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Postmark alternatives: 8 apps ranked by verified data

Facts checked Nov 8, 2026AppBreakup editorialHow we rankAll transactional email services

Top picks

Common reasons people leave Postmark: free plan allows only 100 emails a month, and less suited to large marketing newsletters. We ranked 8 alternatives by how directly each one replaces Postmark, then by reviews, real visits and how recently each app's facts were checked against its own website. Twilio SendGrid currently ranks first.

Quick comparison

#AppPricingVerified priceOpen sourcePlatformsVerified factsScore
1Twilio SendGrid logoTwilio SendGridPaid—NoWeb5 of 568.8
2Mailgun logoMailgunFree plan + paid$35/month for 50,000 emailsNoWeb8 of 864.8
3Resend logoResendFree plan + paid$20 a month for 50,000 emails (Pro)NoWeb6 of 659.4
4Mailtrap logoMailtrapFree plan + paid$15/month for 10,000 emailsNoWeb4 of 457.5
5Mailjet logoMailjetFree plan + paid$9 a month (Starter, 8,000 emails/month)NoWeb6 of 652.6
6Brevo logoBrevoFree plan + paid$9 a month for 5,000 emailsNoWeb, iOS, Android5 of 549.0
7ZeptoMail (Zoho CPaaS) logoZeptoMail (Zoho CPaaS)Paid—NoWeb5 of 542.3
8MailerSend logoMailerSendFree plan + paid$68/month for 100,000 emailsNoWeb5 of 542.3
  1. Twilio SendGrid logo

    1. Twilio SendGridTop pick

    Best for: Companies sending high volumes of app email that also want basic marketing campaigns from the same vendor

    PaidWeb

    68.8

    score / 100

    Why switch from Postmark

    Handles much larger volumes and adds a marketing campaign editor.

    Pros

    • Handles very large sending volumes
    • REST API and SMTP relay with SDKs for most languages
    • Marketing Campaigns tool for newsletters alongside the API
    • Dedicated IPs available on higher tiers

    Cons

    • No permanent free plan; the free trial ends after 60 days
    • Marketing Campaigns is billed separately from the Email API
    • Moving the site into Twilio's has made docs and pricing harder to find
    Visit Twilio SendGrid Compare with PostmarkDetails and reviews
    How this score is calculated
    Editorial fit ×0.3100
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Twilio SendGrid a good Postmark alternative?

    Verified facts

    5 of 5 verified
    Free trial
    100 emails/day for 60 days
    Checked Nov 8, 2026twilio.com(opens source in a new tab)
    Sending methods
    REST API or SMTP relay
    Checked Nov 8, 2026twilio.com(opens source in a new tab)
    Volume
    205+ billion emails a month
    Checked Nov 8, 2026twilio.com(opens source in a new tab)
    Uptime SLA
    99.99%
    Checked Nov 8, 2026twilio.com(opens source in a new tab)
    Marketing editor
    Drag-and-drop with templates
    Checked Nov 8, 2026twilio.com(opens source in a new tab)
  2. Mailgun logo

    2. Mailgun

    Best for: Developers who need a reliable email API with inbound routing and address validation

    Free plan + paidWeb

    64.8

    score / 100

    Why switch from Postmark

    Bigger free allowance per day plus an email validation API.

    Pros

    • Permanent free plan with 100 emails a day
    • Inbound email parsing and routing to your app
    • Email validation API from the same vendor
    • Detailed logs and deliverability tooling

    Cons

    • Free plan's daily limit only suits testing and tiny apps
    • Validation and extra emails are billed on top of the plan
    • No drag-and-drop marketing editor
    Visit Mailgun Details and reviews
    How this score is calculated
    Editorial fit ×0.387
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Mailgun a good Postmark alternative?

