vioscale
Comparison

CircleCI vs Flux CD

On the evidence we track, CircleCI leads this comparison with a composite score of 70/100. 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 formatsJSONMarkdownGraphQLor send Accept: application/json
★CircleCI70
Flux CD56
Score
Vioscale score
CircleCI70 / 100medium · 73%
Flux CD56 / 100low · 49%
Pricing
Free tier
CircleCI✓
Flux CD✓
Model
CircleCIfreemium
Flux CDopen_source
Price level
CircleCIlow
Flux CDfree
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 CD5,395
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 CD–
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

CircleCI is a CI/CD platform that automates code testing, validation, and deployment across various environments and platforms. It executes builds in isolated containers, integrates with version control systems, and provides intelligence to help development teams ship quality software faster.

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
HybridFree tier

Free tier available. Usage-based credit system with prepaid discounts. Pricing scales based on active users and build volume.

  • FreeFree
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✗
macOS
CircleCI✓
Flux CD✗
Windows
CircleCI✓
Flux CD✗
Linux
CircleCI✓
Flux CD✗
CLI
CircleCI✓
Flux CD✓
Deployment
Cloud / SaaS
CircleCI✓
Flux CD✓
Self-hosted
CircleCI✓
Flux CD✓
On-premise
CircleCI✓
Flux CD✗
Hybrid
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
15 total - 12 not shared
  • AWS
  • AWS ECS
  • AWS ECR
  • AWS Lambda
  • Docker
  • Heroku
  • Netlify
  • OpenID Connect
  • Vault
  • GCP
  • Stripe
  • MCP
Independently observed

Flux CD

25 total - 22 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
Independently observed

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