Reviewed by the Softwares.com Editorial Team · Last updated June 2026 · How we rate
Key facts
- Vendor
- CNCF
- Pricing
- Open source — Free
- Free tier
- Yes
- Platforms
- Self Hosted, Api
- Best for
- Devops, Sre
- Editor rating
- 4.4 / 5
- Founded
- 2018
- Headquarters
- Remote
What is Flagger?
Flagger is a ci cd tool from CNCF. A progressive delivery tool that automates canary, A/B and blue-green deployments on Kubernetes using metrics from Prometheus and service meshes.
Flagger uses open source pricing and offers a free tier you can start on without a credit card. Free.
It's best suited to devops, sre and runs on Self Hosted, Api.
Standout strengths include automated canary analysis, works with multiple meshes, metric-driven rollbacks. Worth weighing: requires a service mesh or ingress, metric setup needed.
Flagger pricing
Pros
- Automated canary analysis
- Works with multiple meshes
- Metric-driven rollbacks
Cons
- Requires a service mesh or ingress
- Metric setup needed
Flagger vs alternatives
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Start free and see if it fits your workflow.
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Frequently asked questions
What is Flagger?
A progressive delivery tool that automates canary, A/B and blue-green deployments on Kubernetes using metrics from Prometheus and service meshes.
How much does Flagger cost?
Flagger is open-source-priced. It has a free tier.
Does Flagger have a free trial?
Flagger offers a free tier rather than a time-limited trial.
What platforms does Flagger support?
Flagger is available on Self Hosted, Api.