Perplexity AI

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AI-powered conversational search engine that produces synthesized answers with cited web sources.

Last updated August 27, 2026

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Overview

Perplexity AI is a privately held American artificial-intelligence software company best known for a conversational search service that combines large language models with real-time web retrieval. Instead of presenting only a ranked list of links, the service attempts to interpret a question, gather relevant online material, and produce a direct answer with citations to the sources it used. This positioning places Perplexity between a conventional search engine, an answer engine, and a generative-AI assistant. The company was founded in August 2022 by Aravind Srinivas, Denis Yarats, Johnny Ho, and Andy Konwinski. Its principal search product launched publicly on December 7, 2022. The founders brought experience in machine learning, artificial intelligence, software engineering, and backend systems. Perplexity initially attracted attention by emphasizing current information, source links, conversational follow-up questions, and a relatively simple interface compared with general-purpose chatbot products. Perplexity operates a freemium model. Its public search experience is available without charge, while Perplexity Pro provides expanded access to advanced models, higher usage limits, document analysis, and additional research capabilities. The platform can route requests to different underlying models, including models developed by Perplexity and models supplied by other AI companies. Its Sonar family is positioned as a search-oriented model and is used in the company’s developer-facing search infrastructure. The company has also introduced R1 1776, an internally developed model based on DeepSeek R1. The brand has expanded beyond a web search page. Products and features associated with Perplexity include a browser extension, iOS and Android applications, Perplexity Pages for creating structured content, finance tools, shopping recommendations, an AI Assistant for carrying out actions across applications, Internal Knowledge Search for querying company documents alongside the web, and a Search API for developers. In 2025 it introduced Comet, a Chromium-based browser integrating Perplexity’s search and task capabilities. The company has also pursued enterprise use cases, partnerships with publishers, and integrations with external platforms. Perplexity’s growth has been accompanied by significant controversy. Publishers and media companies, including Forbes, Dow Jones, the New York Post, The New York Times, the BBC, and Japanese newspaper groups, have alleged that the service reproduces or accesses copyrighted material without adequate permission, licensing, attribution, or compensation. Some allegations also concern fabricated or incorrectly attributed quotations in generated responses. Investigations by Wired, independent researchers, and Cloudflare further alleged that Perplexity-associated crawlers used undisclosed infrastructure or spoofed user-agent information to access sites that attempted to restrict automated collection. Perplexity has disputed aspects of those claims and has argued that its system aggregates information while expressing willingness to develop revenue-sharing arrangements with publishers. The company remains private and has been financed by venture investors and strategic backers, including technology and AI-focused investors. Its principal public face is co-founder and chief executive Aravind Srinivas. Perplexity’s long-term position depends on whether it can maintain answer quality and user trust while resolving publisher relationships, copyright questions, crawler-governance concerns, infrastructure costs, and competition from established search companies and general-purpose AI platforms.

History

Perplexity AI was established in August 2022 by Aravind Srinivas, Denis Yarats, Johnny Ho, and Andy Konwinski. The founding team combined experience in machine learning, artificial intelligence research, backend engineering, and software systems. Their objective was to create a search experience in which a user could ask a question in natural language and receive a concise, conversational response supported by links to source material. The company released its principal search engine on December 7, 2022. Its early differentiation came from combining language-model generation with live web retrieval. Rather than treating the language model as an isolated knowledge base, Perplexity designed the service to consult current online content and expose citations alongside its answers. This approach made the product useful for research, news-oriented questions, explanations, and follow-up conversations, although it also created risks involving inaccurate synthesis, incomplete citations, and the reproduction of publisher content. Perplexity expanded access through web, mobile, and browser products. It released applications for iOS and Android and developed a Chrome extension. The company introduced a paid Pro tier with access to stronger models, increased capabilities, document uploads, and additional research functions. It also developed enterprise-oriented features that allow users to search internal files together with public web material. Supported files include common office and document formats, enabling the product to serve as a workplace knowledge-search tool rather than solely a public web interface. The company broadened its commercial scope through developer infrastructure and vertical features. Its Search API provides programmatic access to Perplexity’s retrieval capabilities, while the Sonar model family is designed for search-related workloads. Finance features support market and company research, and Shopping Hub applies conversational recommendation to product discovery and purchasing. In January 2025, Perplexity introduced an Assistant designed to carry out actions across applications and to use multimodal inputs such as a phone camera. In July 2025, it introduced Comet, a Chromium-based browser that placed Perplexity’s search and task tools within the browsing environment. Perplexity’s growth brought substantial attention from investors, publishers, technology companies, and competitors in search and generative AI. The company remained privately held and raised capital from a range of venture and technology investors. Its chief executive, Aravind Srinivas, became the principal public spokesperson for the business and regularly described the company as an alternative to conventional search and advertising-led information discovery. The central challenge in Perplexity’s history has been its relationship with the open web. In 2024, Forbes criticized the company over an answer that allegedly reproduced material from a proprietary article. Dow Jones and the New York Post sued over alleged copyright infringement and inaccurate attribution, while The New York Times sent a cease-and-desist notice. Perplexity responded that its system aggregates information rather than plagiarizing it and stated that it was open to commercial arrangements with publishers. Further disputes followed in 2025. The BBC demanded that Perplexity stop using its material without authorization and address alleged retention of BBC content. Japanese newspaper companies filed lawsuits alleging extensive unauthorized use of their articles, and Reddit later brought a claim concerning alleged data scraping. Separately, investigations by Wired, independent researchers, and Cloudflare questioned whether Perplexity-associated crawlers consistently respected robots.txt and published crawler-identification practices. Perplexity rejected important parts of those allegations. These disputes have made licensing, attribution, crawler transparency, and the legal status of AI search central to the brand’s public identity. Perplexity is therefore best understood as both an AI application company and a search-infrastructure company. Its brand promise rests on speed, direct answers, current information, and visible sourcing. Its future development depends on improving factual reliability, expanding paid and enterprise use, controlling infrastructure costs, and establishing sustainable relationships with the publishers and websites whose content supplies the information layer behind its answers.

