Sudowrite vs ProWritingAid (2026): Which Do You Need?

Sudowrite and ProWritingAid are not two versions of the same tool. Sudowrite is an AI writing partner: it drafts, rewrites, describes and brainstorms fiction for you, and runs on monthly credits. ProWritingAid is an editing checker: it reviews the prose you wrote for grammar, style, pacing and repetition, with paid whole-manuscript reports on top.

So the choice depends on the job. If you want help producing words, choose Sudowrite. If you want help cleaning up words you already have, choose ProWritingAid. Some writers pay for both.

StoryWith AI is our own product, so weigh what we say about it accordingly.

Key takeaways

• Sudowrite generates and rewrites prose with its own fiction models and more than 30 others. Plans run $10, $22 or $44 a month billed yearly, as listed on 22 October 2026.
• ProWritingAid checks and explains your prose with 25+ reports and says "we'll never write it for you." Premium is $10 a month billed yearly; Premium Pro $12, as listed on 22 October 2026.
• Whole-manuscript feedback costs extra on ProWritingAid: one Story Credit per report, from $25 to $50 for a single credit depending on plan, less in packs. On Sudowrite, Feedback is included on the Professional and Max plans.
• ProWritingAid works inside Word, Scrivener, Google Docs and browsers. Sudowrite is a web app with a companion mobile app.
• Both say they do not train AI on your writing.
• If you plan to publish, check Amazon KDP's rules on AI-generated text before drafting with Sudowrite.

What is the difference between Sudowrite and ProWritingAid?

Features as listed on sudowrite.com, Sudowrite's pricing page, prowritingaid.com and ProWritingAid's pricing page on 22 October 2026.

What does Sudowrite do?

Sudowrite's homepage describes Write as "autocomplete on steroids" that "suggests the next 300 words in your voice." Rewrite is "the super-flexible, infinitely-tenacious revision buddy," and Expand "builds out your scenes." Story Bible "takes you step-by-step from idea, to outline, to beating out chapters, to 1,000s of words, in your style."

Feedback "gives you five actionable areas to improve." Sudowrite's help centre (updated 13 May 2026) lists it on Professional and Max only, and says it can run on a scene, a chapter or the whole book.

Sudowrite runs its own fiction models. It promotes "Muse 1.5, our AI model built just for fiction," and its changelog (2 June 2026) calls Ballad "Sudowrite's second in-house model." The pricing page also lists "+30 industry-leading models."

Reviewers like the drafting help and warn about the learning curve. Jamie Biggs at The Write Practice (29 October 2025) wrote that "Sudowrite is not a replacement for creativity" and that "Opening Sudowrite for the first time can feel a little intimidating." Alex Morgan at UC Strategies (modified 26 June 2026), after testing it against ChatGPT across 70,000 words, called it "the best AI tool for fiction writers who prioritize prose quality and workflow integration," and added: "The question is whether its credit-based model fits your writing rhythm and budget."

What does ProWritingAid do?

ProWritingAid is a grammar checker and style editor with a long list of reports. Its features page promises "25+ reports to strengthen every line," including Overused Words, Repeats, Sentence Length, Readability, Sticky Sentences, Clichés, Dialogue, Pacing and Consistency.

Above the sentence level, it sells whole-manuscript reports for Story Credits. Its credits page says "It costs 1 credit to run Manuscript Analysis, Plot Analysis, Virtual Beta Reader, or Marketability Analysis," for a story up to 300,000 words. Its help centre says "We do not include credits with any of our subscriptions," apart from a one-time sign-up credit for new accounts.

ProWritingAid's homepage says "some features use assistive AI"; Rephrase and Sparks are the ones that suggest alternative wordings. Its Responsible AI page says "Some of our features use Large Language Models (LLMs) developed by leading providers in the field of generative AI," and promises "We will never use your writing to train our algorithms."

Elizabeth Nettleton at The Write Practice (modified 29 June 2026) tested the manuscript reports and wrote that "I actually found the Virtual Beta Reader more accurate than the Manuscript Analysis," and that "it cannot replace a human editor." Our ProWritingAid Manuscript Analysis review covers those reports in detail.

How much do Sudowrite and ProWritingAid cost?

Sudowrite

Yearly prices and credits as listed on Sudowrite's pricing page on 22 October 2026, which shows Professional's 1,000,000 credits as "2X as much!" over 450,000 with no end date stated. Monthly prices from Sudowrite's help article "What plans are available?" (updated 7 January 2026); expiry and rollover from "Do credits roll over?" (updated 8 January 2026).

Credits do not map to words. Sudowrite's help centre (updated 7 January 2026) says "there's no 1:1 relationship between the words you generate and the number of credits used." Cost depends on the feature and model: its example is a 200-word Write costing about 70 credits on one model and over 8,000 on another. Every plan offers a free trial with "No credit card, cancel anytime."

ProWritingAid

Prices as listed on ProWritingAid's pricing page and credits page on 22 October 2026. Credits "do not expire." Yearly and lifetime plans carry a "3-day money back guarantee"; monthly plans and credits are not refundable.

The free plan checks 500 words at a time, with "2 runs per line editing report per day."

What one novel costs on each

A hypothetical example for a 90,000-word draft. On ProWritingAid Premium billed yearly, a year of unlimited line reports is $120, and one Manuscript Analysis adds one credit at $35, so $155 for the year with one whole-book report. On Sudowrite Professional billed yearly, a year is $264, with Feedback included on that plan; Sudowrite's help centre does not say how many credits a Feedback run uses, and other features' credit costs vary with the model and length.

