# AIWriteBook vs Grammarly

AIWriteBook records 177,210 monthly visits with -10.6% month-over-month growth and Freemium, Free pricing. Grammarly records 58,867,412 monthly visits with -1.5% growth and Freemium pricing.

| Metric | [AIWriteBook](https://openaitools.app/tool/aiwritebook) | [Grammarly](https://openaitools.app/tool/grammarly) |
| :--- | :--- | :--- |
| Website URL | https://aiwritebook.com | https://www.grammarly.com |
| Categories | AI Book Writing, AI Creative Writing, AI Ebook Generator, AI Writing | AI Writing Assistants, AI Writing, AI Grammar Checker, AI Text Generator |
| Pricing Model | Freemium, Free | Freemium |
| Monthly Visits | 177,210 | 58,867,412 |
| MoM Growth Rate | -10.6% | -1.5% |
| Primary Market | United States | United States |
| Direct Visits | 55,281 | 25,398,749 |
| Review Score | 4.2 | 4.4 |
| Saved Count | 1 | 74 |
| Supported Platforms | Website | Website |

## AIWriteBook

AIWriteBook targets authors who want AI assistance without losing authorship. Instead of dumping a generic first draft on the page, the platform asks you to define your premise, build characters and structure your outline, then use a writing-style profile trained on your own prose so chapters stay consistent with how you actually write. A manuscript import feature lets you bring in an existing DOCX draft and have the tool map characters, plots and subplots into its project structure.

The tool covers the full production pipeline. Beyond drafting, it offers chapter-by-chapter AI chat and editing suggestions, grammar and style checks, illustration generation, a cover maker, professional formatting and a KDP publishing assistant with category research. A Book Translation module supports publishing in other languages, an Author Public Page gives you a landing page, and the Audiobook Studio converts a finished manuscript into a narrated audiobook.

Pricing runs on monthly credits with four tiers — Free, Plus, Pro and Ultra — with discounts for annual billing, plus a one-time option. The free tier covers roughly twelve pages of output, while higher tiers add explicit content support, non-fiction workflows, translation, audiobooks, visual books and book-series management. Ultra adds bring-your-own-API-key access to a broader model catalogue and priority support.

**Pricing & Plans:** Freemium with a permanently free tier (100 credits, about 12 pages). Paid plans are Plus at roughly $12/month, Pro at roughly $30/month and Ultra at roughly $120/month when billed yearly, plus a one-time purchase option. Credits reset monthly and the platform advertises a 7-day money-back window.

- **Voice-matching style engine:** Train the AI on samples of your own writing so generated chapters, dialogue and narration follow your established tone and quirks rather than a generic literary default.
- **Manuscript import and project mapping:** Upload an existing .docx draft and let the platform parse characters, plots and subplots into structured fields, which is useful for finishing a long-stalled project.
- **Chapter writing with inline AI editing:** Draft chapter by chapter, then ask for targeted rewrites or alternatives with explanations, so you keep creative control over what actually stays on the page.
- **Cover maker, formatter and KDP assistant:** Generate a cover, lay out the interior to print specifications and export files sized for Amazon KDP and KDP Print distribution.
- **Audiobook Studio and translation:** Convert a finished manuscript into a distributed-ready narrated audiobook and translate books into other languages for wider reach.

**Strengths:** Covers writing, editing, illustration, cover, formatting and KDP distribution in a single workflow instead of stitching tools together; Style-training and manuscript import make the AI output sound like the author rather than like a generic content generator; Transparent credit-based pricing with a genuinely usable free tier and an audiobook and translation path on higher plans; Strong public review volume on Trustpilot, AppSumo and Capterra, with 4.7/5 average reported on the site

**Limitations:** Credit consumption is tied to output length, so long manuscripts push you toward the higher tiers quickly; The breadth of features means a real learning curve before the workflow feels efficient; Audiobook narration, translation and visual books are gated behind Pro and above, not available on the entry plans

[Profile (Markdown)](https://openaitools.app/tool/aiwritebook.md)

## Grammarly

Grammarly is the world's most widely deployed AI writing and communication platform, trusted by more than 40 million daily users and 50,000 organizations including Atlassian, Databricks, and Zoom. Operating as a persistent overlay across over 500,000 web applications, desktop programs (Windows and macOS), Microsoft Office, Google Docs, and iOS/Android keyboards, Grammarly analyzes text in real time to eliminate grammatical errors, streamline wordy phrasing, and calibrate tone to match the writer's intent. Following its corporate evolution under the Superhuman Platform umbrella alongside Superhuman Mail and Coda, Grammarly has expanded from a personal proofreader into an enterprise-grade proactive AI communication suite.

