When you run a US company on your own, you handle everything yourself, from English emails and marketing images to meeting notes and research. Fortunately, the right mix of free and low-cost AI tools for solopreneurs can take a load of repetitive work off your plate that would otherwise need one or two employees. In this article, we pick 15 tools worth using across real-world workflows and cover how far each free plan goes and when it makes sense to upgrade.
How to Choose: A Non-Overlapping Mix Beats Expensive Tools
AI tools overlap a lot in what they do. Before adding more subscriptions, check these three things first to avoid wasting money.
- Try the free plan for two weeks: Most tools offer a free plan or trial period. Use them for real work, and upgrade only the tools whose limits you keep hitting.
- Check whether AI is already included in what you pay for: If you use Google Workspace or Microsoft 365, AI features may already be included or available as a low-cost add-on.
- Don’t enter sensitive information: On free and personal plans, what you enter may be used to improve models. As a rule, keep customer lists, bank account details, and contract pricing out.
We cover the differences in pricing and data policies among the three general-purpose AIs (ChatGPT, Claude, and Gemini) in detail in ChatGPT vs. Claude vs. Gemini for Business.
The 15 Tools at a Glance
| Category | Tool | Free plan | Recommended use |
|---|---|---|---|
| General-purpose AI | ChatGPT | Yes | Emails, data analysis, images |
| General-purpose AI | Claude | Yes | Summarizing long documents, writing |
| General-purpose AI | Gemini | Yes | Work connected to Gmail and Docs |
| General-purpose AI | Microsoft Copilot | Yes | Q&A based on web search |
| Research | Perplexity | Yes | Market research with cited sources |
| Research | NotebookLM | Yes | Summaries and Q&A based on your own materials |
| Design | Canva | Yes | Social media images, product page mockups |
| Presentations | Gamma | Yes | Draft proposals and pitch decks |
| Video | CapCut | Yes | Short-form editing, auto captions |
| Translation | DeepL | Yes | Korean-to-English translation drafts |
| Proofreading | Grammarly | Yes | English grammar and tone correction |
| Meetings | Otter.ai | Yes | Transcribing and summarizing English meetings |
| Automation | Zapier | Yes | Connecting repetitive tasks across apps |
| Office | Google Workspace (Gemini) | Paid (low cost) | Business email and documents + AI |
| Organization | Notion AI | Basic document features free | Organizing work docs and a wiki |
Free plan limits and paid pricing change often. The prices below are as of November 2026 and subject to change, so check each official page before you pay.
4 General-Purpose AIs: Pay for Just One
1. ChatGPT
It has the broadest range of features. Use it across the board: upload Excel or CSV files to analyze sales, create product image concepts, or draft English emails. The individual paid plan, Plus, is $20/month; for teams that need data protection, consider Business ($25 per user per month, or $20 billed annually, minimum 2 users) (OpenAI Help Center).
2. Claude
Many users say it excels at summarizing long PDFs, contracts, and government notices in a structured way and at writing English text in a consistent tone. Pro is $20/month ($17/month billed annually) (Claude pricing).
3. Gemini
The personal Gemini app is free to use, and the higher-tier plan, Google AI Pro, is $19.99/month. If your company email runs on Google, Workspace (No. 14 below) is the more efficient route.
4. Microsoft Copilot
A general-purpose AI you can use for free with just a Microsoft account. It works well as a secondary tool for cross-checking other AIs’ answers rather than as your main one.
Tip: You don’t need to pay for all four. Paying for just one and using the rest for free as a comparison is the most economical approach for a solopreneur.
Research and Content: From Market Research to Marketing Assets
5. Perplexity
Because it attaches source links to every answer, it’s handy for researching US competitors, checking regulations, and tracking industry trends. There is a free plan, and Pro runs about $20/month. Even with sources cited, make a habit of opening the originals and checking the numbers yourself.
6. NotebookLM
A free research tool from Google that answers based only on the PDFs, documents, and web pages you upload. It works well when you put IRS notices, Amazon policy documents, and supplier catalogs into one notebook and ask something like “List only the parts of these documents that mention deadlines.”
