SendGrid is a customer communication platform for transactional and marketing email.
Starting at $14.95/month
Best Postal Alternatives ranked by AI · updated Aug 2026
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Postal is an open-source mail delivery platform for organizations that send transactional and bulk email. It provides SMTP submission, web management, delivery tracking, and operational controls around outbound mail.
Top 6 Postal alternatives
Brevo is a comprehensive project management software that helps teams collaborate and track progress efficiently.
Starting from $20/month
Lob provides a suite of APIs for automating the offline world. Send postcards, letters, and checks to your customers, and much more.
Custom pricing
Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.
Postfix is an open-source mail-transfer agent used to send, receive, and relay email on Unix-like systems. It is designed for secure, reliable...
Pros
- More widely deployed and documented than Haraka
- Strong security defaults and operational stability
- Broad integration with Linux mail-hosting tools
Cons
- Less flexible for JavaScript-based custom workflows than Haraka
- Configuration syntax can be complex for advanced setups
- Not a complete mailbox or webmail platform by itself
Free, open source
Sendmail is a general purpose internetwork email routing facility that supports many kinds of mail-transfer and delivery methods.
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