Comparison · VERIFIED 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.
⭐ Strongest At
Every tool has one thing it does better than its competitors. Here is each one's honest edge:
real-time grammar, tone, and clarity suggestions everywhere you type.
open-source ChatGPT alternative that runs entirely on your machine.
🏆 Who Should Choose Which?
Grammarly
Both offer free tiers — compare plans
Jan — simpler to start
Grammarly — stronger at scale
📊 Quick Specs
🎯 Best if you need…
Quick take: Choose Grammarly if you prioritize productivity workflows and value its unique strengths. Choose Jan if you need a different approach or better fit for your specific use case. Both score well — the best choice depends on your workflow.
Quick verdict
Choose Grammarly if your daily work is mostly real-time grammar, tone, and clarity suggestions everywhere you type. Choose Jan if your daily work is mostly open-source ChatGPT alternative that runs entirely on your machine. 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.
ToolChase scores: Grammarly leads with a 4.6/5 rating, compared to Jan's 4.3/5.
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 |
| ToolChase score | ||
| 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 is best at complete privacy — particularly for teams focused on privacy-conscious users wanting a simple local ai chat app.
Grammarly scores higher on ToolChase. The best approach is to try Grammarly's free tier and Jan's free tier to see which fits your specific workflow.
🔄 Switching? Keep in mind
Workspace data (notes, databases, projects) is the main switching cost. Most tools offer export, but formatting and relationships may not transfer cleanly. Automation workflows need to be rebuilt from scratch.
Related comparisons
See something wrong? Report an issue · Suggest a tool
Frequently asked questions
Grammarly vs Jan — which one should I pick?
It depends on the job. Grammarly is strongest at real-time grammar, tone, and clarity suggestions everywhere you type. Jan is strongest at open-source ChatGPT alternative that runs entirely on your machine. Pick Grammarly if its strength matches your daily work, and Jan if the second description matches better. There is no objectively 'better' answer — only the better fit for the specific work you do most often.
Is Grammarly or Jan cheaper?
Grammarly pricing: Free · Premium $12/mo · Business $15/member/mo. Jan pricing: see official site. Pricing alone is rarely the right reason to choose between them — the wrong tool at half the price still wastes your time.
Does Grammarly or Jan have a free plan?
Free-tier availability changes frequently for both Grammarly and Jan. Check the official site before signing up — never trust a third-party page (including this one) to be perfectly up to date on plans.
Can I use Grammarly and Jan together?
Yes — there is no technical or licensing reason you cannot use Grammarly and Jan side by side. Many people do exactly this: Grammarly for real-time grammar, Jan for open-source ChatGPT alternative that runs entirely on your machine. The only cost is paying for two subscriptions if you upgrade both.
What does Grammarly do that Jan cannot?
Grammarly's honest edge over Jan is real-time grammar, tone, and clarity suggestions everywhere you type. Jan cannot match this directly — though it has its own edge (open-source ChatGPT alternative that runs entirely on your machine). If your daily work depends on what Grammarly is uniquely good at, that is the deciding factor. Otherwise feature parity will probably feel close enough.