Sidekiq
sidekiq.org
Open-core background job processing for Ruby, with paid Pro and Enterprise tiers.
Portland developer running Sidekiq solo, an open-core business in the millions
Mike Perham is an independent open-source developer in Portland, Oregon, and the founder and CEO of Contributed Systems, his company for building and supporting open-source application infrastructure. He has been writing software since 1993 and contributing to open source since 1995.
He is the creator of Sidekiq, the widely used Redis-backed background job system for Ruby. Sidekiq follows an open-core model: the base library is free and open source, while Sidekiq Pro and Sidekiq Enterprise add commercial features and support. He also makes Faktory, a language-agnostic background job server.
Perham is one of the best-known examples of a one-person software company at scale. On Startups for the Rest of Us he described running the business with no employees or contractors, about 2,000 customers, and annual revenue in the single-digit millions, which he characterized as closer to $10 million than $1 million. Outside of software he advocates for micromobility and greener cities.

Podcastthoughtbot· 2026


Podcastsaas group· 2024


PodcastStartups for the Rest of Us· 2023

InterviewNate Berkopec· 2022


InterviewChangelog· 2016
The Changelog · Podcast
Code with Jason · Podcast
Ruby Events · Profile
Mike Perham has publicly reported Single-digit millions per year (self-reported) (as of 2023). Source
Sidekiq is made by Mike Perham through his company Contributed Systems, which he runs on his own.
Perham has said the business earns single-digit millions per year with about 2,000 customers and no employees.
@martindonadieu12K followers
French solo maker of Capgo, open-source live updates for Capacitor apps
Capgo, Naturopia$30K MRR
@dhh933K followers
Creator of Ruby on Rails and Omarchy, co-owner and CTO of 37signals
Ruby on Rails, Basecamp, HEY +1
Latvia
Latvian one-person founder of Healthchecks.io, the open-source cron job monitor
Healthchecks.io$26K MRR
@cperciva Canada16K followers
Canadian computer scientist who has run the Tarsnap backup service since 2008
Tarsnap, scrypt
@surajairme India244 followers
Founder of ChaiBuilder, an open-source visual website builder for React and Next.js
ChaiBuilder, chaicore, Chai Studio
@jekuer Germany1.2K followers
Munich CPTO and founder of Add to Calendar PRO, built on their open-source calendar button
Add to Calendar PRO, Add to Calendar Button, Add to Calendar Links +1