You can start free with OpenClaw, Claude, Gemini, ChatGPT, Microsoft Copilot, Grok, Wrtn, GLM, Qwen, and DeepSeek. Free limits (usage, features, commercial use) vary by tool, so check the pricing section on each tool’s page.
AI Basics · Picks by Category
Best AI chatbots, compared
A conversational AI that is the starting point for almost any task, from summarizing documents to drafting plans and writing emails. Going deep with one tool beats dabbling in several, so the first step is to choose your main tool.
11 tools10 free to start7 with excellent Korean
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At a Glance
Free availability, Korean support, and difficulty are based on each tool’s official information.
| Tool | Verdict | Free | Korean | Level |
|---|---|---|---|---|
| OpenClaw | Installable AI agent | Free tier | Moderate | Advanced |
| Claude | The most talked-about AI | Free tier | Excellent | Beginner |
| Gemini | Google’s all-purpose AI | Free tier | Excellent | Beginner |
| ChatGPT | A comeback with Astra | Free tier | Excellent | Beginner |
| Microsoft Copilot | AI you use inside Office | Free tier | Excellent | Beginner |
| Grok | Chatbot with strong real-time search | Free tier | Excellent | Beginner |
| Wrtn | Korean AI you can use without logging in | Free tier | Excellent | Beginner |
| GLM | Chinese AI strong at coding | Free tier | Moderate | Advanced |
| Kimi | AI that reads long documents in one go | Paid | Moderate | Intermediate |
| Qwen | Alibaba’s multilingual AI | Free tier | Moderate | Intermediate |
| DeepSeek | China’s fast, low-cost flagship AI | Free tier | Excellent | Beginner |
TOOLS
Browse by tool
OpenClawA self-hosted AI agent
Tools we recommend first in coursesOpenClaw is an open-source AI agent you install on your own computer. Message it on Telegram or Slack, and it uses your files, terminal, and browser to carry out the tasks you give it.
Best forManagers at organizations that can’t upload materials to external services
Free planKorean: fairLearn more →
ClaudeOur top-rated AI
Tools we recommend first in coursesClaude is a conversational AI from Anthropic in the US. It reads long documents whole and keeps context while writing and analyzing, so it is a go-to tool for “reading and writing work” such as reports, proposals, and policy reviews.
Best forAnyone whose work revolves around documents such as reports, proposals, and meeting minutes
Free planStrong KoreanLearn more →
GeminiGoogle’s all-purpose AI
Tools we recommend first in coursesGemini is a conversational AI from Google that works hand in hand with Google services such as Search, Gmail, Drive, and YouTube, making it strong at “finding and organizing” work.
Best forTeams on Google Workspace (Gmail, Drive)
Free planStrong KoreanLearn more →
ChatGPTBack on track with Astra
ChatGPT is a conversational AI from OpenAI and the best-known tool for handling writing, images, data analysis, and voice in a single window. Since GPT-6 Astra, released in September 2026, it can also operate your computer and browser directly.
Best forAnyone who wants one tool to cover most needs
Free planStrong KoreanLearn more →
Microsoft CopilotAI inside Office
Microsoft Copilot is Microsoft’s AI, built to read and write documents and email directly inside Word, Excel, PowerPoint, and Outlook. It fits most naturally into organizations that already use Office.
Best forAnyone whose company already uses Microsoft 365
Free planStrong KoreanLearn more →
GrokA chatbot strong at real-time search
Grok is a conversational AI from xAI that scans X (formerly Twitter) and the web directly, pulling the latest news and reactions into its answers. The same app can also generate images and video.
Best forPR and marketing staff who need to scan online opinion and reactions fast
Free planStrong KoreanLearn more →
WrtnA Korean AI you can use without logging in
Wrtn is a Korean AI service from Wrtn Technologies. You can chat without signing up, and it brings tools such as YouTube summaries and live recording together on one screen, free of charge.
Best forEmployees and trainees trying AI for the first time
Free planStrong KoreanLearn more →
GLMA Chinese AI strong at coding
GLM is a family of models from China’s Zhipu AI, offered through a chat interface called Z.ai and a developer API. Its distinguishing feature is a separate monthly subscription plan for use inside coding tools.
Best forDevelopment teams looking to cut monthly costs for AI coding assistants
Free planKorean: fairLearn more →
KimiAn AI that reads long documents whole
Kimi is a conversational AI from Moonshot AI in Beijing, China. Its selling points are reading very long documents in one pass and agent features that carry out multiple steps on their own.
Best forPlanning and administrative staff who often read long public documents
PaidKorean: fairLearn more →
QwenAlibaba’s multilingual AI
Qwen (Tongyi Qianwen) is a conversational AI from Alibaba Cloud. It works across multiple languages and handles text, images, and voice together, and its developer API is also available in Alibaba Cloud’s Singapore region.
Best forTrade and purchasing managers who often read documents from suppliers in China and Southeast Asia
Free planKorean: fairLearn more →
DeepSeekChina’s fast, low-cost flagship AI
DeepSeek is a conversational AI from Hangzhou-based DeepSeek, known for releasing its models openly and sharply cutting developer API prices. You can use it in Korean right away on the web and in its app.
Best forProfessionals who want to learn AI while keeping costs down
Free planStrong KoreanLearn more →
CRITERIA
How we chose
We looked at how accurately each tool reads long documents, how natural its Korean sounds, and under what conditions you can enter company materials. Tools highlighted in yellow are the ones we recommend first in our courses.
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CATEGORY
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FAQ
Rated “excellent” for Korean support: Claude, Gemini, ChatGPT, Microsoft Copilot, Grok, Wrtn, and DeepSeek.
Nanum Consulting courses recommend OpenClaw, Claude, and Gemini first. It’s faster to pick one, use it on real work for about two weeks, and then compare it with other tools.
Tools differ in whether your input is used for training and in what changes on business plans. Check the “Is it safe to use at work?” section on each tool’s page, and as a rule don’t enter data such as customer personal information or contract amounts.
Last updated 22 Sep 2026 · Free-plan availability, pricing, and terms are the values confirmed on each tool’s official page. Ratings are based on John Kim, CEO of Nanum Consulting, using these tools firsthand in training sessions and real work.
Knowing a tool isn’t the same as an organization using it
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