Best MailerSend alternatives in 2026

MailerSend has a cheap $7 entry plan and a hosted MCP server, but its free plan is 500 emails a month with a card required, newsletters live in MailerLite, a separate product, and entry plans keep activity for one day. For apps that send both kinds of email, the best MailerSend alternative is Unitpost: 5,000 emails free and campaigns on the same contacts.

Updated November 2, 2026. We make Unitpost, and it is on this list. Every score has a reason and the weights are published below, so you can re-rank it for your own needs. How we scored

#	Product	Best for	Free plan	Score
1	Unitpost	app teams sending both kinds of email	5,000 emails a month, 200 a day, no card	4.0
2	Brevo	marketers who want a full suite	300 emails a day	3.7
3	Resend	developer-first transactional email	3,000 emails a month, 100 a day	3.5
4	Postmark	mail that must reach the inbox	100 emails a month	3.0
5	Mailgun	high-volume senders and validation	100 emails a day on one domain	3.0
6	SendGrid	enterprises and multi-tenant platforms	None: a 60-day trial at 100 emails a day	2.8
7	Amazon SES	lowest cost at very high volume	None for SES; new AWS accounts get up to $200 in credits	2.5

Why teams look for a MailerSend alternative

The free plan is 500 emails a month, and it needs a card.
Newsletters and campaigns are MailerLite, a separate product.
Free and Hobby keep activity for one day.

When MailerSend is still the better choice

You want US and Canada SMS or WhatsApp next to transactional email
Non-developers will build templates in a visual builder
Your volume fits the $7 Hobby plan

Moving your email off MailerSend

There is no one-key importer for MailerSend: export your contacts and suppressions, import them, verify your sending domain, and move one kind of mail at a time

The picks

#1 · 4.0 / 5

Unitpost

Best for app teams sending both kinds of email

Transactional and marketing email on one API, one contact list and one bill, with a permanent free plan and an importer for six providers.

Pros

Permanent free plan, no card
One-key import from SendGrid, Resend, Mailgun, Postmark, Brevo and Loops
REST API, SMTP relay, MCP server and nine SDKs on every plan
Unlimited contacts on paid plans, priced by sends

Cons

A newer sender, without a long public track record
No sub-accounts, and dedicated IPs are not launched yet
SMS is on paid plans only

Free plan: 5,000 emails a month, 200 a day, no card
Paid from: $10 a month for 20,000 emails
Priced by: Emails sent

Start free See pricing

#2 · 3.7 / 5

Brevo

Best for marketers who want a full suite

A marketing suite with email, SMS, WhatsApp, a CRM and automation, plus a transactional API and SMTP relay. Its free plan sends the most email here.

Pros

The largest free volume: 300 emails a day
CRM, landing pages and automation built in
Paid plans sized by email volume, from $9 a month

Cons

SMS and WhatsApp credits are bought separately
A large step in price from Standard to Professional

Free plan: 300 emails a day
Paid from: $9 a month for 5,000 emails
Priced by: Emails sent

Unitpost vs Brevo Visit Brevo

#3 · 3.5 / 5

Resend

Best for developer-first transactional email

A clean, modern email API from the team behind React Email, with inbound email and an official MCP server on every plan. Marketing contacts are billed on a separate plan.

Pros

A modern API with clear errors and many SDKs
Inbound email on every plan, free included
React Email for building templates in code

Cons

Marketing is a second plan, priced by contacts ($40 a month for 5,000)
Free sending is capped at 100 emails a day

Free plan: 3,000 emails a month, 100 a day
Paid from: $20 a month for 50,000 emails
Priced by: Sends and contacts

Unitpost vs Resend Visit Resend

#4 · 3.0 / 5

Postmark

Best for mail that must reach the inbox

Transactional email known for fast, reliable inbox placement, with bulk mail kept on separate broadcast streams. It costs more, and the free plan is for testing.

Pros

The best-regarded deliverability record here
Transactional and bulk mail kept on separate streams
45 days of message content and good debugging tools

Cons

The free plan is 100 emails a month
No audience or campaign tools, and no inbound on Basic

Free plan: 100 emails a month
Paid from: $15 a month for 10,000 emails
Priced by: Emails sent

Unitpost vs Postmark Visit Postmark

#5 · 3.0 / 5

Mailgun

Best for high-volume senders and validation

A long-running email API with address validation and inbox placement testing. Strong at volume, with marketing campaigns left to other tools.

Pros

Email validation and inbox placement testing
EU region for data residency
Proven at very high volume

Cons

The free plan keeps logs for one day, on one domain
Marketing campaigns need another tool

Free plan: 100 emails a day on one domain
Paid from: $15 a month for 10,000 emails
Priced by: Emails sent

Unitpost vs Mailgun Visit Mailgun

#6 · 2.8 / 5

SendGrid

Best for enterprises and multi-tenant platforms

The long-running email API, now part of Twilio, with Marketing Campaigns as a separate product. Strong at scale; there is no free plan any more.

