Sidekiq by Mike Perham is following the open core, paid subscription for a "pro" version containing extensions. His single founder company has a monthly recurri

Sidekiq by Mike Perham is following the open core, paid subscription for a "pro" version containing extensions. His single founder company has a monthly recurring revenue in excess of $80k, as featured on Indie Hackers[1]. [1] https://www.indiehackers.com/businesses/sidekiq https://www.indiehackers.com/businesses/sidekiq