Grammarly is the most widely used grammar checker in the world, and for general prose it earned that position. This is a factual comparison of how general-purpose checkers and code-aware checkers behave on text developers actually write: READMEs, commit messages, docs, and comments mixed with code.
Where They Agree
Both handle the fundamentals: agreement, articles, tense, punctuation, spelling. On a plain email or blog post, they flag largely the same issues.
Where They Differ: Text That Contains Code
| Input | General-purpose checker | Code-aware checker |
|---|---|---|
def get_user(user_id): in a docstring |
May flag def and user_id as errors |
Recognized as code, skipped |
npm install --save-dev |
Flags as ungrammatical | Recognized as a command |
| camelCase identifiers | Frequently flagged as typos | Skipped by design |
The difference is not better grammar rules - it is whether the tool has a model of what code looks like. A checker that treats every identifier as a spelling mistake trains you to dismiss it.
Practical Differences
- Deployment: Grammarly ships as extensions and apps; code-aware checkers like Lint run in the browser with no install
- Scope: one optimizes for business prose, the other for technical documents where code must stay untouched
- Cost: subscription vs a free daily tier and BYOK (unlimited, $0 with your own API key)
Which Should You Use?
If your text is pure prose, any mature checker works. If it regularly mixes prose with code, identifiers, and commands, a code-aware checker gives you fewer false alarms. Some developers use both: one for email, one for the repo.
👉 Try Lint free - 5 checks a day, no signup, and it never "fixes" your userId.
Top comments (0)