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Why Ludwig AI Chat
Versatility meets precision
Everything you do on ChatGPT and much more
Use Ludwig for any task throughout your day—brainstorming, problem-solving, learning, planning. When you switch to writing tasks, Ludwig's offers you a set of dedicated tools that generic AI assistants can't provide.
Upload your documents
Chat with your PDFs
Tired of searching through documents for answers? Upload your documents and turn your questions into insights.
Multilingual support
Chat in any language
Ask questions in Chinese, Spanish, Japanese, Korean, Arabic, German, —any of 100+ languages. Ludwig responds naturally and can help you translate, verify expressions, or understand language nuances with context from real English sources.
Works where you write
Get AI insights while writing on the Document Editor
Tired of searching through documents for answers? Upload your documents and turn your questions into insights
Always updated
Always the freshest information from the web
Forget about training cutoffs. Ludwig AI now supports web search, so that you'll have the most current data for updated answers.
Native desktop power, universal integration
Get the Ludwig experience without switching tabs, by downloading the desktop app. It works perfectly with all your favorite writing apps, too!
Download desktop app
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Why you should go Ludwig Premium
Free
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Limited number of daily messages
✓
Small context tokens per chat
✓
Limited access to file uploads
Premium
✓
Unlimited messages
✓
Maximum context tokens per chat
✓
Maximum access to file uploads
*Unlimited access is subject to abuse guardrails.
Learn more about Ludwig Premium
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Trusted by 2 million users worldwide
Ludwig is by far the best website to check your language to find examples in prominent papers. I am a language teacher and an author, and with the help of Ludwig, I can ensure what I'm teaching is authentic and, more importantly, reliable!
IELTS Go pro
I have been very pleased with Ludwig.guru application from the start, it definitely helped me both in academic and professional environments. I would absolutely recommend Ludwig.guru to anyone who wants to achieve that next level of writing style, seek to improve one's writing skills and/or enhance one's writing ability.
Pete
The app service is practical and very intuitive. It has greatly helped me during the writing of my scientific articles and even long my phD thesis. Thanks to Ludwig, I fixed some style mistakes, and it provided me with several good suggestions. I recommend it!
Alessandro
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Frequently Asked Questions
What is Ludwig AI Chat?
Ludwig AI Chat is a complete AI assistant like ChatGPT or Claude—you can ask about anything. What makes Ludwig unique is its connection to a database of 300M verified English sentences from academic papers, major publications, and trusted sources. When you're working on writing tasks, Ludwig provides context verification and real-world examples showing how expressions are used in professional writing.
How is Ludwig AI Chat different from ChatGPT or Claude?
Ludwig offers the same versatility as ChatGPT or Claude for general questions, coding, brainstorming, and any other tasks. The difference: Ludwig has language superpowers. When you ask about writing, grammar, or word choice, Ludwig shows you real examples from The New York Times, academic journals, and verified sources—not just AI-generated suggestions. You get AI assistance plus proof from professional writers.
Can I use Ludwig AI Chat for non-language tasks?
Absolutely. Ludwig handles any topic: programming help, math problems, business strategy, meal planning, travel advice, creative brainstorming, learning new concepts—anything you'd ask ChatGPT or Claude. The language verification features activate when you need them, but Ludwig is a complete AI assistant for your entire day.
How does "chat with documents" work?
Upload PDFs, Word documents, or text files directly in the chat. Ludwig analyzes your content and you can ask questions, request summaries, extract specific information, or discuss concepts from your documents. For research papers or professional documents, you also get language verification showing how expressions in your documents are used in other professional sources.
Can I chat in languages other than English?
Yes. Ask questions in any of 100+ languages including Chinese, Spanish, Japanese, French, Arabic, Korean. Ludwig responds naturally in your language and can help with translation, language learning, or verifying how expressions work in English with real source examples.
Is my chat history saved?
Yes. Your conversation history is saved so you can return to previous discussions. Premium users get unlimited history access. All conversations are private and follow European data protection standards with servers in Italy, Germany, and France. Your chats are not used for AI training.
What does "Unlimited" usage mean?
Premium users can use Ludwig AI Chat without limitations. There are some guardrails in place to prevent abuses and to allow all users access the service effectively. Usage must adhere to our Terms of Use, which prohibits, among other things:
• Abusive usage, such as automatically or programmatically extracting data.
• Sharing your account credentials or making your account available to anyone else.
• Reselling access or using Ludwig Premium to power third-party services.
To prevent misuse, we have guardrails in place and are always working to improve our systems. This may occasionally involve a temporary restriction on your usage. We will inform you when this happens, and if you think this might be a mistake, please don't hesitate to reach out to our support team at support@ludwig.guru from the support button in the menu. If policy-violating behavior is not found, your access will be restored.