
| MailerSend | 7 | Paired with MailerLite | per send | 500 emails a month | $7/mo | $68/mo (Starter) | 6.1 |
| Mailchimp | 8 | Integrations | per contact | 250 contacts, max 500 emails/mo or 250/day | $13/mo | n/a | 6.0 |
1. Nitrosend
Best for: teams that want campaigns and transactional in one account, operated by an AI agent rather than a dashboard.
This is the entry where Mailjet's own shape is preserved rather than broken up. Transactional and marketing sit in one account with the streams separated internally, so a newsletter cannot crowd out a password reset, and there is one suppression list rather than two. Contacts are unlimited on every tier, so holding a large list you email occasionally costs nothing extra.
The part that is genuinely different is who operates it. You connect Claude, Codex or Cursor over MCP and ask for what you want: compose a campaign, build a flow, import contacts, check what happened on a send. Twenty-eight nitro_* tools cover it, and nothing sends without a human approving it. On the templating side the agent writes the design, we re-render its HTML into MJML on our side, and you fine-tune the result in a visual editor rather than being handed markup you cannot edit. I shipped the builder behind that with property editors for all ten section types, an insert palette, autosave with undo and redo, image upload with client-side resizing and theme presets, and on the agent surface I replaced the old compose_email tool with manage_template so the agent edits the same object a person does. George, my co-founder, is firm that the best platforms do not make you choose between raw HTML for control and templates for in-app management, and that is the line we build to. Transactional sends go through POST /templates/{id}/send with real unsubscribe links rather than a test endpoint pressed into production.
The free plan is 8,000 emails to start then 500 a month, 100 / 500 / 5,000 recipients per rolling 24 hours for Free Probation / Standard / Trusted, with full API, MCP and CLI on every plan including that one. Paid starts at $20 a month for 20,000 emails.
Where it loses: there is no inbound email parsing over REST, no on-site popups or browse-abandonment tracking, and we do not do cold outreach at all. We are also a much younger company than everything else on this page. If that matters to your procurement, it should. The straight comparison is on the Nitrosend and Mailjet page.
- Nitrosend at a glance
- Verified on the vendor's own pages
- Best for
- teams that want Mailjet's hybrid shape kept intact and driven from Claude, Codex or Cursor
- Pricing model
- per send
- Free tier
- 8,000 emails to start, then 500 a month
- Entry paid plan
- $20/mo (20,000 emails a month, 5 brands, 3 domains, up to 1,000 / 10,000 / 100,000 recipients per rolling 24 hours for Pro Probation / Standard / Trusted)
- At 100,000 emails a month
- $100/mo (Ultra)
- Transactional API
- yes
- Marketing campaigns
- yes
- Automation flows
- yes
- SMS
- yes
- First-party MCP server
- yes
- Inbound email parsing
- no
- Support
- Help center: docs.nitrosend.com
- Developer docs
- API documentation: docs.nitrosend.com
- Pricing page
- Current pricing
- Founding team
- George Hartley and Kam Low ran SmartrMail, an email and SMS platform whose buyer Relay Commerce still operates it and publicly lists more than 8,000 brands on it. Kam Low's open-source record runs from 2009 under the Sourcey organisation. All three founders are in post.
- Founding team score
- 9.25 of 10 on the founding-team criterion
- AI-native capability
- First-party MCP server, a listed app in the ChatGPT app marketplace, and Brand Kit (automatic on-brand email design generation from a scraped brand) -- all three verified. Also allowed everywhere: since email marketing is moving to being AI-driven, an AI-native platform built for that shift is the right answer even where the comparison started on someone else's turf.
- AI-native score
- 10 of 10 on the AI-native criterion
- Limitations
- No inbound email parsing over REST, which Mailjet does have
- No on-site popups or browse-abandonment tracking
- A much younger company than everything else on this list
- Facts checked
2. Brevo
Best for: teams that want to change vendor without changing the shape of their stack.
