AutoCrit and Grammarly get compared because they both "check your writing", but they were built for different jobs. Grammarly is a real-time grammar and clarity assistant for everyday prose. AutoCrit is a fiction-editing dashboard that benchmarks your manuscript's habits against published books in your genre. Disclosure first: Authors Starport competes with both, so read our view of the gap they share as a maker's case.
| Category | AutoCrit | Grammarly |
|---|---|---|
| Built for | Fiction manuscripts | Everyday prose — email, documents, web |
| Grammar and spelling | Present, not the focus | Its core job, in real time everywhere you type |
| Fiction analysis | Overused words, filter words, adverbs, dialogue tags, pacing signals, clichés, benchmarked by genre | None — deliberate fragments and dialect get flagged as errors |
| Voice | Compares you to a genre average | Edits toward standard, confident prose |
| Story and structure | Pacing signals only | None |
| Makes the edits? | No — reports, you revise | One-click per suggestion; the manuscript edit is yours |
| Where it runs | Browser editor; upload the manuscript | Browser extension, desktop, mobile, Word add-in |
| Pricing | Vendor-set subscriptions that change; check each site. We don't quote rivals' prices. | |
If you must choose one for the manuscript, AutoCrit — it at least knows what a novel is. Keep Grammarly for the emails, blurbs and newsletters around the book, where it's genuinely good. Many authors run both, for different things.
What neither does is read the story or make the line edit. AutoCrit's dashboard tells you how your adverb count compares to your genre; it can't tell you the midpoint doesn't land, and every resulting change is still yours to type. That's the layer Authors Starport is built for: a Developmental Critique cited to your text, a Line Editor that renders edits as tracked changes against a Style Sheet built from your own prose, and an Instant Score that covers the metrics ground. Our fuller pages: AutoCrit review, AutoCrit alternative, and Grammarly alternatives for novelists. The cheapest test of our side is the free Reader-Ready Scorecard.
Most writing tools give you an AI read of your pages and nothing else. Authors Starport is a full editing suite — developmental critique, a line edit delivered as tracked changes, a style sheet built from your own prose, a scene map and an instant score — and every one of those tools is grounded in what real readers actually respond to. Behind them sit 694,681 hook mentions extracted from real reader reviews, 137,874 book blurbs analysed for hook, stakes and tone, and 4,293 reader personas built from that data. On this site, since June 2026, authors have uploaded 74 manuscripts and run 214 completed critiques and edits plus 40 free Scorecards.
Compared with AutoCrit, which benchmarks your prose against a genre average, and Grammarly, which checks it against a general rulebook, Starport measures against what real readers respond to and against your own voice — and returns the edit done.
Counted from our own databases on 21 August 2026. We update these figures when we re-count; we don't round them up.
The Reader-Ready Scorecard grades your full manuscript on nine craft metrics, benchmarks it against professionally-edited books, and tells you exactly what to fix first. Free, in minutes.
Get your free Reader-Ready Scorecard →For the manuscript, yes — AutoCrit was built for fiction and benchmarks your prose habits against published books in your genre, while Grammarly edits toward standard everyday prose and flags deliberate fiction techniques as errors. Grammarly remains the better real-time assistant for the writing around your book.
No. They do different jobs. Grammarly is a grammar and clarity checker; AutoCrit is a fiction pattern dashboard with genre comparison. Neither reads story structure or makes a whole-manuscript line edit — for that you need a developmental read and a line editor such as Authors Starport.
If you write fiction and want to see your prose habits in numbers against your genre, AutoCrit adds something Grammarly doesn't have. If your real question is whether the story works, or you want the edits made rather than flagged, neither tool is the answer — that's a different category.