Which is better for revising a finished draft?

ProWritingAid, for the sentence work. It is built to review your own text and explain each flag, and it runs inside the editors novelists already use. For a story-level read, its Manuscript Analysis and Virtual Beta Reader are paid per run.

Sudowrite's Feedback and Rewrite help with revision too, but Rewrite changes the text by generating new wording. If you want every final sentence to be yours, that is a different kind of help.

Sudowrite's own comparison (Melody Emjay, 22 July 2025) agrees on the split: it says ProWritingAid "does not generate creative alternatives for entire paragraphs or scenes," and that Sudowrite "does not have built-in tools focusing on grammar and spelling," with a "yet" that suggests this may change. That post is the vendor's view, and it is older than Sudowrite's current Feedback types, which now include copy edits.

Which is better for drafting?

Sudowrite. Drafting is what it is for: Story Bible, Scenes and Draft take you from outline to prose, and Write continues a scene in your style. ProWritingAid's drafting help is lighter (Story Canvas, Outline Crafter, Creative Nudges and Sparks), and it does not draft chapters for you.

Before you draft with AI, check where you plan to publish. Amazon KDP's content guidelines (read on 22 October 2026) require you to tell KDP about AI-generated text, images or translations, even if you edited them heavily afterwards; our guide to AI-assisted vs AI-generated writing explains the difference KDP draws.

Integrations, files and privacy

From Sudowrite's help articles on importing and exporting (12 January 2026) and its pricing FAQ, and ProWritingAid's integrations and Responsible AI pages, read on 22 October 2026.

Who should choose which?

Based on features and prices as listed on each vendor's pages on 22 October 2026.

For alternatives to either, see our guides to Sudowrite alternatives and ProWritingAid alternatives. If Sudowrite's rival in your shortlist is Novelcrafter, our Sudowrite vs Novelcrafter comparison covers that pairing.

Where StoryWith AI fits

StoryWith AI sits between the two. Like ProWritingAid, it analyses the manuscript you wrote rather than writing it; text changes only when you ask for an edit and accept it. Unlike a line checker, it works at the story level: it returns Book Health, one ranked list of what to fix, sorted by severity, with each finding linked to the passage that caused it. Its analyzers cover structure, pacing, emotional arc, character arcs, dialogue, continuity and plot holes, readability, theme and scene purpose.

On our pricing page on 22 October 2026, Free is $0 with 50 one-time AI text actions, Author is $19 a month or $149 a year with 500 actions a month, and Pro is $39 a month or $299 a year with unlimited text actions. On our pricing page, one pass of the book-wide analyzers plus a full continuity scan on a 90,000-word, 75-scene novel uses about 18 actions; running the scene-level analyzers on every scene adds about 375 more. Our features page lists what each analyzer checks. Paid plans include reader sessions with real people you invite.

It is the wrong tool if you want AI to draft for you, which is Sudowrite's job, or if you want grammar and comma checks inside Word, which is ProWritingAid's. It has no grammar checker of that kind.

Frequently Asked Questions (FAQ)

Is Sudowrite better than ProWritingAid?

They do different jobs. Sudowrite is better for generating and rewriting fiction prose; ProWritingAid is better for checking grammar and style in prose you wrote. Many writers who use one for drafting use the other, or a human editor, for polishing.

Can ProWritingAid write a novel for me?

No. ProWritingAid's homepage says "we'll never write it for you." It does offer AI rewording tools, Rephrase and Sparks, that suggest alternatives for passages you have written.

Does Sudowrite check grammar?

Not as its focus. Sudowrite's July 2025 comparison post said it "does not have built-in tools focusing on grammar and spelling," and added "yet". Since then, its Feedback tool (Professional and Max) has added a Copy Edits type covering grammar, passive voice and punctuation, according to its help centre (updated 13 May 2026). It is still not an inline, sentence-by-sentence grammar checker in ProWritingAid's sense.

How much does Sudowrite cost compared with ProWritingAid?

As listed on 22 October 2026, Sudowrite is $10, $22 or $44 a month billed yearly ($19, $29 or $59 monthly). ProWritingAid Premium is $10 a month billed yearly or $30 monthly, and Premium Pro $12 or $36, with lifetime options at $399 and $699. Whole-manuscript reports on ProWritingAid cost Story Credits on top.

Do Sudowrite or ProWritingAid train AI on my writing?

Both say no. Sudowrite's pricing FAQ says "We do not use your writing to train Sudowrite or OpenAI's AI models," and ProWritingAid's Responsible AI page says "We will never use your writing to train our algorithms."

Can I use Sudowrite and ProWritingAid together?

Yes. A common pattern is to draft or expand scenes in Sudowrite, export to .docx, then run ProWritingAid's checks in Word or Google Docs. Read the result yourself before you treat either tool's output as final.

Do I have to disclose Sudowrite use on Amazon KDP?

Yes, if Sudowrite wrote the text. KDP's content guidelines (read on 22 October 2026) require you to disclose AI-generated content, meaning text an AI tool created "even if you applied substantial edits afterwards." You do not have to disclose AI-assisted content, such as text you wrote and then used AI to edit or refine. Check KDP's current guidelines before you publish.