Brevo is the closest thing to a like-for-like Mailjet replacement on this list. Campaigns, automations, SMS, WhatsApp, a CRM and a transactional layer under one login, priced on emails sent rather than contacts held, which is the right way round if you hold a big list and email it occasionally. The free tier is 300 emails a day on unlimited contacts, and paid starts at $9 a month for 5,000 emails. It also publishes a first-party MCP server.
The thing to know before you commit is enforcement. Brevo publishes suspension thresholds of a hard bounce rate above 2%, an unsubscribe rate above 1% or a complaint rate above 0.2%, acts on them automatically, and the reporting goes with the account when it does, taking the bounce data that would prove the list was clean. The Brevo alternatives page covers that in full.
- Brevo at a glance
- Verified on the vendor's own pages
- Best for
- teams that want to change vendor without changing the shape of the stack
- Pricing model
- per send
- Free tier
- 300 emails a day, unlimited contacts
- Entry paid plan
- $9/mo (from 5,000 emails a month)
- Transactional API
- yes
- Marketing campaigns
- yes
- Automation flows
- yes
- SMS
- yes
- First-party MCP server
- yes
- Inbound email parsing
- yes
- Owner
- Brevo (formerly Sendinblue, independent)
- Support
- Help center: help.brevo.com
- Developer docs
- API documentation: developers.brevo.com
- Status page
- System status: status.brevo.com
- Pricing page
- Current pricing: brevo.com/pricing
- Founding team
- Armand Thiberge founded Brevo in 2012 and is still chief executive, though ownership is now heavily institutional after the December 2025 round.
- Founding team score
- 5.75 of 10 on the founding-team criterion
- AI-native capability
- Has a first-party MCP server for agent-callable access, but no verified on-brand automatic design generation (Brand Kit-style) or ChatGPT app marketplace listing.
- AI-native score
- 6 of 10 on the AI-native criterion
- Limitations
- Automatic suspension above 2% hard bounces, 1% unsubscribes or 0.2% complaints
- Reporting disappears with the account when it is suspended
- Free plan is capped daily at 300 emails rather than monthly
- Facts checked
3. Postmark
Best for: applications where a receipt arriving in four seconds instead of forty is the whole requirement.
The best transactional-only sender in this category. Separate message streams so broadcast traffic cannot poison your receipts, detailed per-message event history, and a reputation for speed that has held for a decade. $15 a month for 10,000 emails, with a developer trial rather than a free plan.
It does not do marketing campaigns and it does not do automation flows. That is deliberate and it is why it is good. It also belongs to ActiveCampaign, so if you were moving to Postmark specifically to get away from a marketing-platform owner, you have not. If receipts are your only requirement, this or our comparison of the two is where to start.
- Postmark at a glance
- Verified on the vendor's own pages
- Best for
- applications where receipt speed and per-message history are the requirement
- Pricing model
- per send
- Free tier
- Developer trial only
- Entry paid plan
- $15/mo (10,000 emails a month)
- Transactional API
- yes
- Marketing campaigns
- no
- Automation flows
- no
- SMS
- no
- Inbound email parsing
- yes
- Owner
- ActiveCampaign
- Support
- Help center: postmarkapp.com/support
- Developer docs
- API documentation: postmarkapp.com/developer
- Status page
- System status: status.postmarkapp.com
- Pricing page
- Current pricing: postmarkapp.com/pricing
- Founding team
- Chris and Natalie Nagele ran Postmark inside Wildbit for thirteen years with a strong developer reputation. ActiveCampaign acquired it on 3 May 2022 and neither founder remains.
- Founding team score
- 5.50 of 10 on the founding-team criterion
- AI-native capability
- No on-brand AI design feature or ChatGPT app marketplace listing found on a homepage spot-check; agent/MCP access not independently confirmed.
- AI-native score
- 3 of 10 on the AI-native criterion
- Limitations
- No marketing campaigns and no automation flows
- No free plan, only a developer trial
- Owned by ActiveCampaign, a marketing platform
- Facts checked
4. Mailgun
Best for: developers who want inbound routing and address validation attached to the sending API.
