Flagger vs Weave GitOps

Flagger—Visit Weave GitOps—Visit

Flagger #2 in Progressive Delivery Software —/10 Open source ✓ 0 of 4 features Visit Flagger

vs

Weave GitOps #4 in Progressive Delivery Software —/10 Free plan Free plan✓ 4 of 4 features Visit Weave GitOps

• Flagger fits best

  Teams automating progressive delivery on Kubernetes

• Weave GitOps fits best

  Kubernetes fleet teams wanting a free option

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Side by side

Feature	Flagger —/10 Visit ↗	Weave GitOps —/10 Visit ↗
At a glance
Editor score	—	—
Ranking	#2 in Progressive Delivery Software	#4 in Progressive Delivery Software
Best for	Teams automating progressive delivery on Kubernetes	Kubernetes fleet teams wanting a free option
Pricing model	Free	Free plan + paid
Starting price	Not published	Not published
Free plan	Not published	✓ (best)
Free trial	—	—
Deployment	Self-hosted	Self-hosted
Support	Community, Docs	Community, Docs, Email · 24/7
Integrations	20 integrations	12 integrations
Built for	Small business, Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features Flagger 0/4 · Weave GitOps 4/4
Traffic splitting	Not published	✓ (best)
Automated analysis	Not published	✓ (best)
Automatic rollback	Not published	✓ (best)
Kubernetes support	Not published	✓ (best)
Specs
Rollout strategies	Not published	Multiple
Deployment model	Not published	Self_hosted
Our review
Pros	Automates traffic shifting, promotion, and rollback Supports canary, A/B, blue-green, and traffic mirroring strategies Integrates with Flux CD, Prometheus, and major routing platforms	Free, open-source foundation for Kubernetes application management Canary, blue-green, and A/B rollout strategies with rollback actions Flux, observability, Terraform, and Crossplane integrations
Cons	Requires a self-hosted Kubernetes operating model Configuration uses Kubernetes custom resources Deployment strategies depend on supported meshes or ingress controllers	Enterprise capabilities require a separate edition Self-hosted deployment adds operational responsibility The documented progressive-delivery guide covers an unmaintained version
Our verdict	Flagger is an open-source Kubernetes operator for teams that want automated application releases on self-hosted Kubernetes. It progressively shifts traffic between application versions, evaluates service metrics, and runs validation before… Read the review →	Weave GitOps is an open-source extension to Flux that combines a web interface and CLI for managing Kubernetes applications through GitOps. It is aimed at DevOps and platform teams operating Kubernetes across on-premises, cloud, hybrid,… Read the review →

Strengths and trade-offs

• Flagger — where it wins

  • Automates traffic shifting, promotion, and rollback
  • Supports canary, A/B, blue-green, and traffic mirroring strategies
  • Integrates with Flux CD, Prometheus, and major routing platforms

  Where it doesn't

  • Requires a self-hosted Kubernetes operating model
  • Configuration uses Kubernetes custom resources
  • Deployment strategies depend on supported meshes or ingress controllers

• Weave GitOps — where it wins

  • Free, open-source foundation for Kubernetes application management
  • Canary, blue-green, and A/B rollout strategies with rollback actions
  • Flux, observability, Terraform, and Crossplane integrations

  Where it doesn't

  • Enterprise capabilities require a separate edition
  • Self-hosted deployment adds operational responsibility
  • The documented progressive-delivery guide covers an unmaintained version

• Flagger—/10 · Open source

  Automates canary, A/B, blue-green, and mirrored releases with metric-based rollback.

  Visit FlaggerFull verdict →
• Weave GitOps—/10 · Free plan

  A free, open-source Kubernetes option with progressive delivery and fleet controls.

  Visit Weave GitOpsFull verdict →