Perplexity

Perplexity AI is built around one core principle: AI should show its work. Founded in 2022 by former OpenAI engineers, Perplexity functions more like a research assistant than a conversational chatbot — every answer includes numbered citations linking to primary sources, so users can verify claims directly.

**What Perplexity Does Best**

Perplexity's web search is its defining capability. Unlike other AI assistants that add search as a feature, Perplexity was built search-first. It synthesizes multiple sources into a coherent answer rather than returning a list of links. The Focus modes let you search specific sources — academic papers, YouTube, Reddit, or the broader web — with appropriate weighting for your question type.

**Pricing**

Free users get unlimited web searches using Perplexity's own models, with daily limits on Pro searches. Perplexity Pro at $20/month unlocks GPT-4o, Claude 3.7 Sonnet, and Grok 3 as model choices, plus higher file upload limits and expanded research assistant features.

**Who Should Use Perplexity?**

Perplexity is the best tool for research-heavy tasks where source verification matters: academic research, competitive intelligence, news monitoring, and fact-checking technical claims. It is also excellent for finding primary documentation on specific topics rather than a model's paraphrase of information it was trained on.

**Limitations**

Perplexity is not the right tool for creative writing, coding assistance, or extended conversational tasks — it was purpose-built for information retrieval, and general chatbot workflows are not its strength. The free tier limits on Pro models can be restrictive for power users who rely on it for professional research.