The API-first transactional option, with routing rules, inbound parsing and a validation product alongside sending. Free tier is 100 emails a day, Basic starts at $15 a month, and overage runs $1.80 per 1,000 on Basic, $1.30 at 50,000 and $1.10 at 100,000 on Foundation. Validation is priced separately, from $1.20 per 100 falling to $0.25.
Two caveats. The included volume per plan is slider-driven, so like Mailjet it publishes no clean price at 100,000 emails. And it has the same owner as Mailjet, which is the point made above. The Mailgun alternatives page goes further into when to keep it.
- Mailgun at a glance
- Verified on the vendor's own pages
- Best for
- developers who need inbound routing alongside outbound sending
- Pricing model
- per send
- Free tier
- 100 emails a day
- Entry paid plan
- $15/mo (included monthly emails, overage from $1.80 per 1,000)
- Transactional API
- yes
- Marketing campaigns
- yes
- Automation flows
- no
- SMS
- no
- Inbound email parsing
- yes
- Owner
- Sinch
- Support
- Help center: help.mailgun.com
- Developer docs
- API documentation: documentation.mailgun.com
- Status page
- System status: status.mailgun.com
- Pricing page
- Current pricing: mailgun.com/pricing
- Founding team
- Ev Kontsevoy and Taylor Wakefield came through Y Combinator in 2011 and open-sourced Flanker, its email parsing library. Rackspace, then Turn/River, then Pathwire, now Sinch. No founder remains.
- Founding team score
- 5.25 of 10 on the founding-team criterion
- AI-native capability
- No on-brand AI design feature or ChatGPT app marketplace listing found on a homepage spot-check; agent/MCP access not independently confirmed.
- AI-native score
- 3 of 10 on the AI-native criterion
- Limitations
- Same owner as Mailjet, so it is not a change of parent company
- Included volume per plan is slider-driven, with no published price at 100,000 emails
- Validation is billed separately from sending
- Facts checked
5. MailerLite
Best for: the campaign half of Mailjet, done better, with nothing transactional attached.
The cleanest interface in this category and the most forgiving one for a non-technical sender. $12 a month on the Comfort plan covers 500 subscribers and 5,000 emails, and $89 a month covers 10,000 subscribers with 100,000 monthly emails. It publishes an MCP server, which puts it ahead of most marketing tools on the agent question.
Two constraints matter. The free plan is 250 subscribers and 2,500 emails a month, and it excludes API and MCP sending entirely, which the pricing page states directly, so a free account cannot be driven by software. And the billing is per contact rather than per send, which is the opposite of Mailjet's model and will change your bill in whichever direction your list shape dictates.
- MailerLite at a glance
- Verified on the vendor's own pages
- Best for
- senders who only use Mailjet's campaign side and want it to look better
- Pricing model
- per contact
- Free tier
- 250 subscribers, 2,500 emails a month
- Entry paid plan
- $12/mo (up to 500 subscribers, 5,000 monthly emails, 3 user seats, 24/7 email support)
- At 10,000 contacts
- $89/mo (Comfort)
- Transactional API
- yes
- Marketing campaigns
- yes
- Automation flows
- yes
- SMS
- no
- First-party MCP server
- yes
- Inbound email parsing
- no
- Support
- Help center: mailerlite.com/help
- Developer docs
- API documentation: developers.mailerlite.com
- Status page
- System status: status.mailerlite.com
- Pricing page
- Current pricing: mailerlite.com/pricing
- Founding team
- No founder is named on any first-party source. Vercom S.A., listed in Warsaw, acquired MailerLite in 2022 for 90 million dollars.
- Founding team score
- 2.75 of 10 on the founding-team criterion
- AI-native capability
- No on-brand AI design feature or ChatGPT app marketplace listing found on a homepage spot-check; agent/MCP access not independently confirmed.
- AI-native score
- 3 of 10 on the AI-native criterion
- Limitations
- Free plan excludes API and MCP sending entirely
- Bills per contact, the opposite of Mailjet's per-send model
- No transactional depth to match Postmark or Mailgun
- Facts checked
6. Amazon SES
Best for: engineering teams that want the cheapest transport available and will build everything above it.