    Verified facts

    8 of 8 verified
    Free plan
    Yes, 100 emails/day
    Checked Nov 8, 2026mailgun.com(opens source in a new tab)
    Starting paid plan
    $35/month for 50,000 emails
    Checked Nov 8, 2026mailgun.com(opens source in a new tab)
    Extra emails
    From $1.80 per 1,000 (Basic)
    Checked Nov 8, 2026mailgun.com(opens source in a new tab)
    Customers
    150,000+ businesses
    Checked Nov 8, 2026mailgun.com(opens source in a new tab)
    Starting price
    $15/month for 10,000 emails (Basic)
    Checked Nov 8, 2026mailgun.com(opens source in a new tab)
    Foundation plan
    $35/month for 50,000 emails
    Checked Nov 8, 2026mailgun.com(opens source in a new tab)
    Scale plan
    $90/month for 100,000 emails
    Checked Nov 8, 2026mailgun.com(opens source in a new tab)
    Free trial
    1 month (Foundation and Scale)
    Checked Nov 8, 2026mailgun.com(opens source in a new tab)
  3. Resend logo

    3. Resend

    Best for: Developers and startups who want a modern email API with React-based templates

    Free plan + paidWeb

    59.4

    score / 100

    Why switch from Postmark

    Developer-first sending API with React Email templates, a newer take on Postmark's clean-API focus.

    Pros

    • Simple REST API plus SMTP relay and official SDKs
    • React Email templates fit naturally into JavaScript codebases
    • Free plan is enough for side projects and testing
    • Transactional and broadcast email in one account

    Cons

    • Free plan is capped at 100 emails a day
    • Dedicated IPs and SSO cost extra add-ons
    • Younger service with fewer marketing features than full email marketing suites
    Visit Resend Details and reviews
    How this score is calculated
    Editorial fit ×0.369
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Resend a good Postmark alternative?

    Verified facts

    6 of 6 verified
    Free plan
    Yes, 3,000 emails a month (100 a day)
    Checked Nov 8, 2026resend.com(opens source in a new tab)
    Starting price
    $20 a month for 50,000 emails (Pro)
    Checked Nov 8, 2026resend.com(opens source in a new tab)
    Sending methods
    REST API and SMTP relay
    Checked Nov 8, 2026resend.com(opens source in a new tab)
    Free trial
    No, free-forever plan instead
    Checked Nov 8, 2026resend.com(opens source in a new tab)
    Dedicated IP
    $30/month add-on
    Checked Nov 8, 2026resend.com(opens source in a new tab)
    Scale plan
    $90 a month for 100,000 emails
    Checked Nov 8, 2026resend.com(opens source in a new tab)
  4. Mailtrap logo

    4. Mailtrap

    Best for: Developers and QA teams who want email testing and transactional sending from one service

    Free plan + paidWeb

    57.5

    score / 100

    Why switch from Postmark

    Pairs a sending API with an email testing sandbox, so you can preview messages before they reach real inboxes.

    Pros

    • Sandbox catches staging email so real users never get test messages
    • Sending and testing in one account with shared templates
    • Free tiers for both sending and testing

    Cons

    • Free sending plan keeps only 3 days of logs and allows 150 emails a day
    • Testing and sending are separate subscriptions
    • Dedicated IPs only on the higher sending tiers
    Visit Mailtrap Details and reviews
    How this score is calculated
    Editorial fit ×0.363
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Mailtrap a good Postmark alternative?

    Verified facts

    4 of 4 verified
    Free plan
    4,000 emails/month, 150/day
    Checked Nov 8, 2026mailtrap.io(opens source in a new tab)
    Starting price
    $15/month for 10,000 emails
    Checked Nov 8, 2026mailtrap.io(opens source in a new tab)
    Email testing free plan
    50 test emails, 1 sandbox
    Checked Nov 8, 2026mailtrap.io(opens source in a new tab)
    Sending methods
    REST API and SMTP
    Checked Nov 8, 2026mailtrap.io(opens source in a new tab)
  5. Mailjet logo

    5. Mailjet

    Best for: Teams that need marketing and transactional email together, with collaborative editing

    Free plan + paidWeb

    52.6

    score / 100

    Why switch from Postmark

    Pairs an email API with a visual editor if marketing email matters too.

