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. NovelAI
At a glance
At a glance
Best for
Best for novelists and interactive-fiction writers who need a story's own lore held in context.
- Freelancers
Cataleo does not name a winner. Both statements come from the vendors themselves.
Full Comparison
| Criterion | Lex | NovelAI |
|---|---|---|
| Starting price | Not stated | Tablet $10 / month Scroll is $15 and Opus $25 a month. Every tier includes unlimited text generation and text to speech. |
| Free trial | Free plan available | Trial of 30 image generations, no permanent free tier |
| Commercial use | Yes | Not stated |
| Output | Written documents | Long-form fiction and anime images |
| Content types | Documents, from quick notes to long drafts | Long-form fiction and interactive text adventure |
| Brand voice | Yes, Style Guides learn your voice from writing samples you supply, with larger guides on the paid plan | No brand-voice profile. Prebuilt Style, Theme and Inspiration modules steer prose toward a genre or an author's body of work, and Phrase Bias raises or lowers the odds of chosen words; training new custom modules is no longer supported |
| 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 content score. The editor shows token probabilities behind each generated token instead, which reports the model's confidence rather than the quality of the text |
| Drafting tools | Yes, AI feedback on drafts, rewriting, brainstorming, word-choice commands and title suggestions | Lorebook, Memory, Author's Note, Text Adventure mode, modules and sampling presets |
| Templates | Shared templates and prompts, on the Lex Teams add-on | A story exports as a .scenario file carrying tags, a description and user-defined placeholders, so importing it reopens the story as a customisable starting point |
| Team workflows | Yes, real-time collaboration, a comment system and version control | Built for one writer. Work moves between accounts as files rather than seats: .story and .scenario for stories, .json, .lorebook or an image with the data embedded for Lorebooks |
| API | Yes, a documented REST API | In-app scripting rather than a public HTTP API. Extensions are TypeScript scripts running sandboxed in a Web Worker, and they cannot make network requests |
| Deployment | Cloud (SaaS), Browser-based | Cloud (SaaS), Browser-based |
| Support | Email helpdesk, Community forum | Not stated |
| Onboarding | Documentation and knowledge base | Documentation and knowledge base |
| Company size | more entries Freelancers, Small and mid-sized | Freelancers |
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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 NovelAI Trial of 30 image generations, no permanent free tier
- Company size Lex Freelancers, Small and mid-sized NovelAI Freelancers
- Output Lex Written documents NovelAI Long-form fiction and anime images
- Content types Lex Documents, from quick notes to long drafts NovelAI Long-form fiction and interactive text adventure
- Brand voice Lex Yes, Style Guides learn your voice from writing samples you supply, with larger guides on the paid plan NovelAI No brand-voice profile. Prebuilt Style, Theme and Inspiration modules steer prose toward a genre or an author's body of work, and Phrase Bias raises or lowers the odds of chosen words; training new custom modules is no longer supported
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
NovelAI
Strengths
- Unlimited text generation on every tier
- Lorebook, Memory and Author's Note keep a long story consistent
- Text Adventure mode for interactive fiction
- One subscription covers both the writing and the image side
Limitations
- No permanent free tier, only a trial of 30 image generations
- Context size is what the tiers gate, so a long story pushes you to the top plan
- Image generation runs on a monthly Anlas allowance rather than being unlimited
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.
NovelAI
- Tablet $10 Per month. Unlimited text generation and text to speech, 1,000 subscription Anlas.
- Scroll $15 Per month. Larger context than Tablet, 1,000 subscription Anlas.
- Opus $25 Per month. Context up to 28,672 tokens, 10,000 subscription Anlas, and free image generation within size and step limits.
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.
NovelAI
- 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
NovelAI https://novelai.net · 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.