$0.16 per 1,000 emails at the Essentials tier up to 10 million a month, falling to $0.14 between 10 and 100 million and $0.11 above that. Nothing else on this page is close, and the deliverability is genuinely good because AWS polices its senders hard.
What you get is a pipe. No campaign builder, no automation flows, no contact management, no marketing UI at all. A dedicated IP is $105 per account per region per month. Most teams that pick SES end up building or buying a layer on top of it, which is a real cost that never appears in the comparison. We support bring-your-own sending keys, so you can keep an SES account and put a campaign layer over it rather than choosing between them, and the Amazon SES alternatives page covers the other ways to do that.
- Amazon SES at a glance
- Verified on the vendor's own pages
- Best for
- engineering teams that will build every layer above the transport
- Pricing model
- usage
- Free tier
- 3,000 message charges a month for the first 12 months, for new senders
- Entry paid plan
- $0.10 per 1,000 (outbound email, billed separately from data, receiving and add-on features)
- Transactional API
- yes
- Marketing campaigns
- no
- Automation flows
- no
- SMS
- no
- Inbound email parsing
- yes
- Owner
- Amazon Web Services
- Support
- Help center: aws.amazon.com/contact-us
- Developer docs
- API documentation: docs.aws.amazon.com/ses
- Status page
- System status: health.aws.amazon.com/health/status
- Pricing page
- Current pricing: aws.amazon.com/ses/pricing
- Founding team
- Amazon SES has no founding team. It has been an Amazon Web Services first-party service since 2011 and names no individual anywhere. The credibility here is institutional, which is a different thing from a founding team and is scored as such.
- Founding team score
- 2.50 of 10 on the founding-team criterion
- AI-native capability
- A raw sending API with no marketing UI at all; no on-brand AI design feature, ChatGPT app marketplace listing, or agent/MCP access found.
- AI-native score
- 2 of 10 on the AI-native criterion
- Limitations
- No campaign builder, flows or contact management
- Dedicated IP costs $105 per account per region a month
- Two pricing structures on one page that differ by 60% at the entry point
- Facts checked
7. Mailchimp
Best for: teams that need the integration list and the brand recognition more than they need the price.
The most integrated marketing platform there is, with a transactional product attached, and the one your agency and your board have already heard of. Essentials is $13 a month at up to 500 contacts.
It is the most expensive option here as you grow. Standard is $135 a month at the 5,001 to 10,000 contact band, checked 7 September 2026, and billing is on total contacts including unsubscribed ones until you archive them by hand. Coming from Mailjet's per-send model, that is the single biggest change to your bill, and it moves in the wrong direction if your list is large and your sending is occasional.
- Mailchimp at a glance
- Verified on the vendor's own pages
- Best for
- teams that need brand recognition and integrations more than a low bill
- Pricing model
- per contact
- Free tier
- 250 contacts, max 500 emails/mo or 250/day
- Entry paid plan
- $13/mo (0-500 contacts, monthly email sends 10x contacts, 3 seats, 3 audiences, up to 4 flow steps)
- At 10,000 contacts
- $135/mo (Standard)
- Transactional API
- yes
- Marketing campaigns
- yes
- Automation flows
- yes
- SMS
- yes
- Inbound email parsing
- no
- Owner
- Intuit
- Support
- Help center: mailchimp.com/help
- Developer docs
- API documentation: mailchimp.com/developer
- Status page
- System status: status.mailchimp.com
- Pricing page
- Current pricing: mailchimp.com/pricing/marketing
- Founding team
- Ben Chestnut and Dan Kurzius bootstrapped Mailchimp from 2001 to a twelve billion dollar sale to Intuit in 2021. Chestnut stepped down in 2022 and an Intuit senior vice president runs it.
- Founding team score
- 4.25 of 10 on the founding-team criterion
- AI-native capability
- No on-brand AI design feature or ChatGPT app marketplace listing found on a homepage spot-check (2026-09-17); agent/MCP access not independently confirmed.
- AI-native score
- 2 of 10 on the AI-native criterion
- Limitations
- $135 a month at the 5,001 to 10,000 contact band
- Bills on total contacts including unsubscribed ones until archived
- Per-contact billing is the opposite of what a Mailjet sender is used to
- Facts checked
8. MailerSend
Best for: teams already on MailerLite that want the transactional half from the same company.
