Automate citation and reference management, aid research with text and data mining, and securely store and share documents.
15M visits/mo+13.2%#12 Productivity & Office
Liner
AI research assistant that finds trusted sources, summarizes documents and videos, and generates cited answers with a browser extension for capturing findings.
$26.99Starting price
7.2MMonthly visits
64Popularity
About Liner
Liner is a web-based AI research assistant designed for researchers, students, academics, and content creators who need faster access to trusted, citable sources. It provides citable research search that surfaces real-time information from reliable sources and returns answers with references. Users can summarize text, web pages, PDFs, and YouTube videos to extract key points without reading everything end to end. The browser extension allows highlighting on web pages, YouTube, and images, with color-coded highlights and comments for organizing findings. Liner also offers AI agents and Copilot chats for tasks such as literature reviews, gap finding, and generating research outputs with verifiable citations. The tool supports both a research workspace, including features like Literature Review and Citation Recommender, and a browser extension for capturing sources while browsing. It is available via a freemium model with usage limits on the free Basic plan and paid tiers including Essential, Professional, and Team plans.
Key features
- Citable research search with real-time sources and referenced answers
- Summarization for text, web pages, PDFs, and YouTube videos
- Browser extension with color-coded highlights and comments
- AI agents for literature reviews, gap finding, and research outputs
- Research workspace with tools like Literature Review and Citation Recommender
- File and URL upload for PDF Copilot and document analysis
- Verifiable citations for generated answers
- Freemium pricing with Basic, Essential, Professional, and Team plans
Use cases
- Academic study and literature review
- Blog writing and content creation
- Researching competitors or topics
Pros
- Provides citable research search with real-time information from reliable sources and verifiable citations
- Offers AI agents and Copilot chats for tasks like literature reviews, hypothesis generation, and citation recommendations
- Supports summarization of text, web pages, PDFs, and YouTube videos to extract key points efficiently
- Includes a browser extension for highlighting and organizing findings on web pages, YouTube, and images with color-coded annotations
- Available as a freemium model with usage limits on the free Basic plan and paid tiers for expanded features
Cons
- Usage limits on the free Basic plan may restrict access to advanced features
- Requires reliance on external sources for citations, which may introduce variability in source reliability
- Browser extension functionality depends on the user's browsing environment and may not capture all content types
Frequently asked questions about Liner
What is Liner and who is it designed for?
Liner is an AI-powered research assistant designed for professionals, researchers, students, academics, and content creators who need faster access to trusted, citable sources.
How does Liner differ from Liner Scholar and Liner Write?
Liner offers general AI-powered search and research capabilities, while Liner Scholar is tailored for academic research workflows and Liner Write focuses on professional writing tasks.
Can I use Liner on mobile devices?
Yes, Liner provides mobile applications for iOS and Android devices.
Does Liner support integrations with other tools or platforms?
Liner offers a dedicated API for developers to integrate its capabilities into other workflows or applications.
What are the main features of Liner for academic research?
Liner Scholar includes features such as finding and comparing papers, generating literature reviews, and providing robust citation recommendations.
How does Liner ensure the accuracy of its answers?
Liner provides cited answers with clickable references, allowing users to verify sources and deepen their understanding of complex topics.
Liner traffic & engagement
liner.com · third-party estimates from Similarweb
Data as of Sep 2026Full AI website ranking →
Monthly visits · Sep 20267.2M-12% MoM12-month high 8.8M (Jul 2026)
Rank among AI websites#108▼ 4 vs last monthof 8,652 tools on aitoolnavio™
Top marketUnited States24.8%Top 5 countries bring 74% of visits
Average visit2mLonger than 76% of AI sites
Pages per visit2.01More than 57% of AI sites
Bounce rate58%Leave after one page · lower is better
Similarweb global rank#9,775#415 in Thailand
Traffic trend
Last 4 months · grows by one month every month
- Jun 20266.9M
- Jul 20268.8M+28.5%
- Aug 20268.2M−7.3%
- Sep 20267.2M−12%
Top countries
Share of visits · estimated visits
Other countries: 26.3%
Visits sent by AI assistants
How people reach this site from other AI tools
37K a month · 0.5% of all visits
Compared with similar tools
Productivity & Office · Sep 2026
Traffic figures are third-party estimates, good for scale and trends; they can differ from a company's own numbers. Updated monthly.
