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Updated 4 September 2026 · Independent comparison

Grammarly vs Sudowrite:
which should you use?

Grammarly and Sudowrite, side by side. Find the one that fits what you need to do.

Find your best fit

The 30-second answer

Grammarly is built for writing, communication & language. Sudowrite built for long fiction: it holds a story bible, keeps characters consistent across chapters, and suggests rather than replaces.

Pricing, simplified

Start free. Upgrade when you need more.

1 of 2 have a free plan 0 of 2 prices re-read automatically · how we know No paid placement

The 30-second comparison

If you only read one section, make it this one. Rows where both sides say the same thing are left out — the point is where they differ. Where each row came from is listed underneath.

Grammarly and Sudowrite side by side, with the better fit for each row.
CategoryGrammarlySudowriteBetter fit
What it's built forWorks inside the apps you already write in rather than a separate window, which is why it actually gets used. Grammar, tone and clarity in place.Built for long fiction: it holds a story bible, keeps characters consistent across chapters, and suggests rather than replaces.Grammarly
Fit for writing, communication & languageBuilt for thisStrong fitGrammarly
Free planYes. Free tier: writing without spelling and grammar mistakes, tone detection, and 100 AI prompts for generating textNo. Paid from the start.Grammarly
Cheapest way to pay$30 a month.$19 a month.Sudowrite
What the paid tiers cost
  • One person, from $30/month
  • Enterprise, priced on request
  • One person, from $19/month
Tie
What to watch out forBetter at fixing than composing. It smooths writing toward a neutral register, which is not always what you want. The free tier caps generation at 100 AI prompts, and the enterprise tier now arrives through Superhuman Go rather than as Grammarly itself.Paid from the start, though the trial takes no card. The tiers differ mainly by monthly credits — 225,000, one million and two million — rather than by features, so the question is how much you write. Prose has a recognisable register you will want to edit out.Tie
Who it is usually forstudents, working professionalsworking professionalsTie
Made byGrammarly — San Francisco, US.Sudowrite — San Francisco, US.Tie

Grammarly is ahead on 3 of the 8 rows compared, 3 of them about how well it does the job itself, against 1 to Sudowrite. That is a clear lead rather than a tiebreaker.

Overall pick

Grammarly

Works inside the apps you already write in rather than a separate window, which is why it actually gets used.

✓ The job is mainly writing, communication & language ✓ Works inside the apps you already write in rather than a separate window, which is why it actually gets used. ✓ You want to start without paying anything ✓ You are among students
Choose Sudowrite instead if…

Built for long fiction: it holds a story bible, keeps characters consistent across chapters, and suggests rather than replaces.

Sudowrite is the better answer when the job is what it was built for rather than what the pick above does broadly.

✓ Built for long fiction: it holds a story bible, keeps characters consistent across chapters, and suggests rather than replaces. ✓ You want the cheaper paid plan, $19 against $30 ✓ It works in a browser with nothing to set up ✓ It is aimed at working professionals

How we know

Every row that separated these two, and where it came from. Nothing here is a hands-on test — if a line rests on a vendor’s own pricing page, it says so and links it.

The 4 rows that decided this page, with the source for each.
RowFavoursWeightWhere it came from
What it's built forGrammarlyHow well it does the jobFrom this site’s own catalogue record for each product — compiled by hand, not imported. How a product gets listed
Fit for writing, communication & languageGrammarlyHow well it does the jobBoth products are listed under writing, communication & language in the catalogue, and this is the fit recorded against each listing. Everything listed under writing, communication & language
Free planGrammarlyHow well it does the jobFrom each vendor’s own pricing page. Dates and pages are listed below.
Cheapest way to paySudowriteEverything elseFrom each vendor’s own pricing page. Dates and pages are listed below.

The prices

Grammarly. Read by hand off grammarly.com on 4 September 2026. It is not on the monthly re-check, so confirm there before paying. grammarly.com/plans

Sudowrite. Read by hand off sudowrite.com on 4 September 2026. It is not on the monthly re-check, so confirm there before paying. sudowrite.com/pricing

The ratings

The category these two share. Writing, Communication & Language — both are listed there in the catalogue, and the fit recorded against each listing is a judgement made here, by hand.

The nine-category grid below. Derived from what each product is listed for, by one script, once per build — so the same pair always reads the same. It is a derivation, not a review.

What this is not

Neither product was run side by side to produce this page. Nobody was paid to appear on it and nothing here is ranked by commission.

To put the same question to both and read the answers yourself, run them side by side — that is a live test, and this is not.

Choose based on what you’re doing

All ten categories, including the ones where neither of these is the answer. These ratings are derived from what each product is listed for, not from running it — a rating here is a reading of the record, and the record is linked.

01

General-Purpose AI Assistants

Questions, brainstorming, explanations, everyday tasks, decision-making, general advice.

Grammarly
Not a good fit
Sudowrite
Not a good fit
Best choice: Neither
02

Search, Research & Academics

Web research, deep research, books, academic papers, citations, news, fact-checking.

Grammarly
Not a good fit
Sudowrite
Not a good fit
Best choice: Neither
03

Writing, Communication & Language

Emails, reports, essays, editing, summarizing, translation, presentations.