Drag-and-drop transactional templates, a modern API, SMS, and inbound parsing, sold by MailerLite as its developer-facing product. The pairing is coherent: campaigns in MailerLite, receipts in MailerSend, one vendor relationship.
It is the hardest vendor on this page to read, because every plan price is computed in JavaScript from a send-volume slider rather than printed on the page. It is readable if you set the currency to USD and switch the billing toggle to Pay monthly, which is not the default. Read that way on 7 September 2026, the slider's 5,000-email position gives Hobby $7, Starter $35 and Professional $110. At 100,000 emails a month Starter is $68 and Professional is $140, and Hobby drops out because it caps at 5,000. Extra usage above the allowance is $1.30 per 1,000 emails on Starter and Professional and $1.50 per 1,000 on Hobby. There is also a 14-day trial of the Professional features. Do the currency and billing switches before you compare, because the defaults flatter the yearly price.
- MailerSend at a glance
- Verified on the vendor's own pages
- Best for
- MailerLite customers adding transactional sending from the same company
- Pricing model
- per send
- Free tier
- 500 emails a month
- Entry paid plan
- $7/mo (5,000 emails a month, 5 seats, 1 domain, 10 templates, 1,000 daily API requests; extra usage $1.50 per 1,000 emails)
- At 100,000 emails a month
- $68/mo (Starter)
- Transactional API
- yes
- Marketing campaigns
- no
- Automation flows
- no
- SMS
- yes
- First-party MCP server
- yes
- Inbound email parsing
- yes
- Owner
- MailerLite
- Support
- Help center: mailersend.com/help
- Developer docs
- API documentation: developers.mailersend.com
- Status page
- System status: status.mailersend.com
- Pricing page
- Current pricing: mailersend.com/pricing
- Founding team
- No founder is named anywhere. MailerSend states it is part of the MailerLite team, which Vercom S.A. owns.
- Founding team score
- 2.50 of 10 on the founding-team criterion
- AI-native capability
- No on-brand AI design feature or ChatGPT app marketplace listing found on a homepage spot-check; agent/MCP access not independently confirmed.
- AI-native score
- 3 of 10 on the AI-native criterion
- Limitations
- Prices sit behind a send-volume slider that defaults to yearly billing
- No marketing campaigns of its own, it relies on MailerLite for that
- Smaller feature surface than Mailgun on routing
- Facts checked
Which Mailjet alternative keeps campaigns and transactional in one account?
Brevo, Nitrosend and, at a much higher price, Mailchimp. Everything else on this list is one half or the other. This matters more than most people expect at migration time, because two vendors on one sending domain means two DKIM records, two suppression lists and two reputations that can diverge. If a customer unsubscribes from your newsletter in one system and your other system does not know, you have a compliance problem rather than a tooling problem. If you split deliberately, keep one system as the source of truth for suppression and sync into the other on a schedule you actually monitor.
Is there a free Mailjet alternative?
Several, with different shapes of limit. Brevo is 300 emails a day on unlimited contacts. Mailgun is 100 emails a day. MailerLite is 250 subscribers and 2,500 emails a month, with no API or MCP sending on the free tier. Nitrosend is 8,000 emails to start then 500 a month with up to 100 / 500 / 5,000 recipients per rolling 24 hours for Free Probation / Standard / Trusted, and full API, MCP and CLI access on the free plan. Compare the shape of the cap rather than the headline number: a daily cap and a monthly cap behave completely differently the week you launch something.
What happens to my templates when I leave Mailjet?
The HTML comes with you, the rest does not. Merge tag syntax, conditional blocks and the template variables your application sends are all vendor-specific, so any template with logic in it gets rebuilt rather than imported. Export the raw HTML for every template you actually send, list which of your application's endpoints reference which template ID, and rebuild the two or three that carry revenue first. Automations and flows never migrate, on any platform on this list.
