Grammarly vs ProWritingAid for Editing a Long Fiction Draft

For a long fiction draft, choose the tool around the pass you need. Grammarly is the better starting point if you want to catch sentence-level errors in a chapter while keeping all narrative decisions yourself. ProWritingAid is a stronger fit if you also want to investigate repeated wording, sentence rhythm, or why a chapter feels slow. Neither tool can decide whether a character's unusual phrasing belongs in the book.

This comparison uses the vendors' published documentation and prices checked November 4, 2026. The example is an editorial exercise; we did not run a manuscript through either product.

Compare the same editing pass

Grammarly: a focused sentence pass

Use Grammarly when the draft already has the right scenes and you want a final pass for accidental errors. Grammarly Pro support describes full-sentence rewrites and tone suggestions. For fiction, review those suggestions against the point of view before accepting them. A clearer sentence can still reveal something the narrator shouldn't know.

The browser Editor's upload limit is 100,000 characters including spaces and 4 MB. Its support page distinguishes that from the Windows and Mac integrations, where the text editor can set the document limit. It also lists account-wide checking limits of 300 documents or 150,000 words in 30 days. Work from chapter copies and budget a second pass rather than assuming the whole book will fit in one upload.

ProWritingAid: investigate a recurring problem

Use ProWritingAid when you can name a pattern to investigate. For example, run its repeat report if the narrator keeps leaning on the same verb, then check whether the repeats cluster within a scene or recur deliberately as a motif. A sentence length report can help locate a stretch of monotonous rhythm. In a chase scene, though, short sentences may be doing exactly what you want.

The plan comparison distinguishes the 500-word free editing limit from paid line editing without that cap. That doesn't mean all paid features accept a whole novel. The Chapter Critique guide caps a critique at 6,000 words and recommends at least 500. Premium includes one critique per day; Premium Pro includes 30. For a story arc that spans chapters, Manuscript Analysis uses a separate Story Credit, including for subscribers. Check the credit cost before budgeting for repeat analyses after revisions.

What the paid plans cost

These are the USD prices listed by Grammarly support and on ProWritingAid's pricing page for one writer. Confirm the currency, tax, and renewal amount at checkout.

A monthly plan may be enough for a short revision window. A writer who needs four months of ProWritingAid Premium would spend $120 at the listed monthly price, the same as the listed year. Whole-manuscript Story Credits are outside that calculation. If you only need to compare basic corrections on a sample, use the free plans; there is no need to start a timed paid-plan trial.

A one-scene evaluation before buying

1. Copy the same permitted excerpt into both tools. Use up to 500 words if comparing free tiers. Pick a scene with narration and dialogue, not an unusually tidy opening paragraph.
2. Write a small voice sheet before reviewing suggestions: character spellings, intentional fragments, dialect, tense, and one repeated phrase you mean to keep.
3. Put each suggestion into one of three groups: fix an error, consider an optional change, or keep the original. For example, in No light. No footfall. Not yet., the fragments may carry the scene's rhythm. A sentence-count report can help you spot the pattern without telling you to remove it.
4. Read the revised passage aloud. Check that the narration still knows only what the viewpoint character knows and that each speaker sounds distinct. If a suggestion changes either, reject it and note why.

Choose Grammarly if the useful changes mostly correct local errors and fit your drafting app. Choose ProWritingAid if the reports repeatedly help you find problems you'd otherwise miss across chapters. If the excerpt leaves you with questions about motivation or scene order, review those issues before paying for a line-editing upgrade. Open the Grammarly card or ProWritingAid card and try that one-scene pass first. If you instead need to rewrite release notes, see our short product-update guide.