Buildkite
↗Flexible CI pipelines with hosted Linux compute or self-hosted build agents
FreemiumNo card
Free: up to 5 users, 10 concurrent jobs, 2,000 hosted Linux vCPU-min/month, 50 GB artifact storage and self-hosted agents. No card.
CI/CD & code
13 tools
CircleCI
↗Flexible hosted pipelines with multiple executors and parallel jobs.
FreemiumNo card
Free: 30k credits/month, up to 6,000 small-Docker build minutes, 5 active users and 30x concurrency. No credit card required.
Codecov
↗Turn code coverage uploads into pull-request checks and visual reports.
FreemiumNo card
Free for open-source projects; private-code Basic plan covers 1 user with unlimited repositories and uploads.
CodeRabbit
↗AI code reviews for pull requests, IDEs and the command line, with free access for open-source projects.
FreemiumNo card
Unlimited public and private repositories, PR summaries and limited reviews in IDE/CLI; open source gets Pro+ features.
Dependabot
↗Automated dependency updates and vulnerability alerts inside GitHub.
FreeNo card
Free inside GitHub for dependency alerts, security updates and version-update pull requests.
Depot
↗Fast remote Docker builds and CI runners with persistent caching
Trial onlyNo card
7-day trial of the $20/month Developer plan: 1 user, unlimited concurrency, 500 Docker build minutes, 2,000 Depot CI and GitHub Actions minutes, 25 GB cache.
Earthly
↗Repeatable containerized builds with a Dockerfile-like CI syntax
FreeNo cardOSS
Free local CLI with no account, card, or hosted quota; the 6,000 Satellite build-minute/month free tier ended when Earthly Cloud shut down on July 16, 2025.
GitHub Actions
↗Automate builds, tests, releases and workflows next to your code.
FreemiumNo card
Free for public repositories; private repositories include 2,000 minutes and 500 MB artifact storage/month.
GitLab CI/CD
↗Integrated pipelines, runners and environments for GitLab projects.
FreemiumNo cardOSS
Free: 400 GitLab.com compute minutes/month, 10 GiB storage and up to 5 users in a private top-level group. Self-managed runners do not consume minutes.
Jules
↗An asynchronous coding agent that works on real tasks in GitHub repositories and prepares changes for review.
FreemiumNo card
Free Jules: 15 tasks per rolling 24h and 3 concurrent, Gemini 2.5 Pro. Google AI Pro raises this to 100/15; Ultra to 300/60.
Semaphore
↗Fast hosted CI/CD pipelines with self-hosted open-source deployment
FreemiumNo cardOSS
Cloud: $15/month credits, 2,000 Ubuntu x64 2-vCPU minutes, 20 concurrent jobs, 100 GB artifacts, 20 GB egress. Community Edition: $0 self-hosted, unlimited users.
SonarQube Cloud (formerly SonarCloud)
↗Cloud code quality and SAST analysis for public and private repositories
FreemiumNo card
Free at $0/year: public projects plus private projects up to 50k LOC, main-branch and pull-request analysis, 30+ languages and SAST.
Trunk
↗Keep CI reliable with flaky test quarantine and parallel merge queues
FreemiumNo card
Free at $0/committer/month, up to 5 committers, 1M test spans per committer capped at 5M/month; includes flaky-test quarantine and PR comments. No credit card required.
ABOUT US
Curated tools, honestly reviewed.
Every tool in this category has been manually reviewed. Pricing, free tier limits and card requirements are checked before listing.
FAQ
Questions, answered.
Are these the best tools in this category?＋
They're the ones we'd actually use. We prioritize tools with a clear use case, a working free tier, and honest pricing, not the most popular or most marketed.
How do I filter by free tools only?＋
Use the pricing filter in the sidebar. Select Free or Freemium to narrow the list. Each card also shows whether a card is required.