Comparison · Updated April 2026
Grammarly vs Jan
An in-depth comparison of Grammarly and Jan across pricing, features, strengths, and ideal use cases — so you can pick the right tool for your workflow.
Quick verdict
Choose Grammarly if you need anyone who writes professionally. Choose Jan if you prioritize privacy-conscious users wanting a simple local ai chat app. Grammarly scores higher in user reviews (4.6 vs 4.3). Both offer free tiers — try each before committing.
Grammarly
AI writing assistant for grammar, style, and tone
Free · Premium $12/mo · Business $15/member/mo
Full review →Jan
Open-source ChatGPT alternative that runs 100% offline
Completely free and open-source
Full review →What is Grammarly?
Grammarly is the most widely deployed AI writing assistant, used by over 30 million people daily across browsers, desktop apps, and mobile keyboards. It operates everywhere you write, including email clients, Google Docs, Slack, social media, and CMS platforms, checking grammar, spelling, punctuation, clarity, tone, and style in real time. The free tier handles basic grammar and spelling. Premium ($12/mo) adds advanced suggestions for clarity, engagement, and delivery, plus a plagiarism detector that checks against 16 billion web pages. GrammarlyGO, the generative AI feature, enables full text generation, rewriting, brainstorming, and reply suggestions with controls for tone, formality, and length. For teams, Grammarly Business ($15/member/mo) adds a style guide, brand tones, analytics dashboard, and admin controls. Its strength is ubiquity: it works in the tools you already use without requiring context switching. It is the safest recommendation for anyone who writes professionally in English and wants polished, error-free output. The tool is best suited for anyone who writes professionally. It offers a free tier alongside paid plans (Free · Premium $12/mo · Business $15/member/mo), making it accessible for individuals and teams alike.
What is Jan?
Jan is a free, open-source desktop application for running AI models locally with a ChatGPT-like interface. Available for Mac, Windows, and Linux, Jan provides a polished native app experience for downloading and chatting with open-source models including Llama 3, Mistral, Phi, and dozens of others from the Hugging Face ecosystem. The app handles model downloading, memory management, and GPU acceleration automatically. Key features include conversation history, model switching, system prompt customization, local RAG for chatting with documents, and an API server that makes your local model accessible to other applications. Extensions enable additional functionality including web search, tool use, and custom integrations. Thread management lets you organize conversations by project or topic. Jan runs entirely offline after initial model download, meaning complete data privacy with no telemetry or data collection. It is completely free with no subscription, API keys, or usage limits. Jan is the most user-friendly option for non-technical users who want to run AI locally on their personal computer. The tool is best suited for privacy-conscious users wanting a simple local ai chat app. Pricing starts at Completely free and open-source.
Key differences at a glance
Pricing: Grammarly is priced at Free · Premium $12/mo · Business $15/member/mo, while Jan costs Completely free and open-source.
User ratings: Grammarly leads with a 4.6/5 rating from 4,500 reviews, compared to Jan's 4.3/5 from 230 reviews.
Best for: Grammarly is optimized for anyone who writes professionally, while Jan excels at privacy-conscious users wanting a simple local ai chat app.
Category overlap: Both tools compete in the productivity category. Grammarly also covers writing. Jan also covers chatbot.
Feature-by-feature comparison
| Feature | Grammarly | Jan |
|---|---|---|
| Pricing model | Freemium | Free |
| Starting price | Free · Premium $12/mo · Business $15/member/mo | Completely free and open-source |
| User rating | ||
| Best for | Anyone who writes professionally | Privacy-conscious users wanting a simple local AI chat app |
| Categories | writingproductivity | chatbotproductivity |
| Free tier available | ✓ Yes | ✓ Yes |
| Web browsing / search | — No | ✓ Yes |
| File upload & analysis | — No | ✓ Yes |
| API access | — No | ✓ Yes |
| Mobile app | ✓ Yes | ✓ Yes |
| Team / collaboration plan | ✓ Yes | — No |
| Custom bots / agents | ✓ Yes | ✓ Yes |
| Grammar & spelling | ✓ Yes | — No |
| Tone detection | ✓ Yes | — No |
| Style suggestions | ✓ Yes | — No |
| Generative AI | ✓ Yes | — No |
| Plagiarism detection | ✓ Yes | — No |
| 100% offline capability | — No | ✓ Yes |
| Beautiful desktop UI | — No | ✓ Yes |
| Model download manager | — No | ✓ Yes |
| GPU acceleration | — No | ✓ Yes |
| Conversation history | — No | ✓ Yes |
| Multiple model support | — No | ✓ Yes |
Pros and cons
Grammarly
Strengths
- Works everywhere
- Best grammar correction
- Tone detection
- Massive trust
Limitations
- Premium required for advanced
- Gen AI less capable
- Can be prescriptive
Jan
Strengths
- Complete privacy
- Beautiful interface
- No technical setup needed
- Free forever
Limitations
- Requires good hardware
- Model quality varies
- Smaller community than Ollama
Pricing comparison
Grammarly uses a freemium pricing model: Free · Premium $12/mo · Business $15/member/mo. The free tier is a good way to evaluate the tool before upgrading.
Jan uses a free pricing model: Completely free and open-source.
For cost-sensitive teams, compare actual API or per-seat costs using our AI Cost Calculator.
Which tool should you choose?
Choose Grammarly if you...
- → Need anyone who writes professionally
- → Value works everywhere
- → Value best grammar correction
- → Want to start free before committing
Choose Jan if you...
- → Need privacy-conscious users wanting a simple local ai chat app
- → Value complete privacy
- → Value beautiful interface
- → Want to start free before committing
Not sure which fits your workflow? Take our AI Tool Finder Quiz for a personalized recommendation based on your role, budget, and technical level.
Final verdict: Grammarly vs Jan
Both Grammarly and Jan are strong tools in the productivity space, but they serve different needs. Grammarly stands out for works everywhere, making it ideal for anyone who writes professionally. Jan differentiates with complete privacy, which benefits users focused on privacy-conscious users wanting a simple local ai chat app.
With a 0.3-point rating advantage and 4,500 reviews, Grammarly has the edge in user satisfaction. The best approach is to try Grammarly's free tier and Jan's free tier to see which fits your specific workflow.
Frequently asked questions
Is Grammarly better than Jan?
It depends on your use case. Grammarly is best for anyone who writes professionally. Jan excels at privacy-conscious users wanting a simple local ai chat app. Based on user ratings, Grammarly scores slightly higher at 4.6/5.
How much does Grammarly cost compared to Jan?
Grammarly pricing: Free · Premium $12/mo · Business $15/member/mo. Jan pricing: Completely free and open-source. Both offer free tiers, so you can try each before committing.
Can I use Grammarly and Jan together?
Yes, many professionals use both tools for different tasks. You might use Grammarly for anyone who writes professionally and Jan for privacy-conscious users wanting a simple local ai chat app. Using complementary tools often produces the best results.
What are the best alternatives to Grammarly and Jan?
Top alternatives include Claude, ChatGPT, Cursor. Each offers different strengths — browse our alternatives pages for Grammarly and Jan for detailed breakdowns.
Which tool is easier to learn — Grammarly or Jan?
Grammarly has a moderate learning curve. Jan has a moderate learning curve. Both tools offer documentation and tutorials to help new users get started quickly.
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