Mailchimp vs Postal
Mailchimp and Postal are both marketing automation software. Mailchimp is a commercial product from Intuit. Postal is open source under MIT, with 17k GitHub stars.
Which to pick
- Pick Mailchimp when
- A small business or nonprofit wants a familiar email newsletter tool with lots of templates.
- Pick Postal when
- You send large volumes of transactional email and want your own Sendgrid-style platform on your own IPs.
Side by side
Email marketing with templates, audience segmentation, automations, landing pages and basic e-commerce integration, owned by Intuit.
A self-hosted mail delivery platform for sending and receiving email from apps over SMTP and HTTP API, with click and open tracking and webhooks.
Prices have risen and the free plan has shrunk, while competitors offer more automation per dollar.
Deliverability, IP reputation and abuse handling become your job.
Production-ready (both)
Cloud service and mobile app
Self-hosted server
Not published
Ruby, Rails and MariaDB
Closed source, sold by Intuit
Open source, MIT (permissive)
Closed source: you use it under the maker's terms and cannot change or resell the code.
You can build it into a product you sell, as long as you keep its copyright notice.
1k Wikipedia readers a month on phones
17k GitHub stars
Not known
Established: started 9 years ago, latest release 3.3.7.
Other comparisons
More marketing automation platforms
Both sides were judged on 2026-11-03 from makers' descriptions, Wikipedia, READMEs and GitHub data. License, age and popularity lines are worked out directly.