Assembly Line

Postal vs useSend

Postal and useSend are both email sending and templating software. Postal is open source under MIT, with 17k GitHub stars. UseSend is open source under AGPL-3.0, with 4.8k GitHub stars.

Which to pick

Pick Postal when
You send large volumes of transactional email and want your own Sendgrid-style platform on your own IPs.
Pick useSend when
You want Resend or Postmark convenience at SES prices, hosted or self-hosted.

Side by side

What it does

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.

An email platform for transactional and marketing email that sends through Amazon SES, with an API, SMTP, dashboards and contact lists.

Watch out

Deliverability, IP reputation and abuse handling become your job.

Depends on an AWS SES account and its sending limits, and the project is young under AGPL.

Ready for

Production-ready

Usable

Runs as

Self-hosted server

Self-hosted server and cloud service

Built with

Ruby, Rails and MariaDB

TypeScript, Next.js, PostgreSQL and Amazon SES

Source code

Open source, MIT (permissive)

Open source, AGPL-3.0 (network copyleft)

What the license allows

You can build it into a product you sell, as long as you keep its copyright notice.

Use inside your business is unrestricted. If you change it and let customers use it over the internet, you must publish your changes.

How widely known

17k GitHub stars

4.8k GitHub stars

How established

Established: started 9 years ago, latest release 3.3.7.

Established: started 2 years ago, latest release v1.10.0.

Other comparisons

More email sending platforms and email templating tools

Every email sending and templating product and project, ranked

Both sides were judged on 2026-11-03 from each project's README and GitHub data. License, age and popularity lines are worked out directly.