[pkalinowski]

Sidekiq is using Redis behind the scenes. It's a job queue system for Ruby and Ruby on Rails

[stef25]

Seems to have only a few extra features compared to Laravel's Horizon (from looking at screenshots, I could be totally wrong).

https://laravel.com/docs/5.7/horizon

Horizon is free, crazy something like this could be monetized so successfully.

[herval]

For every successful product, there's at least 10 free tools that do the same thing (or something similar). It's not crazy at all - people (in particular larger companies) need support, assurances the product will still exist/be maintained in the future, etc. A lot of people will pay you just so they have a human on the other side of the line to talk to, in case things go wrong.

[pkalinowski]

Never used Sidekiq myself, but I believe its value is mainly speed and reliability. It suits systems with hundreds of thousands of jobs to process. At least that's what I read on website :)