Start with free search tools.
Google Trends shows how interest in a topic changes over time. It shows relative interest, not exact search numbers. Its Explore page now includes a Gemini-powered side panel that suggests and compares related topics, which is a nice help for beginners.
AnswerThePublic turns one topic into the real questions people ask about it. That matters today, because many people now ask full questions to search engines and AI chatbots, not just type a single keyword. The free plan allows only a few searches per day, so choose your topics carefully.
Add an AI chatbot as your research partner.
A chatbot can explain a market in plain language, suggest niche ideas, and ask you good questions in return. ChatGPT was my first, but it is not the only choice. Perplexity is my first pick for research now because it shows the sources behind its answers, so you can check them. Besides that,
ChatGPT: a great all-round partner for brainstorming and step-by-step conversation.
Gemini: a good fit if you already live in Google’s world
Claude: strong with long documents and writing, but its free use is limited by usage windows.
Each of them has a free basic plan, but the free plans have limits, and the limits change often. Check each tool’s current plan before you rely on it.
AI can also be confidently wrong. I have seen it produce serious factual errors. So, treat it like a smart assistant, not a final authority: ask for sources, then open them yourself.
Simple niche research questions could be:
Is this a real market with money in it?
Who is the customer, and what problem do they have?
Is it good for a blog, service, product, or local business?
Finish with: “Please give me links to your sources.”
Check the platform you already use.
Some platforms have research tools built in, or tools made for their sellers. Etsy sellers, for example, often use eRank and EverBee. Both have free plans, with paid upgrades. So, before looking elsewhere, check what your platform (or the one you plan to use) already provides or recommends.
Skip the expensive platforms (for now).
Professional SEO tools like Semrush, Ahrefs, and Moz give more detail, such as estimated search volume and competition. But their paid plans often cost around $100 a month or more, so I do not recommend them for start-ups.