    Pros

    • Marketing and transactional email in one account
    • Real-time collaboration and approval workflows
    • Volume-based pricing with a free plan

    Cons

    • Free plan has a daily send cap
    • Basic automation
    • Limited support on lower tiers
    Visit Mailjet Details and reviews
    How this score is calculated
    Editorial fit ×0.346
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Mailjet a good Postmark alternative?

    Verified facts

    6 of 6 verified
    Free plan
    Yes, 6,000 emails/month (200 per day)
    Checked Nov 8, 2026mailjet.com(opens source in a new tab)
    Free plan card
    No credit card required
    Checked Nov 8, 2026mailjet.com(opens source in a new tab)
    Starter plan
    8,000 emails/month, no daily limit
    Checked Nov 8, 2026mailjet.com(opens source in a new tab)
    Starting price
    $9 a month (Starter, 8,000 emails/month)
    Checked Nov 8, 2026mailjet.com(opens source in a new tab)
    Essential plan
    $19 a month, 15,000 emails/month
    Checked Nov 8, 2026mailjet.com(opens source in a new tab)
    Premium plan
    $29 a month, 15,000 emails/month
    Checked Nov 8, 2026mailjet.com(opens source in a new tab)
  6. Brevo logo

    6. Brevo

    Best for: Businesses with large contact lists that want email, SMS and a CRM in one place

    Free plan + paidWeb, iOS, Android

    49.0

    score / 100

    Why switch from Postmark

    Puts transactional sending and marketing campaigns in one account, which Postmark keeps to a minimum.

    Pros

    • Priced by emails sent, not contacts stored
    • Email, SMS, WhatsApp and transactional email together
    • Free plan with daily sending allowance

    Cons

    • Free plan has a daily send limit and branding
    • Editor and templates less polished than some rivals
    • SMS credits cost extra
    Visit Brevo Details and reviews
    How this score is calculated
    Editorial fit ×0.334
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Brevo a good Postmark alternative?

    Verified facts

    5 of 5 verified
    Free plan
    Yes, up to 300 emails per day
    Checked Nov 8, 2026brevo.com(opens source in a new tab)
    Free plan terms
    Free forever, no card needed
    Checked Nov 8, 2026brevo.com(opens source in a new tab)
    Starter volume
    From 5,000 emails per month
    Checked Nov 8, 2026brevo.com(opens source in a new tab)
    Transactional messaging
    Email, SMS and WhatsApp via SMTP and API
    Checked Nov 8, 2026brevo.com(opens source in a new tab)
    Starting price
    $9 a month for 5,000 emails
    Checked Nov 8, 2026brevo.com(opens source in a new tab)
  7. ZeptoMail (Zoho CPaaS) logo

    7. ZeptoMail (Zoho CPaaS)

    Best for: Small businesses and Zoho users sending app email in irregular volumes without a monthly plan

    PaidWeb

    42.3

    score / 100

    Why switch from Postmark

    Transactional-only like Postmark, but paid with prepaid credits instead of monthly plans.

    Pros

    • Pay-as-you-go credits with no monthly minimum
    • Both SMTP relay and REST API with official client libraries
    • First credit of emails is free
    • SMS, WhatsApp and voice available from the same account

    Cons

    • Transactional mail only, so marketing email needs another tool
    • Credits expire after six months
    • The rename to Zoho CPaaS means docs and URLs are in flux
    Visit ZeptoMail (Zoho CPaaS) Details and reviews
    How this score is calculated
    Editorial fit ×0.312
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is ZeptoMail (Zoho CPaaS) a good Postmark alternative?

    Verified facts

    5 of 5 verified
    Pricing unit
    10,000 emails per credit
    Checked Nov 8, 2026zoho.com(opens source in a new tab)
    Credit validity
    6 months
    Checked Nov 8, 2026zoho.com(opens source in a new tab)
    Free credit
    First credit free
    Checked Nov 8, 2026zoho.com(opens source in a new tab)
    Sending methods
    SMTP and API
    Checked Nov 8, 2026zoho.com(opens source in a new tab)
    Current name
    Zoho CPaaS
    Checked Nov 8, 2026zoho.com(opens source in a new tab)
  8. MailerSend logo

    8. MailerSend

    Best for: SaaS and ecommerce teams who want an email API plus templates non-developers can edit

    Free plan + paidWeb

    42.3

    score / 100

    Why switch from Postmark

    Free plan plus drag-and-drop templates that non-developers can edit.

