RubyCI is made by Kolosek, a team of senior engineers who have been building and testing Ruby on Rails applications since 2011.
We built RubyCI because we were tired of slow, expensive, and overcomplicated CI pipelines. As a Rails team ourselves, we wanted something that just works — fast builds, fixed pricing, and zero YAML configuration. So we built it.
Years building Rails apps
Tests run on RubyCI
Uptime guarantee
Average setup time
We started as Kolosek, a software consultancy helping startups and enterprises build reliable products with Ruby on Rails. After shipping hundreds of projects, we kept hitting the same problem: CI was always the bottleneck.
Slow builds, unpredictable costs, and hours spent maintaining YAML configs. We knew there had to be a better way. So we built RubyCI — a CI platform designed specifically for Ruby and Rails, with everything we wished existed: instant setup, fixed pricing, and built-in tools like SimpleCov, RubyCritic, and Brakeman.
Founded Kolosek as a Rails consultancy in Novi Sad, Serbia
Expanded to full-stack with React, cloud-native, and DevOps
Started building RubyCI to solve our own CI frustrations
Launched RubyCI publicly with zero-config setup and fixed pricing
Serving Ruby teams worldwide with the fastest Rails CI in the cloud
Every person working on RubyCI is a seasoned Rails developer. We use the same tools you do, face the same challenges, and build solutions that actually work in production.
Our engineers have shipped hundreds of Rails applications. We know the ecosystem inside out — from RSpec conventions to database optimization.
We run our own cloud infrastructure, manage thousands of CI builds daily, and maintain 99.9% uptime without cutting corners.
When you reach out, you talk to the engineers who build the product. No ticket queues, no chatbots — just fast, knowledgeable answers.
Your CI should be the fastest part of your workflow, not the slowest. We obsess over build times so you can ship with confidence.
No config files, no complex setup, no surprises on your bill. We believe the best tools are the ones that just work without thinking about them.
Your team depends on CI to ship every day. We maintain 99.9% uptime and treat every outage as a top priority — because your deploys depend on it.
Fixed pricing means no hidden costs. Our roadmap is driven by what our users actually need, and we communicate openly about what we're building and why.
We are an open source company. We develop and share openly, contribute to projects we use, and support local conferences, meetups, and initiatives like Rails Girls. The Ruby community made us who we are, and we're committed to giving back.
Over our 15 years of building Rails applications, we used every CI tool out there — CircleCI, GitHub Actions, Jenkins, Travis. They all had the same problems: complex configuration, unpredictable costs, and slow builds that got worse as our projects grew.
We built RubyCI to be the CI we always wanted. One that understands Rails, requires zero setup, and charges a fair, fixed price. I'm proud of what we've built, and I'm excited about what's ahead.
Nesha Zoric
Founder, RubyCI & Kolosek
Built by Rails developers who understand your workflow. Start free, no credit card required.
RubyCI