7. Canva
Even the free plan includes templates and some AI features (image generation, background removal, etc.). Upgrade to Pro when you need a brand kit or advanced AI features.
8. Gamma
Enter a topic and outline, and it creates a draft presentation. It’s useful for quickly building the skeleton of a pitch deck for investor meetings or a proposal for a client, and you can start on the free plan.
9. CapCut
Edit videos for TikTok, Instagram Reels, and YouTube Shorts and add automatic English captions. It’s useful for sellers who make their own short-form product videos.
English Communication: Translation, Proofreading, Meeting Notes
10. DeepL
Its Korean-to-English drafts are fairly high quality. Rather than sending the translation as is, though, ask a general-purpose AI to “polish this into a US business email tone,” and it will read much more naturally.
11. Grammarly
Install it as a browser extension and it corrects grammar and tone in real time wherever you write, including Gmail and Amazon Seller Central messages. The free version’s basic corrections alone cut down mistakes significantly.
12. Otter.ai
It transcribes and summarizes English meetings in real time. The free plan limits monthly transcription minutes and the length of each conversation, so consider upgrading if you meet with clients often. Telling the other party in advance that you’re recording is both basic courtesy and a legal precaution.
Automation and Office: Cutting Repetitive Work
13. Zapier
It connects tasks without coding, such as “when an order comes in on Shopify, log it in Google Sheets and send a Slack notification.” The free plan limits the number of runs and steps, so start by automating your single most repetitive task.
14. Google Workspace (Including Gemini)
If you need email on your company domain, it’s practically essential. According to the official pricing page, Business Starter is $7 per user per month (annual commitment) and Business Standard is $14/month, and from Standard up you can use Gemini extensively in Gmail, Docs, Meet, and more (Google Workspace pricing). Google explicitly states that Gemini in Workspace does not use company data to train models, so you can use it for work with confidence.
15. Notion AI
Bring your work manuals, supplier information, and to-do lists together in one place and summarize or search them with AI. The scope of AI features differs by plan, so try organizing your documents for free first and upgrade when you need to.
Recommended Combinations by Monthly Budget
| Monthly budget | Combination | Best for |
|---|---|---|
| $0 | ChatGPT, Claude, Gemini free + Perplexity + NotebookLM + Canva + DeepL + Grammarly | Pre-launch stage, low workload |
| Around $30 | One general-purpose AI paid ($20/month) + Workspace Starter ($7/month) + the rest free | Right after forming your company, heavy email and document work |
| Around $50 | One general-purpose AI paid + Workspace Standard ($14/month) + one paid meeting or design tool | When client meetings and marketing content production increase |
AI subscriptions are part of your company’s operating costs. To see your total fixed costs, read US Company Maintenance Costs, and for cards and accounts to pay for subscriptions, see Fintech Banks Compared: Mercury, Relay, and More. We cover which AI tools and trends will matter going forward in Business AI Trends for 2027.
Frequently Asked Questions (FAQ)
Can I run my business on free plans alone?
In the early stages, absolutely. But once you start hitting usage limits often or need to handle customer information, it’s safer to move to a paid or business plan with clear data protection terms.
Can I deduct AI subscriptions as a business expense?
Software subscriptions used for business purposes are generally treated as business expenses in many cases. Pay with a company card and keep your receipts. This article is general information, not legal or tax advice; consult a CPA or attorney about your specific situation.
Can I use these tools if my English isn’t strong?
Yes. Most of them will produce English output even if you give instructions in Korean. Still, run final documents for clients through DeepL or Grammarly once more, and always verify amounts, dates, and terms yourself.
For a solopreneur, AI tools don’t replace employees; they’re support that helps you avoid missing things while working alone. Starting free and investing only in the one tool you use most is the most efficient approach. If you’re still deciding on a business structure, start with Choosing a US Business Entity: A Guide for Solo Founders, and if you need help, please contact USdongsan.
