In simple English
When building an app, you often want to send a series of welcome emails to new users over several days. Writing this logic by hand leads to messy code and tangled background jobs. This tool gives you a clean way to plan, delay and send those scheduled messages. It saves you from writing custom database tables and unsubscribe checks yourself. It is free to use and plugs directly into your existing Rails application.
What it is
Caffeinate is a Rails engine that provides a simple domain-specific language for creating and managing scheduled message sequences. It tracks subscriptions, handles unsubscribes and works with ActionMailer or plain Ruby objects.
What it is good for
Solo developers building software-as-a-service applications who need to send onboarding email drips or scheduled text message notifications without setting up external marketing tools.
- Replaces messy background worker logic with a clean rules syntax.
- Manages user unsubscribes out of the box.
- Handles timezones and business-day delivery rules easily.
- Requires an existing Ruby on Rails application to run.
- Needs database migrations to store campaign state.
- Documentation heavily assumes you are using ActionMailer.
custom background worker logic and manual database state tracking
ActionMailer
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bundle add caffeinate rails g caffeinate:install rake db:migrate