In 2026, Grammarly goes well beyond red-underline spellchecking with a suite of specialized AI Agents and document integrity tools. Writers can invoke purpose-built agents—including AI Grader, Citation Finder, Reader Reactions, and Paraphraser—alongside generative AI drafting directly inline where they work. To address academic and professional transparency in the generative AI era, Grammarly offers built-in Plagiarism Detection, an AI Detector, and Grammarly Authorship, which tracks how a document was constructed by automatically categorizing text as human-typed, pasted from external sources, or generated/modified with AI. For teams, Grammarly enforces organizational consistency through custom Style Guides, Brand Tones, reusable Snippets, and Knowledge Share.

Grammarly simplified its subscription structure by consolidating its legacy individual 'Premium' and team 'Business' offerings into a single unified tier: Grammarly Pro. The Free plan ($0/month) covers essential spelling, punctuation, basic tone visibility, and 100 generative AI prompts per month. Grammarly Pro is priced at $12/member/month when billed annually ($144/year) or $30/member/month when billed monthly ($60 quarterly), unlocking unlimited personalized fluency suggestions, full-sentence rewrites, tone adjustment, citation formatting, plagiarism and AI detection, 1 team style guide, and 2,000 generative AI prompts per member each month. Large organizations opt for Grammarly Enterprise (available with Superhuman Go) for unlimited AI prompts, SAML SSO, SCIM provisioning, Data Loss Prevention (DLP), and Bring Your Own Key (BYOK) encryption.

**Pricing & Plans:** Free plan ($0/month) includes core grammar and spelling checks, tone detection, and 100 generative AI prompts/month; Grammarly Pro costs $12/member/month billed annually ($144/year, or $30/month billed monthly) with full-sentence rewrites, plagiarism/AI detection, team style guides, and 2,000 AI prompts/month, while Enterprise offers custom pricing with unlimited AI prompts and BYOK security.

- **Ubiquitous Inline Rewriting & Tone Calibration:** Works natively inside Chrome, Safari, Firefox, Edge, Windows, Mac, Google Docs, MS Office, and mobile keyboards to flag grammar mistakes, rewrite tangled sentences, and shift tone toward confident, empathetic, or executive registers.
- **Specialized AI Agents (AI Grader, Citation Finder & Reader Reactions):** Deploys contextual AI agents that predict how a target audience will react to a draft, locate credible supporting citations, grade essays against rubric criteria, and generate drafts using up to 2,000 monthly prompts on Pro.
- **Grammarly Authorship, AI Detector & Plagiarism Checker:** Scans text against billions of web pages and academic databases for accidental plagiarism, detects AI-generated passages, and logs transparent document provenance via Authorship reports in Google Docs and Word.
- **Team Style Guides, Brand Tones & Knowledge Share:** Enables teams on Pro and Enterprise plans to codify company terminology, ban deprecated jargon, enforce inclusive language, insert shared Snippets, and surface internal company definitions inline.
- **Enterprise Security, DLP & Superhuman Platform Governance:** Protects organizational data with SOC 2 Type 2 attestation, SAML SSO, SCIM lifecycle management, Confidential Mode, Data Loss Prevention controls, Audit Logs API, and customer-managed BYOK encryption.

**Strengths:** Frictionless cross-platform integration works inside virtually every browser, desktop app, email client, and mobile OS without copy-pasting into a separate chatbot.; Consolidating Premium and Business into Grammarly Pro ($12/member/month annual) gives individuals and small teams access to style guides, analytics, and plagiarism/AI detection in one plan.; Grammarly Authorship provides a constructive, transparent audit trail for students and writers to demonstrate human writing integrity alongside responsible AI editing.; Mature enterprise security posture featuring BYOK encryption, Data Loss Prevention, and granular application/domain blocklists.

**Limitations:** Month-to-month billing on Grammarly Pro is steep at $30/member/month compared to the $12/member/month annual commitment ($144 billed upfront).; Core writing intelligence and style rules remain primarily optimized for English dialects (US, UK, Canadian, Australian, Indian) rather than native multilingual grammar checking.; Aggressive inline underlines and pop-up agent cards can feel visually intrusive in dense technical documents or code-heavy web editors unless muted per domain.

