Enlace	Sitio web	Precio	Storage	Thread Safe	Chef Cookbook?
Resque	github.com/...	free	Redis	Sí	Sí
Sidekiq	sidekiq.org	OSS: Free PRO: $950/year ENTERPRISE: from $179/month	Redis	No	-
Beanstalkd w/Stalker	railscasts.com/...	free	flatfile		Sí
Delayed_Job	github.com/...	free	DB, active_record	Sí	-
IronWorker	iron.io/...	Custom plans	cloud, jobs limit	Sí	-