2025
Assistant launched
[1]Perplexity AIen.wikipedia.org
Perplexity released a multimodal assistant intended to perform actions across applications and maintain context across tasks.
2025
Comet browser launched
[1]Perplexity AIen.wikipedia.org
The company launched Comet, a Chromium-based browser integrating Perplexity search and AI task assistance.
2024
Publisher program announced
[1]Perplexity AIen.wikipedia.org
Perplexity announced a publisher program intended to share advertising revenue with participating content partners.
2024
Finance tools introduced
[1]Perplexity AIen.wikipedia.org
The service added features for market-price tracking, earnings information, peer comparisons, and basic financial research.
2024
Shopping Hub launched
[1]Perplexity AIen.wikipedia.org
Perplexity introduced an AI-powered shopping experience for recommendations and product discovery.
2023
Early public adoption reported
[1]Perplexity AIen.wikipedia.org
Perplexity reported substantial early visitor activity as the answer-engine category began attracting wider public attention.
2022
Company founded
[1]Perplexity AIen.wikipedia.org
Perplexity AI was founded in August by Aravind Srinivas, Denis Yarats, Johnny Ho, and Andy Konwinski.
2022
Main search engine launched
[1]Perplexity AIen.wikipedia.org
The company launched its conversational search engine on December 7, combining generative answers with web citations.

Products and positioning

A premium, citation-oriented AI answer engine that combines conversational interaction, large language models, and real-time web search.

Conversational AI search engine · 2022
Perplexity Search
Perplexity’s core public service accepts natural-language questions and generates synthesized responses by combining large language models with real-time web retrieval. Answers normally include citations or links to the material consulted, allowing users to inspect supporting sources. The product follows a freemium model and is available through the web, mobile applications, and browser integrations. Its principal differentiation is the attempt to provide a researched answer rather than merely a page of search results.
Paid AI search subscription
Perplexity Pro
Perplexity Pro is the company’s paid tier for users who need greater access to advanced models and research functions. Depending on the product configuration, it supports model selection, higher usage allowances, document uploads, and access to API or enterprise-oriented capabilities. The service is positioned for intensive individual research and professional use, extending the free answer-engine experience with broader tools and controls.
Search-oriented AI model and API
Sonar
Sonar is Perplexity’s search-oriented model family and a foundation of its developer-facing retrieval infrastructure. It is designed to support applications that need current information, generated responses, and web-grounded results. Perplexity has described Sonar as being based on Meta’s Llama model family. The associated Search API gives developers programmatic access to Perplexity’s search capabilities.
Enterprise knowledge management
Internal Knowledge Search
Internal Knowledge Search allows Pro and Enterprise Pro users to search public web content and uploaded internal material in a combined workflow. It supports common business file types such as PDF, Word, and Excel documents. The feature is intended to help employees answer questions using both external research and organizational records, making Perplexity relevant to enterprise knowledge retrieval and document analysis.
AI shopping and product discovery · 2024
Shopping Hub
Shopping Hub applies Perplexity’s conversational interface to product research. It generates recommendations and helps users compare or discover products, with the broader objective of supporting purchases inside the search experience. The product extends the brand from information retrieval into commerce while retaining its emphasis on natural-language questions and synthesized guidance.
Multimodal AI assistant · 2025
Perplexity Assistant
The Perplexity Assistant is designed to move from answering questions to carrying out actions. It can maintain context, interact with selected applications, and support tasks such as arranging a ride or identifying music. Its multimodal functions can use a phone camera or on-screen content as input. Perplexity has acknowledged that some functions remain experimental and may require user-configured workarounds.
AI web browser · 2025
Comet
Comet is a Chromium-based browser built around integrated Perplexity search. It can assist with article summaries, image descriptions, topic research, and drafting communications while the user browses. Its strategic purpose is to place AI search directly inside the browsing environment rather than requiring users to switch between a search page and other applications.
Large language model
R1 1776
R1 1776 is a Perplexity-developed model based on DeepSeek R1. It represents the company’s effort to offer proprietary or customized model capabilities alongside access to external model providers. The model is associated with Perplexity’s broader strategy of controlling parts of the technology stack behind its search and answer products.

