CI vs CD: Continuous Integration vs Continuous Delivery/Deployment

Mon, 03 Aug 2026 05:15:02 +0900

Overview

CI (Continuous Integration) and CD (Continuous Delivery/Deployment) are two connected stages of the same pipeline, not synonyms. CI focuses on automated testing of every code change as it merges, while CD focuses on automated deployment of that validated code into staging or production. Teams that only automate the first half often assume they have full ‘CI/CD’ when they’ve really just automated build-and-test.

Comparison Diagram

Comparison Table

Aspect	CI (Continuous Integration)	CD (Continuous Delivery/Deployment)
Trigger	Code commit or push to a shared repository	A successful CI run producing a new build artifact
Core process	Compile, run unit/integration tests, static analysis	Package the artifact, provision environments, run deployment scripts
Primary output	A verified, mergeable build artifact	A running release in staging and/or production
Environment scope	Build server or ephemeral test environment	Staging and/or production environments
Human gate	None — fully automated on every commit	Optional manual approval (Delivery) or none (Deployment)
Release cadence	N/A — runs per commit, not a release event	Can range from multiple times a day to once per commit
Failure consequence	Blocks the merge; breaks the build for the team	Blocks or rolls back the release; production stays on the last good version
Primary goal	Catch integration bugs early, keep the main branch releasable	Get every releasable build to users quickly and safely

Key Differences

CI’s output is a verified build artifact, not a live release
CD adds environment provisioning and deployment steps that CI never performs
A CI failure blocks the merge; a CD failure blocks the rollout instead
Continuous Delivery keeps a manual approval gate before production, while Continuous Deployment removes it
CI runs on every single commit; CD can be throttled by environment or business readiness

When to Use Each

CI (Continuous Integration)

Automation on IT Comparison

CI vs CD: Continuous Integration vs Continuous Delivery/Deployment

Overview

Comparison Diagram

Comparison Table

Key Differences

When to Use Each