What these tools do and who needs them
Research tools differ from ordinary chatbots in one key way: they cite. When you ask a question you get an answer plus the web pages or documents it came from, so you can verify for yourself. Students writing reports, journalists checking facts and marketing teams doing competitive research are the main users.
This category centres on the 4 research tools below; the price table also lists related tools from other categories. Perplexity is an AI search engine that attaches sources to every answer, the first pick for data-oriented users, from US$10/month. Felo is a Japanese AI search product with strong localisation and a generous free allowance, from US$12.5/month (billed annually). Gemini Notebook lets you feed in documents to get summaries and Q&A, or even produce a podcast from your files, from US$4.99/month. Comet is an AI browser that combines search and task automation and can synthesise information across multiple tabs, from US$5/month. Other tools in the table include the developer playground Google AI Studio, data analysis tool Livedocs, open-source trading research Vibe-Trading, SEO audit platform OpenSEO, social listening tool buzzabout and content SEO platform Surfer SEO.
Three traps when picking
1. “Basic search free” and “pro search a few times a day” are very different things. Perplexity free allows unlimited basic searches, but Pro searches are capped daily. Felo gives about 5 Pro searches and 3 file analyses per day, reset at midnight. If you need to dig into one topic in depth, the free pro allowance is gone in half an hour.
2. Some trials last only one day. buzzabout has no permanent free plan; the trial is a credit balance good for 500 mentions that must be used within a day, and the lowest monthly plan is US$98. Surfer SEO has no free tier and only a 7-day refund guarantee, with a minimum monthly plan of US$49. Before trying either, confirm you actually need a professional-grade platform.
3. Free tiers may cap the number of sources. The core value of a research tool is verifiable sources, but free plans sometimes limit uploaded files, source count or the number of notebooks. Gemini Notebook’s page notes caps on both sources and notebooks in the free tier. Before a formal report, open the AI’s cited sources and read them yourself.
How to choose: three plain rules
- Are you finding new information or organising material you already have? Finding: pick a cited AI search tool. Organising: pick a notebook that accepts file uploads.
- Count your daily deep-dive queries. Free pro allowances are typically single digits per day; beyond that, look at the cheapest monthly plan, starting from US$4.99 in this category.
- For professional platforms, confirm the use case before the price. The cheapest and most expensive monthly plans here differ by about 20 times (US$4.99 versus US$98); the difference is individual versus marketing or SEO professional.
