# Research

> “Research a topic with AI”. Ranked by expert consensus and what people use now; affiliate links never change the order.

Pick a research tool by where your sources live. Perplexity searches the web and links every claim, so you can check each answer quickly. NotebookLM answers only from the PDFs, sites and Docs you add, citing the exact passage, which suits contracts, reports and interviews. Claude handles long documents and careful reasoning, ChatGPT covers everyday questions with web search, and Elicit pulls findings from scientific papers into tables.

Last checked: 2026-10-02

## Ranking

1. **[Perplexity](https://suiteintent.com/t/perplexity?m=GB)**: AI search that answers with cited sources. · Best for: Quick research you can fact-check · Free plan
2. **[Claude](https://suiteintent.com/t/claude?m=GB)**: Anthropic's AI assistant, with MCP connections. · Best for: Connecting AI to your own tools with MCP · Free plan
3. **[ChatGPT](https://suiteintent.com/t/chatgpt?m=GB)**: OpenAI's general-purpose AI assistant. · Best for: Daily writing, research and quick answers · Free plan
4. **[NotebookLM](https://suiteintent.com/t/notebooklm?m=GB)**: Google's AI notebook for your own sources. · Best for: Understanding your own documents · Free plan
5. **[Elicit](https://suiteintent.com/t/elicit?m=GB)**: AI research assistant for academic papers. · Best for: Pulling data from dozens of studies · Free plan

## Side by side

| Tool | Price | Ease of use (1-5) | Team size |
| --- | --- | --- | --- |
| Perplexity | Pricing on request | 4 | solo, small team, growing team |
| Claude | Free plan | 5 | solo, small team, growing team, large team |
| ChatGPT | Pricing on request | 4 | solo, small team, growing team |
| NotebookLM | Pricing on request | 4 | solo, small team, growing team, large team |
| Elicit | Free plan | 4 | solo, small team, growing team |

## Why these picks

- Prices last checked: 2026-10-02
- Ranked by expert consensus and what people use now; affiliate links never change the order.

## Head to head

- [ChatGPT vs Claude: which helps you prep interviews](https://suiteintent.com/compare/chatgpt-vs-claude)
- [ChatGPT vs Gemini: which AI assistant for a team](https://suiteintent.com/compare/chatgpt-vs-gemini)
- [ChatGPT vs Julius: which to analyse your data](https://suiteintent.com/compare/chatgpt-vs-julius)
- [ChatGPT vs Copilot: for Microsoft 365 users](https://suiteintent.com/compare/chatgpt-vs-microsoft-copilot)
- [ChatGPT vs Mistral Vibe: US giant or French pick](https://suiteintent.com/compare/chatgpt-vs-mistral-vibe)
- [ChatGPT vs Perplexity: assistant or AI search](https://suiteintent.com/compare/chatgpt-vs-perplexity)
- [Claude vs Gemini: careful reader or Google helper](https://suiteintent.com/compare/claude-vs-gemini)
- [Claude vs Perplexity: deep thinker or fast answers](https://suiteintent.com/compare/claude-vs-perplexity)
- [NotebookLM vs Perplexity: your files or the web](https://suiteintent.com/compare/notebooklm-vs-perplexity)
- [Perplexity vs Elicit: web answers or paper reviews](https://suiteintent.com/compare/perplexity-vs-elicit)

## Questions

### Perplexity, NotebookLM or Claude for researching a topic?

Perplexity fits open questions about the world, since it searches the web and shows the sources behind each answer. NotebookLM fits when the answer must come from your own material, such as a folder of reports or interview notes. Claude is strong at reading long documents and reasoning through them, for example comparing two contracts. Many people use Perplexity to find sources and NotebookLM or Claude to work through them.

### Can I research with AI without a subscription?

NotebookLM, Claude, Elicit and ChatGPT can all be used without paying. Elicit's free plan runs on credits, so heavy literature reviews need a paid tier. Paid plans across these tools add more usage, longer reports and team workspaces. Start free on one real question and upgrade the tool you return to.

### Is Perplexity or NotebookLM worth adding to a ChatGPT subscription?

ChatGPT searches the web, analyses files and answers everyday questions, which covers a lot of research. Perplexity is built around sources: every claim links back, and you can narrow the search to academic or specific sites. NotebookLM keeps answers inside your own documents and cites the passage, which reduces made-up details. Add one of them if you often need to show where a fact came from.

### How do I check that an AI research answer is correct?

Open the cited source and find the sentence the answer relies on, especially for numbers, dates and quotes. Perplexity and NotebookLM make this quick because each answer links to its source or passage. Ask the same question a second way and compare the results. For anything you publish or base a decision on, confirm the key fact in a primary source.

### Can I use these tools for academic or scientific research?

Elicit is built for it: it searches scientific papers, summarises findings and extracts data from studies into tables. Perplexity can narrow its search to academic sources. NotebookLM works well once you have the papers, answering questions across them with citations. Check your university's or journal's rules on AI use before you rely on any of them in published work.