Best for
Best for individuals and teams who want grammar, clarity and tone help across every app they write in.
- Freelancers
- Small and mid-sized
- Enterprise
Writing Assistance & Style Comparison
Grammarly vs. Readable
At a glance
At a glance
Best for
Best for marketers, writers and public-sector teams who must show that their text is readable for a general audience, page by page or across a whole site.
- Freelancers
- Small and mid-sized
Cataleo does not name a winner. Both statements come from the vendors themselves.
Full Comparison
| Criterion | Grammarly | Readable |
|---|---|---|
| Starting price | Free tier; Pro from $12 / user / month $12 per member per month billed annually, $30 billed monthly. Enterprise is custom. | lower value $8 / month ContentPro, one user and one website, billed monthly; annual billing is also offered |
| Free trial | Free tier with 100 AI prompts per month | 7-day free trial on every plan |
| Commercial use | Yes | Not stated |
| Output | Grammar, clarity and tone suggestions, plus generative AI drafts | Readability grade level, a Readable A-E rating and a reach figure, plus highlighted style issues |
| Hosting | Not stated | Cloud web app |
| What it works on | Emails, documents, business and academic writing | Pasted text; Word, PDF, ODF and Markdown files; spreadsheets; emails; single URLs and entire websites |
| Checks covered | Spelling, grammar and punctuation corrections and tone detection on the free plan. Pro adds full-sentence rewrites, fluency, inclusive language, citation consistency, AI-text detection and plagiarism detection | Readability on 17 algorithms including Flesch-Kincaid, Gunning Fog, SMOG and Coleman-Liau, plus spelling and grammar, passive voice, adverbs, clichés, buzzwords, hedge words, profanity, gendered language and keyword density |
| Style guide and tone | Yes, brand tone and style guide (unlimited on Enterprise) | A custom dictionary for brand terms, adjustable sentence and word length thresholds, a UK or US English setting, and formality analysis for tone |
| Scores and reports | Yes, writing performance score and tone detection | Grade level from established formulas, a proprietary Readable A-E rating, a reach figure for the share of readers who can understand the text, sentiment, and branded reports |
| AI rewriting | Yes, generative AI prompts, rewrites and tone adjustments | No, the vendor states Readable uses no AI or LLMs in any layer of its services; it highlights passages to edit and leaves the rewriting to the writer |
| Languages | English with American, British, Canadian, Australian and Indian spelling and grammar, plus spelling and basic grammar in more than 20 further languages. Advanced suggestions and paragraph rewrites cover Spanish, French, German, Portuguese and Italian, and paid plans translate into 19 languages | English, localised for the UK, US, Canada, Australia, New Zealand and Ireland |
| Where it runs | Browser extensions for Chrome, Safari, Firefox and Edge, desktop apps for Windows 10 or newer and macOS 11 or newer that also reach Word, Outlook, PowerPoint and Teams, and mobile apps for iOS 17 and Android 9 or newer | Web app in the browser, website scoring for whole sites, and an API for adding scores to other software |
| Privacy and data handling | Content is not sold or used for advertising, and is stored on AWS in US data centres, encrypted in transit and at rest. A Product Improvement and Training control is on by default for individuals and can be switched off; on team accounts only admins change it. SOC 2 Type 2 and ISO 27001 certified, and Enterprise adds confidential mode, data loss prevention and its own encryption keys | Uploaded content belongs to the customer and can be deleted once scoring is complete; the vendor states no content is shared with any AI or LLM system, and additional data retention controls are available |
| Teams and sharing | Yes, team analytics, snippets and shared style guide | ContentPro covers one user, CommercePro three and AgencyPro five, with further users and websites added for a monthly fee; alerts and branded reports are included in the feature list |
| API | No public API; the Text Editor SDK for developers was discontinued in 2024 | Readable API with 50,000 requests per month on AgencyPro, further usage billed at $1 per 5,000 requests |
| AI features | stated Yes | No |
| Deployment | Cloud (SaaS), Browser-based | Cloud (SaaS), Browser-based |
| Support | Email helpdesk | Email helpdesk |
