Perplexity

Perplexity is an AI-powered answer engine that searches the live web, picks the trustworthy sources, and writes a cited answer in the time a Google search results page takes to load. We rate it 86/100 — it is the best place on the internet to ask a factual question right now, even if it still trails ChatGPT for raw creative writing and complex reasoning.

What is Perplexity?

Perplexity was founded in August 2022 by Aravind Srinivas (ex-OpenAI, DeepMind), Denis Yarats (ex-Meta AI), Johnny Ho and Andy Konwinski, and went public with its consumer product on December 7, 2022. By April 2026 the company had crossed $450M in annual recurring revenue, 34 million monthly active users, and a $21.21 billion valuation after its Series E-6.

Unlike ChatGPT or Gemini, Perplexity is built around grounded retrieval first. Every answer is generated from a fresh web search, every claim has a numbered citation you can click, and the underlying model is swappable — you choose between GPT-5.5, Claude Opus 4.6, Sonar (Perplexity's own model), Gemini, Grok and others depending on tier. The current consumer flagship is the Comet AI browser, free since March 18, 2026 on iOS, Android, Windows and Mac.

Key Features of Perplexity

• Cited answers by default: Every response is footnoted with the URLs that produced it. Click a number, see the page. This single design choice is what kept Perplexity ahead of Google AI Overviews and ChatGPT Search through 2025 and 2026.
• Multi-model selector: Pro and Max users can route queries to GPT-5.5, Claude Opus 4.6, Sonar Large, Gemini 2.5 Pro, Grok 4 and o4-style reasoning models — useful when one model hallucinates and another doesn't.
• Deep Research: Spawns a multi-step research agent that browses 30–100 sources, then writes a structured report with a downloadable PDF. Pro gets unlimited Deep Research; Free gets 5 per day.
• Spaces: Persistent project workspaces with custom system prompts, file uploads (up to 50MB on Pro), and shared context. Effectively a private RAG without setup.
• Comet browser: A Chromium fork with the Perplexity assistant docked in the sidebar. Reads the active tab, runs agentic actions (fill a form, summarise a PDF, check a flight), and syncs sessions across devices.
• Sonar API: The same retrieval pipeline behind the consumer app, exposed as a developer API at $1/M input tokens and $5/1,000 grounded queries on the standard tier.
• Voice and macOS app: Native macOS, Windows, iOS and Android apps with hands-free voice mode and Spotlight-style global search.

What Users Say About Perplexity

On Reddit's r/perplexity_ai and r/ChatGPT, the most upvoted thread of the last quarter is a head-to-head where Perplexity wins on "verify a fact in 10 seconds" and loses on "write me a marketing email." Across G2, Capterra and Hacker News, the recurring praise is the same three things: the citation UI, the speed (median answer in 3–5 seconds), and the quality of source selection — Perplexity now reliably preferences primary sources over SEO blog spam.

Complaints are also consistent. Multiple Reddit threads describe Deep Research occasionally inventing or misattributing citations, especially on niche academic topics. Coding and pure math are a known weak spot — users keep ChatGPT or Claude open for those. And every public test in 2025-2026 found that the agentic shopping flows in Comet still fail more often than they succeed once a checkout flow involves a captcha or a complex modal. Privacy-minded users on Hacker News also flag the data-retention defaults: Pro and Free both retrain on your queries unless you turn it off in settings.

Perplexity Pricing

Perplexity is freemium. The free tier is genuinely useful (about 5 Pro searches per day plus unlimited basic searches), and Pro at $20/month is competitive with ChatGPT Plus and Claude Pro while bundling $5/month of API credit. Comet, the AI browser, is free on every plan as of March 2026.

Plan	Price	Key Limits
Free	$0/month	~5 Pro searches/day, basic models, Comet browser, citations
Education Pro	$10/month	Verified students; same as Pro
Pro	$20/month ($200/yr)	Unlimited Pro searches, all models, unlimited Deep Research, $5/mo API credit
Max	$200/month ($2,000/yr)	Highest model limits, Computer agent, 10,000 credits/mo, dashboards & spreadsheets
Enterprise Pro	From $40/seat/mo	SSO, admin controls, no training on data, SOC 2
Enterprise Max	$325/seat/mo ($3,250/yr)	Computer for teams, advanced governance, dedicated support

Who Should Use Perplexity?

Best for: researchers, journalists, analysts, lawyers, founders doing market research, students writing papers, and anyone whose job is to verify a claim and cite a source. If "prove it" is a question you ask a chatbot, Perplexity is the right tool.

Not ideal for: heavy code generation (Cursor or Claude Code is better), long-form creative writing (ChatGPT is still the leader), and offline or fully private workflows (try LM Studio with a local model).

Pros and Cons

Pros:

• Best-in-class citation UI — sources are inline, numbered, and clickable
• Lowest measured hallucination rate among consumer chat tools (3–8% on factual queries, per third-party benchmarks)
• Generous free tier and a free AI browser as of 2026
• Multi-model selector means you are not locked to one vendor
• Sonar API is one of the cheapest grounded-search APIs on the market

Cons:

• Deep Research can fabricate or misattribute citations on niche topics
• Coding and math trail ChatGPT and Claude
• Default data settings opt you into training — you must toggle it off
• Comet's agentic shopping and form-filling are still flaky in practice
• Several active copyright lawsuits from publishers (Forbes, Wired, NYT-adjacent) cloud the long-term licensing picture

Alternatives to Perplexity

ChatGPT Search closed most of the gap in 2025 and is the better creative writer. Claude wins for nuanced reasoning and code. Linkup and Exa are the closest API-only competitors to Sonar. Phind and You.com remain niche but capable for developer-flavoured search.

Verdict: Is Perplexity Worth It?

If you spend any meaningful time on Google for research, Perplexity Pro at $20/month pays for itself within a week. The free tier alone is enough to displace 70% of casual search behaviour, and the Sonar API gives developers a credible grounded-search backend without building their own retrieval pipeline. It is not a ChatGPT replacement — it is a Google replacement, and a much better one. Score: 86/100.

Frequently Asked Questions

Is Perplexity free?

Yes. Perplexity has a free plan with about 5 Pro searches per day, unlimited basic searches, citations, and free access to the Comet AI browser. Pro starts at $20/month and Max at $200/month.

What platforms does Perplexity support?

Web, native macOS, native Windows, iOS, Android, and the Comet browser on all four desktop and mobile platforms. There is also a public Sonar API for developers.

How does Perplexity compare to ChatGPT?

Perplexity is built around live web search with citations, so it wins for factual research, news, and "prove it" questions. ChatGPT wins for creative writing, code generation, and complex multi-step reasoning. Most power users keep both.

Is Perplexity open source?

No. Perplexity is closed-source. The company publishes some research and an API cookbook on GitHub at github.com/ppl-ai, but the core product, retrieval pipeline, and Sonar models are proprietary.

Does Perplexity train on my data?

By default yes on Free and Pro. Open Settings → Account → "AI data retention" and toggle it off. Enterprise plans are no-train by default and SOC 2 audited.