Best for
Best for writers who want a clean editor with AI feedback built in.
- Freelancers
- Small and mid-sized
AI Writing Comparison
Lex vs. Sudowrite
At a glance
At a glance
Best for
Best for novelists and narrative writers working on long-form fiction.
- Freelancers
- Small and mid-sized
Cataleo does not name a winner. Both statements come from the vendors themselves.
Full Comparison
| Criterion | Lex | Sudowrite |
|---|---|---|
| Starting price | Not stated | From $19 / month Paid monthly; $10 per month paid annually. Plans are metered in credits. |
| Free trial | Free plan available | 7-day refund window on any plan, no free tier |
| Commercial use | Yes | Yes |
| Output | Written documents | Long-form fiction and narrative |
| Content types | Documents, from quick notes to long drafts | Long-form fiction and narrative |
| Brand voice | Yes, Style Guides learn your voice from writing samples you supply, with larger guides on the paid plan | Yes, matches your writing voice and style |
| Content scoring | No score and no readability rating. Lex answers with written feedback on a draft, and the published feature list carries nothing that returns a number | No numeric score. Feedback returns five concrete areas to improve on a draft instead |
| Drafting tools | Yes, AI feedback on drafts, rewriting, brainstorming, word-choice commands and title suggestions | Story Bible, Write, Describe, Expand, Rewrite, Canvas, Brainstorm, Visualize and Feedback. Runs on the Muse fiction model |
| Templates | Shared templates and prompts, on the Lex Teams add-on | No template library. A directory of over 1,000 community-built plugins adds task-specific tools such as reader simulation and character dialogue |
| Team workflows | Yes, real-time collaboration, a comment system and version control | Built for a single author. Share links give beta readers view-only access with comments they cannot see from each other, and series folders share characters, worldbuilding and outline across books |
| API | Yes, a documented REST API | No public API. Extensions are built as plugins inside Sudowrite |
| Deployment | Cloud (SaaS), Browser-based | Cloud (SaaS), Browser-based |
| Support | Email helpdesk, Community forum | Email helpdesk, Community forum |
| Onboarding | Documentation and knowledge base | more entries Documentation and knowledge base, Live online demos and webinars |
| Company size | Freelancers, Small and mid-sized | Freelancers, Small and mid-sized |
Add a tool
Adds a column to the table, from the tools in this category.
Row where the values differ The small markers point at the lower number, the longer list or the stated feature. They describe the data, they are not a verdict.
The short version
Key Differences
- Free trial Lex Free plan available Sudowrite 7-day refund window on any plan, no free tier
- Output Lex Written documents Sudowrite Long-form fiction and narrative
- Content types Lex Documents, from quick notes to long drafts Sudowrite Long-form fiction and narrative
- Brand voice Lex Yes, Style Guides learn your voice from writing samples you supply, with larger guides on the paid plan Sudowrite Yes, matches your writing voice and style
- Content scoring Lex No score and no readability rating. Lex answers with written feedback on a draft, and the published feature list carries nothing that returns a number Sudowrite No numeric score. Feedback returns five concrete areas to improve on a draft instead
Every line is one datapoint from the table above, picked automatically. Nothing here is written text.
The trade-offs
Strengths and Limitations
Lex
Strengths
- Distraction-free editor with AI feedback built into the document
- Real-time collaboration and comments included on the free plan
- Version control to compare alternative phrasings
Limitations
- No SEO or content-scoring features
- Fewer marketing templates than dedicated copy tools
- The largest AI models require the paid plan
Sudowrite
Strengths
- Purpose-built for fiction, better pacing, voice and character continuity than general tools
- Genuinely useful for novels
Limitations
- Fiction only, not for marketing or SEO
- Controversial among some writers
- Not a general-purpose tool
Plans
Pricing
Lex
- Free Free Includes real-time sharing and collaboration, on smaller AI models.
- Lex Pro Not stated Access to the largest AI models, larger Style Guides, early access to new features, the iOS app and priority support.
- Lex Teams Not stated An add-on alongside Pro: unlimited documents in shared folders, plus shared templates and prompts.
Sudowrite
- Hobby & Student $19 Per month, or $10 per month paid annually. 225,000 credits per month.
- Professional $29 Per month, or $22 per month paid annually.
- Max $59 Per month, or $44 per month paid annually. 2,000,000 credits per month, and unused credits roll over for 12 months.
- Enterprise Not stated On request.
What users say
Review Scores · opens after launch
Lex
- Ease of use
- Not rated yet
- User interface
- Not rated yet
- Onboarding
- Not rated yet
- Support and service
- Not rated yet
- Value for money
- Not rated yet
- Features
- Not rated yet
No reviews yet. Be the first to review this tool. Every review is checked for fairness before it appears, and the vendor cannot have one removed.
Sudowrite
- Ease of use
- Not rated yet
- User interface
- Not rated yet
- Onboarding
- Not rated yet
- Support and service
- Not rated yet
- Value for money
- Not rated yet
- Features
- Not rated yet
No reviews yet. Be the first to review this tool. Every review is checked for fairness before it appears, and the vendor cannot have one removed.
Where this comes from
Where this comes from
Lex https://lex.page · checked against the official source on 2026-09-03
Sudowrite https://www.sudowrite.com · no check date recorded yet
This table lists factual criteria taken from information the vendors publish themselves. For how we put it together, see the methodology.