commitlint validates commit messages against rules; Commitizen interactively guides you to write conventional commits. They complement each other.
commitlint checks that commit messages follow a convention (commonly Conventional Commits), failing the commit or CI when they do not. Commitizen provides an interactive prompt that builds a compliant commit message for you, lowering the chance of mistakes in the first place. They solve different ends of the same goal: Commitizen helps authors write correct messages, commitlint enforces them - many teams use both.
commitlint
Commitizen
Role
Validates messages
Guides writing messages
When it runs
commit-msg hook / CI
At commit time (prompt)
Enforcement
Yes (fails bad commits)
No (assists)
Setup
Config + rules
Adapter (e.g. cz)
Best for
Enforcing convention
Authoring convention
In CI
commitlint is the enforcement layer: run it in a commit-msg hook and again in CI on PR commits so non-conforming messages fail the build. Commitizen helps locally but cannot enforce anything by itself. The robust setup is Commitizen (or a guided template) for authoring plus commitlint in CI as the gate.
Speed it up
Commit-message linting is lightweight; cache dependencies so the job starts quickly. The check runs on CI runners; faster managed runners keep the validation step near-instant.
Benchmark on your repository before choosing
Build-tool benchmarks published by vendors use repositories chosen to show a difference. Yours is the only one that matters, and both a cold and a warm measurement are needed because CI mostly runs cold.
Terminal
# cold: no cache, the CI condition
rm -rf node_modules/.cache dist && time <tool> build
# warm: the local development condition
time <tool> build
# and the one people forget: incremental after a one-line change
echo "// touch" >> src/index.ts && time <tool> build
The verdict
Enforcing a commit convention so bad messages fail: commitlint, ideally in CI. Helping authors write conforming messages interactively: Commitizen. They are complementary, not competitors - use Commitizen to author and commitlint to enforce.
Frequently asked questions
commitlint vs Commitizen: Commit Conventions?
commitlint checks that commit messages follow a convention (commonly Conventional Commits), failing the commit or CI when they do not. Commitizen provides an interactive prompt that builds a compliant commit message for you, lowering the chance of mistakes in the first place.
In CI?
commitlint is the enforcement layer: run it in a commit-msg hook and again in CI on PR commits so non-conforming messages fail the build. Commitizen helps locally but cannot enforce anything by itself. The robust setup is Commitizen (or a guided template) for authoring plus commitlint in CI as the gate.
Speed it up?
Commit-message linting is lightweight; cache dependencies so the job starts quickly. The check runs on CI runners; faster managed runners keep the validation step near-instant.
Which should I choose?
Enforcing a commit convention so bad messages fail: commitlint, ideally in CI. Helping authors write conforming messages interactively: Commitizen. They are complementary, not competitors - use Commitizen to author and commitlint to enforce.
