





A grammar issue is rarely just a typo. It can weaken clarity, credibility, and confidence. Lumi helps you clean up the draft without flattening your voice.






Once the draft sounds right, grammar review removes the small issues that still make the page, essay, or email feel unfinished.
words improved
active users worldwide
average rating
languages supported
Alex Rodriguez
Law Student, Harvard University
It helps me turn rough AI-assisted drafts into something I would actually submit.
I use Lumi to smooth repetition, tighten sentence flow, and make sure the final draft sounds like me before I hand anything in.
Maya Chen
Tech Blogger, TechCrunch
Our first drafts sound less generic and need fewer manual edits.
We use Lumi to reshape outlines and AI-assisted copy into publishable posts with clearer tone, structure, and pacing.
Jordan Smith
PhD Candidate, MIT
It catches awkward phrasing before it reaches my team.
The rewrite and grammar workflow gives me a cleaner version without losing the original point, which saves a lot of revision time.














Choose the plan that works best for you. Upgrade or cancel anytime.
Start with Starter now, upgrade when you need more power. No commitments, cancel anytime.
Answers about what Lumi’s free grammar checker online fixes, how it handles clarity, and when to use it.
Still have questions? Visit our help center or read our blog guides for more insights.