Pros

Proven at very high volume
Sub-accounts for multi-tenant platforms
Dedicated IPs from the Pro plan

Cons

No free plan: a 60-day trial, then from $19.95 a month
Marketing Campaigns is a separate product and plan

Free plan: None: a 60-day trial at 100 emails a day
Paid from: $19.95 a month (Essentials)
Priced by: Sends and contacts

Unitpost vs SendGrid Visit SendGrid

#7 · 2.5 / 5

Amazon SES

Best for lowest cost at very high volume

Amazon's sending service, inside AWS: the lowest price per email here. You build the rest yourself, from bounce handling to templates and dashboards.

Pros

$0.10 per 1,000 emails on pay-as-you-go pricing
Runs inside your AWS account and IAM
Inbound email as well as sending

Cons

No campaign builder or audience tools
Bounce handling, dashboards and reputation work are yours

Free plan: None for SES; new AWS accounts get up to $200 in credits
Paid from: $0.10 per 1,000 emails (new accounts start on a $0.16 plan)
Priced by: Emails sent

Visit Amazon SES

Scores side by side

Product	Free plan20%	Developer experience20%	Transactional + marketing20%	Switching15%	Deliverability15%	Scale10%	Total
Unitpost	5	5	5	2	3	2	4.0
Brevo	5	3	5	2	3	3	3.7
Resend	4	5	3	2	3	3	3.5
Postmark	2	4	2	2	5	3	3.0
Mailgun	3	3	2	2	4	5	3.0
SendGrid	1	3	3	2	4	5	2.8
Amazon SES	2	3	1	2	3	5	2.5

How we scored

This list is for teams sending app email through MailerSend who are weighing a switch. What matters to them: a free or cheap way to keep sending, a modern API, marketing email in the same place, and a move that keeps suppressions.

Free plan (20%). A permanent free plan large enough to run a small app on, with no card.
Developer experience (20%). A clear REST API, current SDKs, readable errors and docs.
Transactional + marketing (20%). Both kinds of email in one product, on one contact list and one bill.
Switching (15%). An importer, or a documented path, that moves MailerSend contacts, suppressions and templates.
Deliverability (15%). A long public record of inbox placement, and the tooling to protect it.
Scale (10%). Proven at very high volume, with dedicated IPs and enterprise plans.

Each product gets 1 to 5 per criterion, from its own pricing and docs pages. The total is the weighted mean, so changing a weight re-ranks the list.

Why Unitpost scored 4.0

Free plan: 5/5. 5,000 emails a month free for good, 200 a day, no card.
Developer experience: 5/5. Bearer-token REST API, nine SDKs, a CLI and an MCP server, with idempotency keys on sends.
Transactional + marketing: 5/5. Campaigns, segments and topics share the contact list and the bill with API sends.
Switching: 2/5. No importer or guide for MailerSend found; contacts move by CSV and the rest by API.
Deliverability: 3/5. Guided SPF, DKIM and DMARC with continuous checks, but a short public record so far.
Scale: 2/5. No sub-accounts, and dedicated IPs are not launched yet.

Checked November 2, 2026 against unitpost.com/pricing, unitpost.com/sms, registry.npmjs.org/unitpost.

Why Brevo scored 3.7

Free plan: 5/5. 300 emails a day, about 9,000 a month, on a permanent free plan.
Developer experience: 3/5. A full API and SMTP relay, shaped by the marketing suite rather than built for developers first.
Transactional + marketing: 5/5. Campaigns, automation and transactional sending in one account.
Switching: 2/5. No importer or guide for MailerSend found; contacts move by CSV and the rest by API.
Deliverability: 3/5. An established sender, without Postmark's public time-to-inbox record.
Scale: 3/5. Professional plans from 150,000 emails; the focus is marketing teams more than high-volume APIs.

Checked November 2, 2026 against brevo.com/pricing/, developers.brevo.com/docs/mcp-protocol, help.brevo.com/hc/en-us/articles/7959631848850, help.brevo.com/hc/en-us/articles/360021533839, registry.npmjs.org/@getbrevo/brevo.

Why Resend scored 3.5

Free plan: 4/5. 3,000 emails a month free, capped at 100 a day.
Developer experience: 5/5. The API many newer providers copy, with SDKs across most languages.
Transactional + marketing: 3/5. Broadcasts exist, but marketing contacts sit on a second plan and bill.
Switching: 2/5. No importer or guide for MailerSend found; contacts move by CSV and the rest by API.
Deliverability: 3/5. A shorter public record than SendGrid or Postmark.
Scale: 3/5. Higher-volume plans above Pro; less proven at the very largest volumes.

