Choose Grammarly if you want
Everyday proofreading across many apps.
The strongest all-round checker here, with a free plan and corrections across many apps. Its AI rewrites and agents sit behind the $12 Pro plan, and Enterprise pricing is not public.
Choose Sudowrite if you want
Fiction drafting and manuscript feedback.
Built for novels and screenplays, with chat, scene tools and a planning canvas. It has no free plan, and its fiction focus limits use for business or academic writing.
The main differences
- Only Grammarly runs on iOS.
- Only Grammarly runs on Android.
- Grammarly can be used for free; Sudowrite requires payment.
Side by side
 Grammarly |  Sudowrite | |
|---|---|---|
| Score | 91.0 | 79.0 |
| Rank in list | #1 of 6 | #5 of 6 |
| Price | Free plan, paid upgradesFree plan; Pro $12 a month with a 7-day trial; Enterprise by sales contact | SubscriptionHobby $10, Professional $22 and Max $44 a month, billed monthly or yearly |
| Free to use | Yes | No |
| Open source | No | No |
| Platforms | WebBrowser extensioniOSAndroidWeb, Browser extension, iOS, Android | WebWeb |
| Made by | Not stated | Not stated |
| Main focus | General writing in many apps | Fiction drafting |
| AI writing features | Yes, rewrites and text generation | Yes, chat and drafting |
| Story and plot tools | Not listed | Planning canvas |
| Team plans | Enterprise plan | Not listed |
| Best for | Everyday proofreading across many apps | Fiction drafting and manuscript feedback |
| Strengths |
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| Limits |
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| Links | Visit site | Visit site |
Questions about Grammarly vs Sudowrite
- Is Grammarly better than Sudowrite?
- Grammarly ranks higher in our list of AI writing assistants (#1 against #5, score 91.0 against 79.0). Grammarly is best for: everyday proofreading across many apps. Sudowrite is best for: fiction drafting and manuscript feedback.
- Which is cheaper, Grammarly or Sudowrite?
- Grammarly: Free plan; Pro $12 a month with a 7-day trial; Enterprise by sales contact. Sudowrite: Hobby $10, Professional $22 and Max $44 a month, billed monthly or yearly.
- Do Grammarly and Sudowrite run on the same platforms?
- Grammarly supports Web, Browser extension, iOS, Android. Sudowrite supports Web.