Who should use Courrier?

Courrier is an open-source project built for ruby on Rails developers.

Yes — Courrier is open source under the MIT license and free to use.

What platforms does Courrier run on?

Courrier runs on the web and API.

Is Courrier still active?

The GitHub repository shows 31 commits in the last 90 days.

Who develops Courrier?

Courrier is developed by Rails Designer.

How long has Courrier been around?

Courrier first shipped in 2025.

Is Courrier open source?

Yes — Courrier is open source under the MIT license, developed on GitHub.

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Courrier

Name: Courrier
Author: Rails Designer

railsdesigner.comInfrastructure

Courrier is an open-source Ruby library that offers a unified, provider-agnostic API for sending emails in Ruby applications. It supports multiple services including Mailgun, Postmark, Resend, and others through a simple configuration system. The gem includes features for templating, ActiveJob integration for background delivery, inbox previews for development, and automatic URL helpers. A companion rails_courrier gem adds Rails-specific generators and engine support for easier integration.

Open SourceMITWebAPI

Visit railsdesigner.com

54stars

4forks

1alternative

5features

2025since

Overview

5 features

Courrier sits in PulseGate's Frameworks & SDKs category. It focuses on managing email delivery code across different transactional email providers in Ruby on Rails applications. Courrier is an open-source project aimed at ruby on Rails developers. The project is open source (MIT). Courrier is available on the web and API.

Behind Courrier is Rails Designer, and it first shipped in 2025. The project is developed in the open on GitHub with 54 stars and 31 commits in the last 90 days. Key capabilities include Provider Abstraction, Email Templating, and ActiveJob Integration. It exposes integrations via a public API.

Summary written by a language model from the project’s public pages.

Provider Abstraction
Email Templating
ActiveJob Integration
Inbox Previews
URL Helpers

Built with & integrations

Framework

Rails

Connectors

API

Runs on

BrowserAPI-only

Detected from

Rails: /assets/application- in the HTML

Trust & compliance

License

MIT

Verified signals

HTTPSOpen Source GitHub · ★ 54Active maintenance

Indexing history

What PulseGate has recorded for this listing

Indexed29 Jul · 11:58 UTC
courrier verified against its public source
Source: PulseGate · Open

Frequently asked questions about Courrier

What is Courrier?: Courrier focuses on managing email delivery code across different transactional email providers in Ruby on Rails applications. It is catalogued under Frameworks & SDKs on PulseGate.
Who should use Courrier?: Courrier is an open-source project built for ruby on Rails developers.
Is Courrier free?: Yes — Courrier is open source under the MIT license and free to use.
What platforms does Courrier run on?: Courrier runs on the web and API.
Is Courrier still active?: The GitHub repository shows 31 commits in the last 90 days.
Who develops Courrier?: Courrier is developed by Rails Designer.
How long has Courrier been around?: Courrier first shipped in 2025.
Is Courrier open source?: Yes — Courrier is open source under the MIT license, developed on GitHub.

At a glance

Pricing: Open Source
Platforms: Web
Languages: English
Open source: Yes · ★ 54
License: MIT
Built for: Ruby on Rails developers
Model: Open source
Solves: Managing email delivery code across different transactional email providers in Ruby on Rails applications.

Registered as

GitHub: Rails-Designer/courrier

Developer

Rails Designer

Team

GitHub

Open source

View on GitHub

Stars: 54
Forks: 4
Open issues: 2
Last commit: 29 Jul 2026
Commits 90d: 31
Contributors: 6
Authorship: Team
Default branch: main
Latest release: v1.0.0 · 29 Jul 2026

Live coverage

Identity confidence: Medium · 72.8
Indexed: 29 Jul 2026
Lifecycle: Alive
Last seen: 29 Jul 2026

Identity audit (13)

Slug: courrier-railsdesigner-com
Lifecycle state recorded: 29 Jul 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 29 Jul 2026
Timeline basis: Indexed-at chronology. This listing's first-seen date was written by the catalog backfill, not observed here, so it is not treated as a sighting.
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 5 Aug 2026
Canonical URL: https://railsdesigner.com/open-source/courrier

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