Postal Alternatives

Postal is described as 'The open source mail server - Postal is a complete and fully featured mail server for use by websites & web servers. Think Sendgrid, Mailgun or Postmark but open source and ready for you to run on your own servers' and is a Email Marketing service in the business & commerce category. There are nine alternatives to Postal for a variety of platforms, including Web-based, SaaS, Self-Hosted, Mac and Windows apps. The best Postal alternative is Mailgun. It's not free, so if you're looking for a free alternative, you could try Sendgrid or Resend.com. Other great apps like Postal are Postmark, Mailwhale, Sweego and UniOne Email API.

Postal iconPostal
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The open source mail server - Postal is a complete and fully featured mail server for use by websites & web servers....

More about Postal
More about Postal
Postal alternatives page was last updated May 21, 2025
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  1. Mailgun icon

    Mailgun

     32 likes
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    Mailgun is email automation for developers. Use our REST APIs to effortlessly send, receive and track email from your website or application.

    65 Mailgun alternatives

    License model

    Country of Origin

    • US flagUnited States

    Platforms

    • Online
    Mailgun screenshot 1

    Mailgun Features

    1.  REST API
    2.  SMTP Support
    3.  Email automation
    4.  Pricing per email sent

    Mailgun VS Postal

     

    • Mailgun is the most popular Web-based alternative to Postal.

    • Mailgun is the most popular commercial alternative to Postal.

    • Mailgun is Paid and ProprietaryPostal is Free and Open Source
  2. Sendgrid icon

    Sendgrid

     27 likes
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    Scalable email delivery for transactional email SendGrid transparently handles DKIM, SPF, ISP rate limits, content inspection, bounces, and spam reports to help users achieve higher deliverability. SendGrid integrates in minutes by just changing three SMTP settings.

    100 Sendgrid alternatives

    License model

    • Freemium • Proprietary

    Platforms

    • Online
    Sendgrid screenshot 1

    Sendgrid Features

    1.  SMTP Support
    2.  Email tracking

    Sendgrid VS Postal

     

    • Sendgrid is the most popular free alternative to Postal.

    • Sendgrid is Freemium and ProprietaryPostal is Free and Open Source
  4. Resend.com icon

    Resend.com

     1 like
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    Build, test, and send transactional emails at scale. Resend provides the best developer experience helping you reach users instead of spam folders.

    71 Resend.com alternatives

    License model

    • Freemium • Proprietary

    Country of Origin

    • US flagUnited States

    Platforms

    • Online
    • Software as a Service (SaaS)
    Resend.com screenshot 1

    Resend.com Features

    1.  SMTP Support
    2.  Custom Domain
    3.  API Integration
    4.  Golang

    Resend.com VS Postal

     

    • Resend.com is the most popular SaaS alternative to Postal.

    • Resend.com is Freemium and ProprietaryPostal is Free and Open Source
  5. Postmark icon

    Postmark

     7 likes
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    Postmark is a fast and reliable transactional email service. Send with Postmark to ensure your transactional emails get to the inbox on time, every time.

    License model

    Application type

    Country of Origin

    • US flagUnited States

    Platforms

    • Software as a Service (SaaS)
    Postmark screenshot 1

    Postmark Features

    1.  Transactional Email
    2.  SMTP Support

    Postmark VS Postal

     
  6. Mailwhale icon

    Mailwhale

     1 like
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    A bring-your-own-SMTP-server mail relay with REST API.

    License model

    • Free • Open Source

    Country of Origin

    • DE flagGermany
    • European Union flagEU

    Platforms

    • Online
    • Self-Hosted
    Mailwhale screenshot 1
    Discontinued

    This repository has been archived by the owner on Dec 23, 2023.

    Mailwhale Features

    1.  SMTP Support

    Mailwhale VS Postal

     

    • Mailwhale is the most popular Self-Hosted alternative to Postal.

    • Mailwhale is the most popular Open Source alternative to Postal.

    • Mailwhale is Free and Open SourcePostal is also Free and Open Source
  7. Sweego icon

    Sweego

     1 like
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    Sweego is an email and SMS sending platform for developers and builders. Send your message in minutes and monitor it easily.

    29 Sweego alternatives

    License model

    • Freemium • Proprietary

    Platforms

    • Online
    • Software as a Service (SaaS)
    Home

    Properties

    1.  Privacy focused

    Features

    1.  Ad-free
    2.  Webhook support
    3.  REST API
    4.  Email automation
    5.  Send newsletter
    6.  Email api
    7.  Transactional SMS
    8.  SMS Messaging

    Sweego VS Postal

     
  9. UniOne Email API icon

    UniOne Email API

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    API-based solution for transactional emails that is enabled to be integrated into any website or CRM system effortlessly.

    License model

    Application type

    Platforms

    • Online
    • Software as a Service (SaaS)
    UniOne Email API screenshot 1

    UniOne Email API Features

    1.  Transactional Email
    2.  Email automation
    3.  Email tracking

    UniOne Email API VS Postal

     
  10. EmailEngine icon

    EmailEngine

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    Headless email client.

    License model

    Platforms

    • Mac
    • Windows
    • Linux
    • Self-Hosted
    • Docker
    EmailEngine screenshot 1

    EmailEngine Features

    1.  Email automation
    2.  SMTP Support

    EmailEngine VS Postal

     

    • EmailEngine is the most popular Windows, Mac & Linux alternative to Postal.

    • EmailEngine is Paid and ProprietaryPostal is Free and Open Source

  11. Cuttlefish.io

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    Cuttlefish offers basic bounce email handling, ensuring you maintain your good mail reputation by not resending to bounced addresses.

    License model

    • Free • Open Source

    Platforms

    • Self-Hosted
    Cuttlefish.io screenshot 1

    Cuttlefish.io Features

    1.  Transactional Email

    Cuttlefish.io VS Postal

     
9 of 9 Postal alternatives