Checked November 2, 2026 against resend.com/pricing, resend.com/migrate, resend.com/docs/dashboard/receiving/introduction, github.com/resend/mcp-send-email, resend.com/docs/send-with-smtp, resend.com/docs/api-reference/api-keys/create-api-key, registry.npmjs.org/resend, resend.com/docs/dashboard/webhooks/retries-and-replays.

Why Postmark scored 3.0

Free plan: 2/5. 100 emails a month free, enough to test, not to run an app.
Developer experience: 4/5. A mature, well-documented API with official libraries.
Transactional + marketing: 2/5. Broadcast streams send bulk mail, but there are no audience or campaign tools.
Switching: 2/5. No importer or guide for MailerSend found; contacts move by CSV and the rest by API.
Deliverability: 5/5. A long public record of time-to-inbox, protected by separate streams.
Scale: 3/5. Handles large volume; dedicated IPs from 300,000 emails a month on Pro and above.

Checked November 2, 2026 against postmarkapp.com/pricing, postmarkapp.com/migration-guides, postmarkapp.com/lp/mcp, postmarkapp.com/developer/user-guide/send-email-with-smtp, registry.npmjs.org/postmark, postmarkapp.com/developer/webhooks/inbound-webhook.

Why Mailgun scored 3.0

Free plan: 3/5. A free plan of 100 emails a day on one domain, with one day of logs.
Developer experience: 3/5. A capable API on HTTP Basic auth, with a surface shaped by long history.
Transactional + marketing: 2/5. Built for transactional sending; marketing campaigns need another product.
Switching: 2/5. No importer or guide for MailerSend found; contacts move by CSV and the rest by API.
Deliverability: 4/5. Validation, inbox placement tests and dedicated IPs.
Scale: 5/5. Built for very high volume, with dedicated IP pools and enterprise plans.

Checked November 2, 2026 against mailgun.com/pricing/, mailgun.com/resources/guides/migrating-from-sendgrid-to-mailgun-email-api/, documentation.mailgun.com/docs/mailgun/mcp, documentation.mailgun.com/docs/mailgun/user-manual/sending-messages/send-smtp, registry.npmjs.org/mailgun.js, documentation.mailgun.com/docs/mailgun/user-manual/receive-forward-store/receive-http.

Why SendGrid scored 2.8

Free plan: 1/5. No free plan: a 60-day trial at 100 emails a day, then from $19.95 a month.
Developer experience: 3/5. A large API with SDKs, shaped by a decade of backwards compatibility.
Transactional + marketing: 3/5. Marketing Campaigns is a separate product with its own plans.
Switching: 2/5. No importer or guide for MailerSend found; contacts move by CSV and the rest by API.
Deliverability: 4/5. A long track record, with dedicated IPs from the Pro plan.
Scale: 5/5. Proven at very high volume, with sub-accounts and enterprise support.

Checked November 2, 2026 against twilio.com/en-us/products/email-api/pricing, twilio.com/docs/sendgrid/for-developers/sending-email/integrating-with-the-smtp-api, twilio.com/docs/sendgrid/ui/analytics-and-reporting/email-activity-feed, registry.npmjs.org/@sendgrid/mail, twilio.com/docs/sendgrid/for-developers/parsing-email/inbound-email.

Why Amazon SES scored 2.5

Free plan: 2/5. No SES free tier; new AWS accounts get up to $200 in credits.
Developer experience: 3/5. AWS SDKs and IAM: powerful, with more setup than an email API.
Transactional + marketing: 1/5. A sending service; it has no campaign builder.
Switching: 2/5. No importer or guide for MailerSend found; contacts move by CSV and the rest by API.
Deliverability: 3/5. Good infrastructure, but reputation monitoring is your job.
Scale: 5/5. AWS-scale throughput and dedicated IPs.

Checked November 2, 2026 against aws.amazon.com/ses/pricing/, docs.aws.amazon.com/ses/latest/dg/smtp-connect.html, docs.aws.amazon.com/ses/latest/dg/smtp-credentials.html, docs.aws.amazon.com/ses/latest/dg/vdm-dashboard.html, registry.npmjs.org/@aws-sdk/client-sesv2, docs.aws.amazon.com/ses/latest/dg/receiving-email-notifications-contents.html.

Frequently asked questions

Does MailerSend have a free plan?

Yes: 500 emails a month on one domain, with one template and 100 API requests a day, and a card is required. Unitpost's free plan is 5,000 emails a month with no card.

How do I move off MailerSend?

Export contacts and suppressions first, then rebuild templates and webhooks on the new provider, and switch traffic once its domain is verified.

Go deeper: Unitpost vs MailerSend · Best free email APIs

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