Grammarly
AI writing assistant that corrects, rewrites and tone-checks your text across every app
Freemium
Leonardo AI
AI image and video studio with custom model training and a real-time canvas editor
Freemium
Verdict
Grammarly is listed under AI Assistants and Leonardo AI under Image & Visual AI. Leonardo AI scores higher in FinderAtlas's editorial review (8.5 vs 8.2 out of 10), led by value for money. Both have a free plan or trial. Only Grammarly is available on Windows, macOS and Chrome Extension.
Best overall
Leonardo AI
- Game developers
- Concept artists
- Designers
- Marketers
Choose Grammarly if
- You want a tool built for polishing emails and documents in real time across many apps, keeping tone and style consistent across a team.
- Works across desktop, browser, Office, Google Docs and mobile keyboards, so suggestions follow you between apps.
- Free plan covers core grammar, spelling and tone visibility with 100 AI prompts per month.
Choose Leonardo AI if
- You want a tool built for game and concept art.
- Free plan with 150 tokens per day.
- Many first-party and third-party image and video models in one account.
- Best for beginners
- Leonardo AI
- Best for business
- Grammarly
Features
17 features compared.
- Citation ToolsGrammarlyAvailableLeonardo AINot available
- Style Guides and Brand TonesGrammarlyAvailableLeonardo AINot available
- Cross-App AvailabilityGrammarlyAvailableLeonardo AINot available
- Enterprise Security ControlsGrammarlyAvailableLeonardo AINot available
- Grammar and Mistake CorrectionGrammarlyAvailableLeonardo AINot available
- Tone Detection and AdjustmentGrammarlyAvailableLeonardo AINot available
- Full-Sentence and Paragraph RewritesGrammarlyAvailableLeonardo AINot available
- AI Detector and HumanizerGrammarlyAvailableLeonardo AINot available
- Plagiarism CheckerGrammarlyAvailableLeonardo AINot available
- AI CanvasGrammarlyNot availableLeonardo AIAvailable
- Multiple modelsGrammarlyNot availableLeonardo AIAvailable
- Personal model trainingGrammarlyNot availableLeonardo AIAvailable
- Video generationGrammarlyNot availableLeonardo AIAvailable
- BlueprintsGrammarlyNot availableLeonardo AIAvailable
- Image editing toolsGrammarlyNot availableLeonardo AIAvailable
- Mobile appsGrammarlyNot availableLeonardo AIAvailable
- API and MCP serverGrammarlyNot availableLeonardo AIAvailable
Pricing
Plans as listed by each vendor. Check their sites for current prices.
- Pricing modelGrammarlyFreemiumLeonardo AIFreemium
- Free planGrammarlyYesLeonardo AIYes
- Starting priceGrammarly$0Leonardo AI$0
- PlansGrammarly3 plansLeonardo AI4 plans
Grammarly plans
Free
$0
Basic writing help for individuals
- Mistake correction
- tone visibility
- 100 AI prompts/month
Pro
Most popular$30/month
Individuals and eligible teams wanting advanced rewrites and detection
- 2,000 AI prompts/member/month
- tone adjustment
- full-sentence rewrites
- plagiarism detection
- AI-generated text detection
- style guide
- brand tone
- priority support
Enterprise
Custom/custom
Larger organizations with security and governance needs
- Unlimited AI prompts
- unlimited style guides and brand tones
- SAML SSO
- SCIM
- audit logs API
- data loss prevention
- dedicated support
Leonardo AI plans
Free
$0
150 fast tokens per day with public creations
- 150 daily tokens
- Basic quality
- Public creations
- Presets
Essential
Most popular$12/month
8,500 fast tokens per month
- 8,500 monthly tokens
- Private creations
- Token rollover bank
- Personal model training
- Token top-up packs
Premium
$30/month
25,000 fast tokens per month
- 25,000 monthly tokens
- Unlimited relaxed image generation on Leonardo models
- Larger rollover bank
- More simultaneous generations
Ultimate
$60/month
60,000 fast tokens per month
- 60,000 monthly tokens
- Unlimited relaxed image and video generation on select models
- Largest rollover bank
- 6 simultaneous generations
Our ratings
Scored out of 10 by the Finder Atlas editorial team. Last reviewed October 2026.
- Grammarly
- 8.2overall
- Leonardo AI
- 8.5overall
Grammarly leads in 1 category and Leonardo AI in 1.
