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CI vs CD

Continuous Integration means every code change is automatically built and tested as soon as it is pushed, catching integration bugs early instead of at release time. Continuous Delivery goes further and automatically prepares every passing change for a production release (a human still clicks deploy). Continuous Deployment goes all the way and ships every passing change to production with no human gate at all.

Left

Continuous Integration

Right

Continuous Delivery/Deployment

AutomatesBuild + test on every pushPackaging, and optionally the release itself
Human gateNone needed for this stageDelivery: yes. Deployment: no
GoalCatch integration bugs fastGet validated changes into users’ hands fast
Failure mode if skippedBroken builds pile up before releaseManual, error-prone, slow releases
Typical toolsGitHub Actions, Jenkins, CircleCISame tools, extended with deploy stages

Use Continuous Integration when

You want fast feedback on every commit, this is the baseline every team should have regardless of release cadence.

Use Continuous Delivery/Deployment when

You want releases to be routine and low-risk rather than a scary quarterly event.

The verdict

CI is non-negotiable for any serious team. Whether you stop at Delivery (a human approves) or go to full Deployment depends on how much you trust your test suite and rollback story.

Study this on the roadmap

CI/CD

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Blue-Green vs Canary Deployment

Switching all traffic at once versus shifting a small slice first.

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