Grammarly
Built for this
Sudowrite
Good fit
Best choice: Grammarly
04

Coding, Data & Technical Work

Programming, debugging, data analysis, spreadsheets, math, engineering, technical research.

Grammarly
Bad fit
Sudowrite
Bad fit
Best choice: Neither
05

Business, Finance & Professional Work

Business strategy, investing, market research, legal, sales, HR, accounting, consulting.

Grammarly
Not a good fit
Sudowrite
Not a good fit
Best choice: Neither
06

Image & Design

Image generation, photo editing, logos, graphics, product design, advertising creatives.

Grammarly
Bad fit
Sudowrite
Bad fit
Best choice: Neither
07

Video

Video generation and editing, clipping, subtitles, avatars, animation and motion capture.

Grammarly
Bad fit
Sudowrite
Bad fit
Best choice: Neither
08

Audio, Voice & Music

Voice generation, transcription, music, dubbing, sound cleanup and podcast production.

Grammarly
Bad fit
Sudowrite
Bad fit
Best choice: Neither
09

Marketing & Content Creation

Social media, SEO, advertising, copywriting, content ideas, scripts, brand development.

Grammarly
Not a good fit
Sudowrite
Not a good fit
Best choice: Neither
10

Productivity, Automation & Personal Life

AI agents, workflows, scheduling, meetings, organization, shopping, travel, personal finance.

Grammarly
Not a good fit
Sudowrite
Not a good fit
Best choice: Neither
Pick Grammarly if

Works inside the apps you already write in rather than a separate window, which is why it actually gets used.

San Francisco, US
The job is mainly writing, communication & language
Works inside the apps you already write in rather than a separate window, which is why it actually gets used.
You want to start without paying anything
You are among students
Pick Sudowrite if

Built for long fiction: it holds a story bible, keeps characters consistent across chapters, and suggests rather than replaces.

San Francisco, US
Built for long fiction: it holds a story bible, keeps characters consistent across chapters, and suggests rather than replaces.
You want the cheaper paid plan, $19 against $30
It works in a browser with nothing to set up
It is aimed at working professionals

Pricing, simplified

The plans people actually compare, read from each vendor’s own page.

PricingSimple, up-to-date plan overview.
Grammarlyby Grammarly
Sudowriteby Sudowrite
Free version
Grammarly
Yes — Free plan availableWriting without spelling and grammar mistakes, tone detection, and 100 AI prompts for
Sudowrite
No — paid from the startPaid from the start
Individual plans
Grammarly
Pro $30 / month$12 / month (annual)
Sudowrite
Hobby & Student $19 / month$10 / month (annual)
Professional $29 / month$22 / month (annual)
Max $59 / month$44 / month (annual)
Business plans
GrammarlyNot sold to teams
SudowriteNot sold to teams
Enterprise
Grammarly
Custom pricing
SudowriteNot published
View full details
GrammarlyView Grammarly pricing
SudowriteView Sudowrite pricing
Interactive

Tell us what you use AI for

Pick your main job and the verdict below changes to match. Every answer is on the page already, so this works as a reader, not a lookup.

The verdict for that job
Grammarly
Grammarly. It is built for writing, communication & language; Sudowrite does it well without it being its focus; only Grammarly has a free plan; Sudowrite is cheaper to start paying for, $19 against $30.
8 rows compared

Frequently asked questions

Is Grammarly or Sudowrite better?

Grammarly is ahead on 3 of the 8 rows compared, 3 of them about how well it does the job itself, against 1 to Sudowrite. That is a clear lead rather than a tiebreaker. Grammarly is built for writing, communication & language; Sudowrite does it well without it being its focus; only Grammarly has a free plan; Sudowrite is cheaper to start paying for, $19 against $30. Grammarly: Works inside the apps you already write in rather than a separate window, which is why it actually gets used. Grammar, tone and clarity in place. Sudowrite: Built for long fiction: it holds a story bible, keeps characters consistent across chapters, and suggests rather than replaces.

Is Grammarly or Sudowrite cheaper?

Sudowrite — paid plans start at $19 a month against $30 a month.

Do Grammarly and Sudowrite both have free plans?

Grammarly does — Free tier: writing without spelling and grammar mistakes, tone detection, and 100 AI prompts for generating text. Sudowrite does not.

What should I watch out for?

Grammarly: Better at fixing than composing. It smooths writing toward a neutral register, which is not always what you want. The free tier caps generation at 100 AI prompts, and the enterprise tier now arrives through Superhuman Go rather than as Grammarly itself. Sudowrite: Paid from the start, though the trial takes no card. The tiers differ mainly by monthly credits — 225,000, one million and two million — rather than by features, so the question is how much you write. Prose has a recognisable register you will want to edit out.

Read more

Grammarly

What it is for, who makes it, what it costs and what to use instead.

Sudowrite

What it is for, who makes it, what it costs and what to use instead.

Best AI for Writing

Emails, reports, essays, editing, summarizing, translation, presentations.

How we compare AI tools
Every row is generated from the same record the rest of the site is built on, so this page cannot drift from what we say elsewhere. We separate winner, tie and depends rather than forcing each category into a ranking, and we drop rows where both sides say the same thing. A pick is only called an overall pick when it leads on rows about how well the tool does the job; a lead that rests on price or audience alone is labelled as one. Nothing here is a hands-on test — how we know lists the source and date behind every deciding row.