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Best AI Tools for Research

The AI tools that do research best, ranked, with prices.

  1. 1

    ChatGPT

    OpenAI's assistant for chat, writing, images, research and code.

    The widest all-in-one assistant; start on Free and upgrade only if you hit the limits.

    Free plan + paidFrom €8/month
    Review Pricing Visit
  2. 2

    Claude

    Anthropic's assistant for writing, long documents and code.

    Strong pick for long documents and coding; Pro adds Claude Code.

    Free plan + paidFrom $20/month
    Review Pricing Visit
  3. 3

    Gemini

    Google's assistant, built into Gmail, Docs and Android.

    Best value if you already use Google apps every day.

    Free plan + paidFrom €4.99/month
    Review Pricing Visit
  4. 4

    Perplexity

    AI search that answers with sources.

    The research-first pick when you need to see where an answer came from.

    Free plan + paidFrom US$17/month
    Review Pricing Visit
  5. 5

    DeepSeek

    Free AI chat from China's DeepSeek, strong at maths and code.

    A capable free option, especially for maths and code.

    Free
    Review Pricing Visit