# Concentration vs Grammarly

Concentration records 0 monthly visits with — month-over-month growth and Free pricing. Grammarly records 58,867,412 monthly visits with -1.5% growth and Freemium pricing.

| Metric | [Concentration](https://openaitools.app/tool/concentration) | [Grammarly](https://openaitools.app/tool/grammarly) |
| :--- | :--- | :--- |
| Website URL | https://chrome.google.com/webstore/detail/concentration/jkilnegoiabelpjhljiagmmnnppdaajf | https://www.grammarly.com |
| Categories | AI Productivity Tools, Large Language Models (LLMs), AI Chatbot, AI Assistant | AI Writing Assistants, AI Writing, AI Grammar Checker, AI Text Generator |
| Pricing Model | Free | Freemium |
| Monthly Visits | 0 | 58,867,412 |
| MoM Growth Rate | — | -1.5% |
| Primary Market | Global | United States |
| Direct Visits | 0 | 25,398,749 |
| Review Score | 4.2 | 4.4 |
| Saved Count | 3 | 74 |
| Supported Platforms | Browser Extension | Website |

## Concentration

Concentration is a lightweight Chrome extension built around a simple idea: instead of maintaining a hand-written blocklist, you describe the kinds of sites you want to avoid and let AI decide which pages match. You enable the extension, open its popup, and submit one or more topic keywords — for example "gaming", "streaming" or "movie". From then on, when you browse, Concentration evaluates the sites you visit against those keywords and blocks the ones that fit.

The extension offers two engines. Strict Mode relies on natural-language processing: it is fast but occasionally less precise. GPT Mode routes the same judgement through ChatGPT, which is slower but more accurate. You can switch between the two at any time, and you can remove keywords individually or reset the list entirely. Because the keywords are topical rather than tied to fixed domains, the blocker adapts to new and unfamiliar sites without any manual list maintenance.

Concentration is free to use and, according to its Chrome Web Store listing, does not require a paid ChatGPT subscription. The listing (version 2.01, updated September 22, 2023) reports a 4.6-star average from about 20 ratings and roughly 228 users. The developer states that collected data on web history, user activity and website content is not sold to third parties.

**Pricing & Plans:** Free. Concentration is offered at no charge and, per the Chrome Web Store listing, does not require a paid ChatGPT subscription to use its GPT Mode.

- **Keyword-based blocking:** Enter topical keywords such as "gaming" or "movie" and the extension blocks pages that match them, so you never have to curate a fixed domain blocklist.
- **NLP vs ChatGPT modes:** Switch between Strict Mode, which uses faster NLP classification, and GPT Mode, which uses ChatGPT for greater accuracy on ambiguous pages.
- **Simple keyword management:** Submit keywords one at a time, remove them individually with an ✗ control, or wipe the whole list with a single Remove All action.
- **No paid AI plan required:** The developer states you do not need a paid ChatGPT subscription to use the extension's ChatGPT-powered mode.
- **Lightweight Chrome footprint:** The extension ships as a small ~1.5 MiB package that runs quietly in the background and is controlled from a popup.

**Strengths:** Free with no required ChatGPT subscription; Keyword-based logic adapts to new sites without maintaining a blocklist; Two engines let you trade speed for accuracy; Very small download footprint (~1.5 MiB)

**Limitations:** Last updated September 2023, so it does not track newer Chrome or GPT APIs; Small user base and only ~20 ratings, so reliability signals are thin; Keyword blocking can over-block legitimate pages that mention a topic

[Profile (Markdown)](https://openaitools.app/tool/concentration.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 Concentration and Grammarly compare in monthly traffic?

Concentration has 0 monthly visits, while Grammarly has 58,867,412. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

Concentration has a month-over-month growth rate of —; Grammarly has -1.5%.

### How does pricing compare?

Concentration: Free. Free. Concentration is offered at no charge and, per the Chrome Web Store listing, does not require a paid ChatGPT subscription to use its GPT Mode. 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 | [Monica](https://openaitools.app/tool/monica-ai) | 4,512,775 | -11.3% | Freemium | All-in-one AI assistant across web, browser, desktop and mobile | [.md](https://openaitools.app/tool/monica-ai.md) |
| 5 | [Sider](https://openaitools.app/tool/sider) | 2,644,740 | -10.6% | Freemium | AI sidebar and browser agent for reading, writing and research | [.md](https://openaitools.app/tool/sider.md) |
| 6 | [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) |
| 7 | [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) |
| 8 | [AIPRM](https://openaitools.app/tool/aiprm) | 708,870 | -6.9% | Freemium, Paid | A prompt library and management layer for ChatGPT and other AI models | [.md](https://openaitools.app/tool/aiprm.md) |
| 9 | [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) |
| 10 | [HARPA AI](https://openaitools.app/tool/harpa-ai) | 537,461 | +99.3% | Freemium | One browser agent that combines every major AI model with web automation | [.md](https://openaitools.app/tool/harpa-ai.md) |

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

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