    Pros

    • Free plan for testing and small senders
    • Visual template editors alongside the API and SMTP relay
    • Built-in inbound routing, email verification and DMARC monitoring
    • Unused trial ends on the free plan, with no automatic charge

    Cons

    • Free plan needs a credit card and has tight daily API limits
    • SMS sending only works in the US and Canada
    • Dedicated IPs are reserved for high-volume enterprise accounts
    Visit MailerSend Details and reviews
    How this score is calculated
    Editorial fit ×0.312
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.15100
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is MailerSend a good Postmark alternative?

    Verified facts

    5 of 5 verified
    Free plan
    500 emails/month
    Checked Nov 8, 2026mailersend.com(opens source in a new tab)
    Free trial
    14 days of Professional
    Checked Nov 8, 2026mailersend.com(opens source in a new tab)
    Starter plan
    $68/month for 100,000 emails
    Checked Nov 8, 2026mailersend.com(opens source in a new tab)
    Nonprofit discount
    30%
    Checked Nov 8, 2026mailersend.com(opens source in a new tab)
    SMS coverage
    USA and Canada only
    Checked Nov 8, 2026mailersend.com(opens source in a new tab)

The best Postmark alternative for…

The highest-ranked app in this list for each need.

Twilio SendGrid logo

Best Postmark alternative for most people

Twilio SendGrid

Handles much larger volumes and adds a marketing campaign editor.

Mailgun logo

Best Postmark alternative for a free plan you can upgrade

Mailgun

Bigger free allowance per day plus an email validation API.

Brevo logo

Best Postmark alternative for iPhone and Android

Brevo

Puts transactional sending and marketing campaigns in one account, which Postmark keeps to a minimum.

Resend logo

Best Postmark alternative for working in the browser

Resend

Developer-first sending API with React Email templates, a newer take on Postmark's clean-API focus.

Postmark alternatives: common questions

What is the best alternative to Postmark?

Twilio SendGrid ranks first right now. Handles much larger volumes and adds a marketing campaign editor. Mailgun and Resend follow it in our ranking.

Postmark vs Twilio SendGrid: what's the difference?

Postmark is free with paid plans; Twilio SendGrid is a paid product. Both run on Web.

Is Postmark free?

Postmark is free with paid plans. Free plan: Yes, 100 emails a month; Starting price: $15 a month (Basic, 10,000 emails); Pro plan: $16.50 a month (10,000 emails); Platform plan: $18 a month (10,000 emails). Checked on Postmark's own site, November 2026.

How much do Postmark alternatives cost?

Verified prices for the top-ranked Postmark alternatives: Mailgun, $35/month for 50,000 emails; Resend, $20 a month for 50,000 emails (Pro); Mailtrap, $15/month for 10,000 emails; Mailjet, $9 a month (Starter, 8,000 emails/month); Brevo, $9 a month for 5,000 emails. Each price was checked on the app's own site; see each card below for the date and source.

Is there a free alternative to Postmark?

Yes. Mailgun (free plan + paid), Resend (free plan + paid), Mailtrap (free plan + paid) and Mailjet (free plan + paid) have a free option. Check each app's verified facts for current plan limits.

Is there an open-source alternative to Postmark?

None of the 8 alternatives in this list is open source.

Why do people switch from Postmark?

The complaints we hear most: free plan allows only 100 emails a month; less suited to large marketing newsletters; fewer custom sending domains on the cheapest plan.

How is this list ranked?

Every app is scored with the same published formula: how directly it replaces Postmark, reviews (weighted by verification), visits from AppBreakup, how recently its facts were checked against its own website, and reader votes.