Perplexity

Situational

AI search engine that answers questions with cited sources

213 reviews

Free tierHas API

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In a nutshell

The best AI research tool available. Citations change the game for trust and fact-checking. Free tier is generous enough to evaluate properly.

What's great

Inline citations for every answer
Excellent search quality
Strong free tier

Watch out for

Pro search limits on free plan
Can hallucinate despite citations
No document collaboration

Best for

Researchers and content creators needing sourced answers

Not ideal for

Creative writing or fiction

Pricing

Free

Free (limited Pro searches)

Starter

$20/mo (Pro)

Pro

$40/mo (Enterprise)

Enterprise

Custom

View official pricing →

How it compares

Claude

4.6

The thoughtful AI. Best-in-class for long documents, nuanced writing, and careful reasoning.

ChatGPT

4.5

The AI assistant that started the revolution. General-purpose, conversational, wildly capable.

Grammarly

4.5

The gold standard in grammar checking, now with AI writing assistance baked in.

See full comparison →

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