| Onboarding | Documentation and knowledge base | Documentation and knowledge base |
| Company size | more entries Freelancers, Small and mid-sized, Enterprise | Freelancers, Small and mid-sized |
| Integrations | more entries Gmail, Google Docs, Microsoft Word, Salesforce, Zendesk, Jira, LinkedIn, X, Facebook, Instagram, YouTube, Medium, Google Chrome, Safari, Firefox, Microsoft Edge | Dropbox, Slack |
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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
- Starting price Grammarly Free tier; Pro from $12 / user / month Readable $8 / month
- Free trial Grammarly Free tier with 100 AI prompts per month Readable 7-day free trial on every plan
- Company size Grammarly Freelancers, Small and mid-sized, Enterprise Readable Freelancers, Small and mid-sized
- AI features Grammarly Yes Readable No
- Output Grammarly Grammar, clarity and tone suggestions, plus generative AI drafts Readable Readability grade level, a Readable A-E rating and a reach figure, plus highlighted style issues
Every line is one datapoint from the table above, picked automatically. Nothing here is written text.
The trade-offs
Strengths and Limitations
Grammarly
Strengths
- Free tier is genuinely useful for everyday writing
- Works across apps and browsers through extensions
- Brand tones and style guides keep a consistent voice
Limitations
- Generative AI is capped by monthly prompt limits
- Enterprise pricing is custom, not published
Readable
Strengths
- Scores entire websites and URLs, not only a pasted draft
- Reports grade level from many established formulas side by side
- Uses no AI and shares no content with AI systems
- Pay as you go with no minimum term and no cancellation fee
Limitations
- Checks English only
- API access needs the AgencyPro plan
- Flags problems but does not suggest rewrites
- Payment by credit card only
Plans
Pricing
Grammarly
- Free $0 100 AI prompts per month, mistake-free writing and tone detection.
- Pro $12 Per member per month billed annually. $30 billed monthly. 2,000 AI prompts per month, full-sentence rewrites, tone adjustment and brand consistency.
- Enterprise Custom Contact sales. Unlimited members and unlimited generative AI prompts, plus confidential mode, granular roles and permissions, data loss prevention and dedicated support.
Readable
- ContentPro $8 / month One user and one website, billed monthly; annual billing is also offered.
- CommercePro $48 / month Three users and three websites, billed monthly; $24 / month when billed annually at $288.
- AgencyPro $138 / month Five users and the Readable API with 50,000 requests a month, billed monthly; $69 / month when billed annually at $828.
What users say
Review Scores · opens after launch
Grammarly
- 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. Nothing has been published here yet, and no score is shown. How a review is checked before it appears is described below.
Readable
- 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. Nothing has been published here yet, and no score is shown. How a review is checked before it appears is described below.
How we check reviews
Reviews are not published yet. The form on a tool's page works and reaches us, but nothing from it appears on this site, so no score here is based on a review. The rules below are the ones that will apply once reviews go live.
Every review is read by a person before it appears. We require a working email address and use it to come back to the author, so a review has a reachable sender rather than being anonymous. We publish positive and negative reviews alike, we pay nothing and offer nothing for a review, and we accept none that was bought or incentivised.
What we cannot do is verify a purchase. There is no shop here and no account, so whether the author really used the tool rests on what they tell us, plus the plausibility of what they write. We say so rather than implying a check that does not exist.
A vendor cannot have a review removed, cannot buy one, and cannot have one changed. Paid placement and a paid listing have no effect on which reviews appear or on any score.
Where this comes from
Where this comes from
Grammarly https://www.grammarly.com · checked against the official source on 2026-10-10
Readable https://readable.com · checked against the official source on 2026-10-10
This table lists factual criteria taken from information the vendors publish themselves. For how we put it together, see the methodology.