Sharing a category with Perplexity is what puts a product on this page at all. These 18 search tools are the closest of the ones that do, ordered by how much of Perplexity’s categories and tags each one covers and how closely its own description reads like Perplexity’s — that is an ordering, not a verdict. We have not tested any of them, and there is no score on this page.
Back to the Perplexity listing| Tool | Pricing | Open source | Upvotes here |
|---|---|---|---|
| Inciteful | Free | No | 0 |
| You.com | Freemium | No | 41 |
| NotebookLM | Freemium | No | 10 |
| Jenni | Freemium | No | 0 |
| Andi | Free | No | 0 |
| Humata | Freemium | No | 0 |
| Arena AI | Free | No | 0 |
| ChatPDF | Freemium | No | 0 |
| CustomGPT.ai | Subscription | No | 0 |
| Elicit | Freemium | No | 12 |
| genei | Subscription | No | 0 |
| SciSpace | Freemium | No | 34 |
| Grammarly | Freemium | No | 35 |
| Sourcely | Subscription | No | 0 |
| Cohere | Paid | No | 0 |
| Scholarcy | Freemium | No | 0 |
| Lex | Freemium | No | 37 |
| MindCradle | Freemium | No | 7 |
Discover academic literature using citation networks
Inciteful helps researchers find relevant academic papers by analyzing citation networks rather than relying solely on keywords or citation counts.
AI search and research APIs for developers
You.com started as a consumer AI search engine and now focuses on selling web search, news and research APIs that give agents current, citable data.
Research assistant grounded in your own sources
NotebookLM from Google answers questions only from documents, links and media you upload, citing the exact passage behind each claim, which makes it useful when hallucination is the main risk.
Jenni is an AI workspace built for students, researchers, and academics to read, write, and cite sources. It features smart AI autocomplete that suggests sentences grounded in real papers, traceable inline citations, and…
Andi is an AI search agent that provides concise answers, summarizes web content, and assists with writing and research.
AI-powered knowledge base for document analysis
Humata is an AI agent that turns documents into a searchable knowledge base for instant answers and analysis. The platform allows users to upload files, receive summaries with citations, and ask questions about the conte…
Arena AI is a platform for evaluating and ranking artificial intelligence models through crowdsourced comparisons and real-world interactions.
Chat with any PDF document using artificial intelligence
ChatPDF allows users to upload PDF documents, books, and research papers to ask questions, extract summaries, and find information through a conversational interface.
Build custom AI agents from your business content
CustomGPT.ai is a no-code platform that builds custom AI agents powered by large language models tailored to business content.
Elicit searches a corpus of over one hundred million papers, extracts findings into comparison tables and summarises what a body of research collectively says about a question.
AI-powered summarisation and research assistant
Genei is an AI-powered research and summarization tool that helps users process articles, PDFs, and webpages quickly.
Read, search and question research papers with AI
SciSpace searches a large corpus of academic literature and lets you ask questions of a specific paper, with explanations of dense passages, maths and tables.
Grammarly checks grammar, spelling, clarity and tone as you write in the browser, desktop apps, email clients and mobile keyboards.
Find academic sources and citations with AI
Sourcely is an AI-powered academic search assistant that helps users find credible research papers, generate summaries, and export citations.
Enterprise AI platform for search, models, and automation
Cohere provides generative AI models, enterprise search tools, and retrieval systems designed to help businesses automate workflows and analyze data.
AI-powered research summarizer and organizer
Scholarcy is an AI-powered tool designed to help students and researchers summarize, analyze, and organize academic papers, articles, books, and videos.
Lex is a clean document editor aimed at people who write prose rather than marketing copy. It offers inline drafting help, but its distinctive feature is structured feedback: you can ask for a critique of an argument, cl…
MindCradle is a wellness journal that tracks moods and daily routines and uses an assistant called ARIA to surface emotional patterns across entries rather than treating each day in isolation.
This site holds four things about each of these products that are worth comparing before you open any of them, and none of them is an opinion. The pricing model above is the one recorded on the listing — a product marked Contact for pricing will cost you a sales call before it costs you anything else. The open-source column decides whether leaving later is a migration or an export. The shared categories and tags under each entry are how close the overlap with Perplexity actually is: a tool covering all of Perplexity’s categories is doing roughly the same job, one sharing a single category may only touch the same part of it — and a tool can be high on this page on the strength of its description alone, which means it describes the same work in the same words rather than that anybody checked it does that work well. Upvotes are votes cast here by people with accounts, and they say what this site’s readers picked, not what is best for you.
What we do not hold is a test. Nobody here has run these products side by side, so the last step is yours: open two of them and give each one the job you actually have.