[Profile (Markdown)](https://openaitools.app/tool/grammarly.md)

## Frequently Asked Questions

### How do AIWriteBook and Grammarly compare in monthly traffic?

AIWriteBook has 177,210 monthly visits, while Grammarly has 58,867,412. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

AIWriteBook has a month-over-month growth rate of -10.6%; Grammarly has -1.5%.

### How does pricing compare?

AIWriteBook: Freemium, Free. Freemium with a permanently free tier (100 credits, about 12 pages). Paid plans are Plus at roughly $12/month, Pro at roughly $30/month and Ultra at roughly $120/month when billed yearly, plus a one-time purchase option. Credits reset monthly and the platform advertises a 7-day money-back window. Grammarly: Freemium. Free plan ($0/month) includes core grammar and spelling checks, tone detection, and 100 generative AI prompts/month; Grammarly Pro costs $12/member/month billed annually ($144/year, or $30/month billed monthly) with full-sentence rewrites, plagiarism/AI detection, team style guides, and 2,000 AI prompts/month, while Enterprise offers custom pricing with unlimited AI prompts and BYOK security.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [DeepL](https://openaitools.app/tool/deepl) | 95,110,871 | -1.7% | Freemium | Outstanding for context-aware translation and professional writing refinement, but not designed as a dedicated grammar checker. | [.md](https://openaitools.app/tool/deepl.md) |
| 2 | [QuillBot Paraphraser](https://openaitools.app/tool/quillbot-paraphraser) | 36,630,337 | +2.3% | Freemium | Excels at heavy paraphrasing and text rewriting, but offers less seamless inline real-time proofreading across all apps. | [.md](https://openaitools.app/tool/quillbot-paraphraser.md) |
| 3 | [LanguageTool](https://openaitools.app/tool/languagetool) | 5,707,795 | -4.2% | Freemium | Provides strong multilingual grammar and style checking across apps, but offers fewer advanced generative AI features. | [.md](https://openaitools.app/tool/languagetool.md) |
| 4 | [ProWritingAid](https://openaitools.app/tool/prowritingaid-com) | 1,623,266 | +17.6% | Freemium, Paid | Delivers deeper manuscript analysis and structural reports, but has a steeper learning curve than Grammarly. | [.md](https://openaitools.app/tool/prowritingaid-com.md) |
| 5 | [Paperpal](https://openaitools.app/tool/paperpal) | 1,111,641 | +1.7% | Freemium | AI academic writing assistant that edits, cites, and checks your manuscript right where you write | [.md](https://openaitools.app/tool/paperpal.md) |
| 6 | [Hemingway Editor](https://openaitools.app/tool/hemingway-editor) | 605,169 | -8.6% | Free Trial, Paid, Free | Highlights readability and sentence complexity visually, but lacks automated grammar correction and browser-wide extension support. | [.md](https://openaitools.app/tool/hemingway-editor.md) |
| 7 | [Wordtune](https://openaitools.app/tool/wordtune) | 368,771 | -5.8% | Freemium, Free Trial | Great for sentence-level tone adjustments and rewriting, but less comprehensive for standalone grammar rules and style guides. | [.md](https://openaitools.app/tool/wordtune.md) |
| 8 | [Dabble](https://openaitools.app/tool/dabble-book-writing-software) | 286,774 | -26.3% | Free Trial, Paid | Provides exceptional plot and scene management tools for novelists, though it lacks fully automated AI chapter generation. | [.md](https://openaitools.app/tool/dabble-book-writing-software.md) |
| 9 | [HyperWrite](https://openaitools.app/tool/hyperwrite-ai) | 255,429 | +34.4% | Freemium | AI writing assistant with autocomplete, research, and a Chrome extension | [.md](https://openaitools.app/tool/hyperwrite-ai.md) |
| 10 | [Linguix](https://openaitools.app/tool/linguix) | 227,398 | -4.5% | Freemium | Offers similar inline grammar correction and snippets, but with a smaller ecosystem of browser extensions and integrations. | [.md](https://openaitools.app/tool/linguix.md) |

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Source: https://openaitools.app/compare/aiwritebook-vs-grammarly

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