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Perplexity

by Perplexity AI

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Best for

People who want answers with source citations. The Pro plan is aimed at those who want advanced AI models, deep research and image and video generation.

Verified on October 17, 2026 · Official source

About

AI search engine that answers questions with cited sources, with a deep research mode and a choice of models.

Why it ranks #1

Best everyday search-with-citations experience, fast and with a free tier.

Criteria used for Research and study

Citation reliability, source coverage (web or scientific papers), ability to work with your own documents and free tier.

Pricing

  • Has a free plan
  • Paid plans from US$ 20/month

On the free plan

Free plan (US$0/month): search with answers and citations, limited daily usage, citations in every answer, access to basic AI models, basic file uploads and a limited amount of Pro Searches.

Verified on October 17, 2026 · Official source

Prices change often; check the official site.

Portuguese support?

Yes

Verified on October 17, 2026 · Official source

Pros / Cons

Pros

  • Free plan with source citations in every answer
  • The Pro plan gives access to advanced AI models and image and video generation
  • Supports search in Portuguese (pt language code)

Verified on October 17, 2026 · Official source

Cons

  • The Free plan has limited daily usage and a limited amount of Pro Searches
  • Advanced AI models and image/video generation require a paid plan
  • Prices displayed in US dollars (US$), not Brazilian Reais

Verified on October 17, 2026 · Official source

FAQ

Does Perplexity have a free plan?
Yes. The Free plan costs US$0/month and includes search with answers and citations, access to basic AI models and limited daily usage.
Does Perplexity work in Portuguese?
Yes. The official documentation lists Portuguese (pt code) among the supported search languages.

Verified on October 17, 2026 · Official source

Alternatives in Research and study

  1. #2Gemini NotebookGoogle
  2. #3ElicitElicit
  3. #4ConsensusConsensus
  4. #5Semantic ScholarAi2 (Allen Institute for AI)
  5. #6SciteScite (Research Solutions)
  6. #7UndermindUndermind
  7. #8ScholarcyScholarcy

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