Controversies

2025
BBC and Japanese publisher legal disputes
The BBC demanded that Perplexity stop unauthorized use of its material and address alleged retention of BBC content. Yomiuri Shimbun, The Asahi Shimbun, and Nikkei separately brought claims alleging unauthorized use of large quantities of newspaper content.
Source
2025
Allegations concerning stealth web crawlers
Investigations by Wired and independent researchers, followed by Cloudflare research, alleged that Perplexity-associated crawlers used undisclosed IP infrastructure or spoofed user-agent strings and did not consistently honor robots.txt restrictions. Perplexity denied key elements of the allegations and criticized Cloudflare’s presentation.
Source
2025
Trademark lawsuit by Perplexity Solved Solutions
Perplexity Solved Solutions sued Perplexity AI, alleging that the latter’s use of the Perplexity name infringed a registered trademark and could confuse consumers. The claimant reportedly said that an earlier offer to purchase the mark had not been accepted.
Source
2025
Reddit data-scraping lawsuit
Reddit sued Perplexity and other companies, alleging unlawful scraping and use of Reddit data. The dispute added a platform-data dimension to the company’s existing publisher and crawler controversies.
Source
2024
Copyright and attribution disputes with publishers
Forbes, Dow Jones, the New York Post, and The New York Times raised allegations that Perplexity reproduced, accessed, or relied on publisher content without adequate authorization or attribution. The Dow Jones and New York Post litigation also alleged that generated answers included inaccurate quotations attributed to news coverage. Perplexity disputed the characterization of its system as plagiarism and said it was open to revenue-sharing relationships.
Source

2024Publisher revenue-sharing program
United States · Global
Perplexity announced a program intended to share advertising revenue with publishers whose content contributed to the company’s answer ecosystem. The initiative was presented as a way to create a commercial relationship with content producers amid growing concerns about AI search and publisher economics.
Outcome. The program did not eliminate broader disputes over scraping, attribution, licensing, and copyright.
Source

Brand decisions

2025
Extend the brand into browser-based AI assistanceProduct launch
Background
Perplexity sought to make its search and task functions available throughout the browsing experience.
Action taken
The company launched Comet, a Chromium-based browser incorporating search, research, summarization, and task assistance.
Aftermath
The launch broadened Perplexity’s competitive scope from search software toward browser and agent experiences.
Source
2024
Pursue publisher partnerships and revenue sharingStrategy
Background
Publishers questioned whether AI-generated answers could use their reporting without creating licensing or compensation obligations.
Action taken
Perplexity announced a publisher program intended to share advertising revenue with participating partners.
Aftermath
The initiative coexisted with continuing copyright, attribution, and web-crawling disputes.
Source
2022
Launch a citation-oriented conversational search engineProduct launch
Background
The founders sought to make web research more direct and conversational than a conventional list of ranked links.
Action taken
Perplexity launched a service that uses language models to synthesize web-retrieved information and display supporting citations.
Aftermath
The model became the foundation for the company’s consumer, enterprise, and developer products.
Source

Recent events

2025
Perplexity proposes a transaction involving TikTok US[1]Perplexity AIen.wikipedia.org
M&A
Ahead of a potential United States restriction on TikTok, Perplexity submitted a proposal concerning a merger with TikTok’s United States operations.
2025
Perplexity launches its AI Assistant[1]Perplexity AIen.wikipedia.org
Product launch
The company introduced a multimodal assistant intended to search, maintain context, interact with applications, and perform tasks such as ride-hailing or media discovery.
2025
Perplexity introduces the Comet AI browser[1]Perplexity AIen.wikipedia.org
Product launch
Perplexity launched Comet, a Chromium-based browser with integrated search, research, summarization, image understanding, and assistance with tasks such as drafting email.
2024
Perplexity announces a publisher revenue-sharing program[1]Perplexity AIen.wikipedia.org
Campaign
The company announced a program intended to share advertising revenue with participating publishing partners as it sought to address concerns about the economic effects of AI-generated answers.
2024
Perplexity introduces finance features[1]Perplexity AIen.wikipedia.org
Product launch
The platform added finance-oriented tools for tracking market prices, company earnings, peer comparisons, and basic financial information.
2024
Perplexity launches Shopping Hub[1]Perplexity AIen.wikipedia.org
Product launch
Perplexity introduced an AI-assisted shopping experience that recommends products and supports purchase journeys within its interface.
2022
Perplexity AI launches its conversational search engine[1]Perplexity AIen.wikipedia.org
Product launch
Perplexity publicly launched its main search product, presenting synthesized answers with links to supporting web sources.

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