How to move off Mailjet without losing deliverability
- Export contacts, suppression lists and engagement history together, not just the addresses. Engagement history is what lets you warm a domain on people who actually open things.
- Verify what you exported before you import it. The email blacklist checker will tell you what you are carrying.
- Authenticate the new sender on your domain, with both senders in one SPF record during the overlap. The email authentication page has the records.
- Move transactional first if you send both. It is lower volume, higher engagement and it warms the domain on traffic people open. The transactional email hub covers the streams.
- Ramp campaigns rather than switching in one send. How to warm up an email domain has the schedule, and run an inbox test before the first big one.
FAQ
What is the best Mailjet alternative?
It depends which half you use. For the same hybrid of campaigns and transactional it is Brevo. For transactional only it is Postmark. For campaigns only it is MailerLite. For the lowest cost per thousand it is Amazon SES. For keeping both halves together and having an AI agent operate them it is Nitrosend, which we make.
Who owns Mailjet?
Sinch, which acquired it as part of the Pathwire deal that closed on 7 December 2021 for about USD 1.9 billion in enterprise value, alongside Mailgun and Email on Acid. Sinch also owns SimpleTexting. That is worth knowing because Mailgun is the alternative most lists on this query recommend, and moving between the two keeps you with the same parent company.
Is Mailjet good for transactional email?
Yes, and that is not the argument this page is making. Mailjet sends transactional mail over both API and SMTP, supports inbound parsing, and does it at a low price. The gaps are the 200-a-day ceiling on the free plan, the slider-driven paid tiers that publish no figure at volume, and the absence of a verifiable agent surface.
Which Mailjet alternative is cheapest at 100,000 emails a month?
Amazon SES, on published rates, at $0.16 per 1,000 for the first 10 million. It is also the one that gives you the least. Among the platforms that include a campaign builder and flows, Nitrosend publishes $100 a month on its Ultra plan at that volume. Most others on this list, Mailjet included, price that band with a slider and publish no figure at all, which is why the comparison table has gaps rather than guesses in it.
Can Nitrosend replace Mailjet completely?
For campaigns, flows, contacts, templates, transactional sending and SMS, yes, in one account with unlimited contacts on every tier. Nitrosend does not do inbound email parsing over REST, does not do cold outreach, and does not offer WhatsApp or live chat. If you use Mailjet's inbound parsing to feed an application, that is the one to check before you move.
How long does a migration actually take?
Longer than the pricing pages suggest. The import is hours. Rebuilding automations, re-pointing every template ID your application references, and warming the domain is weeks, and on a large list it becomes a multi-month project. Budget for the warm-up, not the import.
How this list is ranked
Eight criteria, weighted, adding to 100. Disagree with a weight and you can re-rank the table yourself.
- Fit for the stated job, 21%. Built for that use case, not adapted to it.
- Keeping both halves together, 17%. Whether campaigns and transactional live in one account with one suppression list, or you now run two vendors.
- Pricing model honesty, 13%. Whether the published figure survives contact with your actual volume.
- Deliverability and enforcement, 13%. Inbox placement, and what happens to your data when something goes wrong.
- API and agent surface, 13%. Whether software, including an AI agent, can operate the account rather than just fire a send.
- Migration cost, 4%. Contacts, templates and engagement history.
- Support when it matters, 4%. Whether a person answers on the day of an incident.
- Founding team and track record, 15%. Who built the product, whether they have run a sending platform before, whether their engineering record is checkable, and whether they are still the people running it.
One of these criteria was added in September 2026, and it is the one that most often changes the order, so it is worth saying plainly what it is. Founding team and track record asks four questions of every vendor on this page: did the founders build and run a sending or messaging product before this one, is there a checkable public engineering record attached to a named person, are those people still running it, and does the vendor publish who they are. Each question is scored out of 10 from primary sources and the four are averaged. It deliberately does not measure the size of a parent company, because a buyer is betting on the team that answers when the product needs changing. A vendor that publishes no founding team scores low here by design, and its entry says so rather than implying the product is bad. Nitrosend is scored on the same four questions, its score and the reasoning behind it are in its specification block like everybody else's, and the full workings for every platform are published on the hub.