Ease of Use
Grammarly leads by 1.1- Grammarly
- 9.1
- Leonardo AI
- 8.0
Feature Depth
- Grammarly
- 8.3
- Leonardo AI
- Not rated
Value for Money
Leonardo AI leads by 0.5- Grammarly
- 7.3
- Leonardo AI
- 7.8
Performance & Speed
- Grammarly
- 8.4
- Leonardo AI
- Not rated
Documentation & Support
- Grammarly
- 8.0
- Leonardo AI
- Not rated
Image Quality
- Grammarly
- Not rated
- Leonardo AI
- 8.7
Model Variety
- Grammarly
- Not rated
- Leonardo AI
- 9.0
Customization & Control
- Grammarly
- Not rated
- Leonardo AI
- 8.8
Scores weigh documented features, plan value, platform coverage, integrations and user feedback. A missing score means we have not rated that area yet.
Pros and cons
Grammarly
Pros
- Works across desktop, browser, Office, Google Docs and mobile keyboards, so suggestions follow you between apps.
- Free plan covers core grammar, spelling and tone visibility with 100 AI prompts per month.
- Pro adds tone adjustment, full-sentence rewrites, plagiarism and AI-text detection in a single subscription.
- Team features include style guides, brand tones, analytics and user groups; Enterprise adds SSO, SCIM and audit logs.
- Public REST APIs exist for analytics, licence management, writing score and detection.
Cons
- Monthly billing for Pro is $30, versus $12 per month on annual billing, so month-to-month use costs 2.5 times as much.
- Third-party tests of the AI Detector report notable false-positive rates (figures range from 14.2% to 34% across sources), so it is unreliable as proof.
- An App Store reviewer criticizes the iOS keyboard setup for pushing users to grant broad access.
- Experienced writers on forums report turning off many suggestions; advanced features are gated behind Pro.
Leonardo AI
Pros
- Free plan with 150 tokens per day
- Many first-party and third-party image and video models in one account
- Personal model training on paid plans
- AI Canvas for inpainting and outpainting
- Apps for iOS and Android, plus a pay-as-you-go API
Cons
- Free generations are public and the daily allowance is small
- Token costs vary by model and settings, so spend is hard to predict
- Unlimited relaxed video generation needs the $60 Ultimate plan
- Official pricing page blocks automated access, so plan details need checking on the site
Platforms
- WebGrammarlySupportedLeonardo AISupported
- WindowsGrammarlySupportedLeonardo AINot supported
- macOSGrammarlySupportedLeonardo AINot supported
- iOSGrammarlySupportedLeonardo AISupported
- AndroidGrammarlySupportedLeonardo AISupported
- APIGrammarlySupportedLeonardo AISupported
- Browser ExtensionGrammarlyNot supportedLeonardo AINot supported
- Chrome ExtensionGrammarlySupportedLeonardo AINot supported
- Firefox ExtensionGrammarlySupportedLeonardo AINot supported
Integrations
Grammarly
7 integrations- Microsoft Office
- Google Docs
- Chrome
- Safari
- Firefox
- Edge
- Zendesk
Leonardo AI
5 integrations- Leonardo MCP server
- Python SDK
- TypeScript SDK
- Cursor
- VS Code
Company
- CompanyGrammarlySuperhumanLeonardo AILeonardo Interactive Pty Ltd
- FoundedGrammarly2009Leonardo AI2022
- HeadquartersGrammarlySan Francisco, CALeonardo AISydney, Australia
- Monthly usersGrammarly40 million peopleLeonardo AINot listed
- ListingGrammarlyClaimedLeonardo AIClaimed
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Related comparisons
More AI Assistants tools, head to head.
Grammarly vs Claude
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- Grammarly
- Freemium
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- Rated4.5Freemium
Leonardo AI vs Claude
Image & Visual AI
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Grammarly vs DeepSeek
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- Grammarly
- Freemium
- DeepSeek
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Leonardo AI vs DeepSeek
Image & Visual AI
- Leonardo AI
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- DeepSeek
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Grammarly vs Gemini Notebook
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- Grammarly
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- Gemini Notebook
- Freemium
Leonardo AI vs Gemini Notebook
Image & Visual AI
- Leonardo AI
- Freemium
- Gemini Notebook
- Freemium
Frequently asked questions
Is Grammarly better than Leonardo AI?
It depends on your workflow. Grammarly is built for polishing emails and documents in real time across many apps, keeping tone and style consistent across a team. Leonardo AI is built for game and concept art.
What are the key feature differences between Grammarly and Leonardo AI?
Grammarly: AI writing assistant that corrects, rewrites and tone-checks your text across every app. Leonardo AI: AI image and video studio with custom model training and a real-time canvas editor.
Does Grammarly or Leonardo AI have a free plan?
Yes, both do. Grammarly is freemium and Leonardo AI is freemium, and each has a free plan or trial.
Which is cheaper, Grammarly or Leonardo AI?
Both can be used for free. Paid plans differ in limits and features, so compare the tiers in the pricing table above.