What is Liner?
Liner is an AI search and research platform that answers questions with source citations and helps you find and compare academic papers. It serves students, researchers and professionals through three tools for search, scholarly research and writing, and runs on the web, iOS, Android, Mac, Windows and Chrome or Edge extensions.
General chatbots often give answers you cannot trace back to a source, which is a problem for coursework, literature reviews and client reports. This tool puts citations at the center: each answer links to its sources, a scholar mode searches papers and drafts literature reviews, and a writing workspace combines searching, drafting and editing in one place. Paid plans let you switch among major models such as ChatGPT, Gemini and Claude.
Main Features
- Answers questions with inline citations, suggested follow-up questions and mind maps for complex topics.
- Finds academic papers, compares studies and generates literature reviews in the Scholar tool.
- Recommends citations and includes research agents such as a hypothesis generator and a survey simulator.
- Combines search, drafting and editing for emails, newsletters and reports in the Write tool.
- Accepts file uploads for analysis, from 25 MB per file on the free plan up to 200 MB on Max.
- Includes Deep Research and image generation on the free plan.
- Runs on iOS, Android, Mac and Windows, plus Chrome and Edge browser extensions.
- Provides an API and MCP integrations for its Search and Scholar agents.
How to Get Started with Liner
- Sign up free at app.liner.com or install the Chrome or Edge extension.
- Ask a question, or switch to Scholar to search academic papers.
- Check the cited sources, then ask follow-ups or upload a PDF to analyze.
- Upgrade to Pro or Max if you need more uploads, no ads and a choice of AI models.
Liner Pricing
The free plan includes unlimited advanced search, Deep Research and one 25 MB file upload per day, with ads. Pro costs $14.99 per month billed annually ($17.99 monthly), Max $29.99 per month billed annually, and Team $26.99 per seat per month.
Who Should Use It?
- Undergraduate and graduate students writing papers and literature reviews
- Research scientists screening and comparing studies
- Consultants and strategists who need sourced facts for client reports
- Product managers researching markets and competitors
- Content editors fact-checking drafts before publishing
Liner Alternatives
- ChatOS AI: organizes AI chats on a visual canvas, less research-focused
- Reflect: AI note-taking app, better for building your own knowledge base
- Relevance AI: builds custom AI agents rather than answering research questions
Frequently Asked Questions
Is Liner free?
Yes, there is a free plan with unlimited advanced search, Deep Research and image generation, but it shows ads and allows one 25 MB upload per day. Pro, from $14.99 per month billed annually, removes ads and adds model choice and 20 uploads daily.
Does Liner cite its sources?
Yes. Every search answer links to the sources it drew from, and the Scholar tool works directly with academic papers, citation recommendations and literature reviews, so you can verify claims before using them in coursework or reports.
Does it have a mobile app or API?
Yes. There are iOS and Android apps, desktop apps for Mac and Windows, and Chrome and Edge extensions. Developers can use the company's API and MCP integrations for the Search and Scholar agents.