vioscaleAI
Comparison

CircleCI vs Flux CD

On the evidence we track, CircleCI leads this comparison with a composite score of 76/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

CircleCI full profile →Flux CD full profile →
Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
★CircleCI76
Flux CD54
Score
vioscaleAI score
CircleCI76 / 100medium · 74%
Flux CD54 / 100low · 47%
Pricing
Free tier
CircleCI✓
Flux CD✓
Model
CircleCIfreemium
Flux CDopen_source
Price level
CircleCImid
Flux CDfree
Starting price
CircleCI$15
Flux CD–
Transparent
CircleCI✓
Flux CD–
Integrations
Count
CircleCI15
Flux CD25
Security
Disclosure policy
CircleCI✓
Flux CD✓
Fedramp
CircleCI✓
Flux CD–
Gdpr
CircleCI✓
Flux CD✓
Iso27001
CircleCI✓
Flux CD–
Pci
CircleCI✓
Flux CD–
Scorecard
CircleCI–
Flux CD8.8
Soc2
CircleCI✓
Flux CD–
Vulnerabilities
Reliability
Status page
CircleCI✓
Flux CD–
Adoption
Dependent repos
CircleCI–
Flux CD10
Github stars
CircleCI–
Flux CD5,418
Stackoverflow questions
CircleCI8,600
Flux CD–
Activity
Commits last 30d
CircleCI–
Flux CD10
Release
Cadence days
CircleCI–
Flux CD50
History
CircleCI–
Flux CD20 items
License
Spdx
CircleCI–
Flux CDApache-2.0
Language
Primary
CircleCI–
Flux CDGo
Market
Availability
Content
Faq
CircleCI8 items
Flux CD7 items
Hosting
Model
CircleCIcloud
Flux CD–

Capabilities

Feature-by-feature on the axes that matter for ci/cd tools. “-” means undocumented, not absent.

Deployment
Hosting
CircleCICloud + self-hosted
Flux CDCloud + self-hosted
Self-hosted runners
CircleCI✓
Flux CD✓
Core
Config-as-code pipelines
CircleCI✓
Flux CD✓
Matrix / parallel builds
CircleCI✓
Flux CD-
Build
Container-native builds
CircleCI✓
Flux CD✓
Performance
Build caching
CircleCI✓
Flux CD-
Security
Secrets management
CircleCI✓
Flux CD✓
Delivery
Deployment environments & approvals
CircleCI✓
Flux CD✓
Ecosystem
Reusable actions / marketplace
CircleCI✓
Flux CD-

What each one is

The product in its own terms, so the numbers below have context.

CircleCI

Leader

A continuous integration and deployment service that automates software testing, building, and deployment across multiple compute environments, with intelligent workflow orchestration and parallel execution capabilities.

Independently observed

Flux CD

Continuous delivery solution for Kubernetes that enables GitOps workflows through automatic reconciliation from Git. A CNCF Graduated project.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

CircleCI

Leader
from $15/moUsage-basedFree tier

Free plan with 30k monthly credits. Performance plan starts at $15/month with usage-based pricing for additional credits.

  • FreeFree
    • 30,000 free credits/month
    • Docker, Windows, Linux, Arm, macOS environments
    • Self-hosted runners
    • Docker layer caching
    • Deploys
    • +3 more
  • Performance$15/month + $0.60 per 1,000 additional credits
    • 30,000 free credits/month included
    • All compute environments including GPU
    • Docker layer caching
    • Deploys
    • Single sign-on (SSO)
    • +4 more
as of verify ↗

Flux CD

Open sourceFree tier
as of verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platforms
Web
CircleCI✓
Flux CD✗
CLI
CircleCI✓
Flux CD✓
Deployment
Cloud / SaaS
CircleCI✓
Flux CD✓
Self-hosted
CircleCI✓
Flux CD✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

In common (3)
  • AWS EKS
  • AWS S3
  • GitHub

CircleCI

Leader
18 total - 15 not shared
  • AWS
  • AWS ECS
  • AWS ECR
  • AWS Lambda
  • Docker
  • Heroku
  • Netlify
  • OpenID Connect
  • Vault
  • GCP
  • Stripe
  • MCP
  • Firebase Distribution
  • Fastlane
  • Rollbar
Independently observed

Flux CD

36 total - 33 not shared
  • GitLab
  • Bitbucket
  • AWS KMS
  • Azure
  • Azure Key Vault
  • Azure AKS
  • Azure DevOps
  • Azure Event Hubs
  • Google Cloud Artifact Registry
  • Google Cloud Storage
  • Google Cloud Key Management Service
  • Google Kubernetes Engine
  • Google Cloud Pub/Sub
  • Slack
  • Google Chat
  • Kustomize
  • Helm
  • Harbor
  • Flagger
  • OCI
  • SOPS
  • Cluster API
  • Amazon Web Services
  • AWS IAM
  • +9 more
Independently observed
Still deciding?

CircleCI or Flux CD: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.