Liner AI
4.3 3 reviews

Liner AI

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About

Liner AI is an AI-powered search and research assistant that helps users find, highlight, organize, and summarize information from across the web and uploaded documents. Originally launched as a web highlighter tool, Liner has evolved into a comprehensive AI research platform that combines intelligent search with content curation and AI-powered analysis. The platform provides an AI search engine that delivers answers with cited sources from both the open web and academic papers, functioning as an alternative to traditional search engines for research-oriented queries. Users can ask questions in natural language and receive synthesized answers with inline citations linking to the original sources, enabling verification and deeper exploration of the referenced material. Liner's highlighting and annotation features allow users to mark important passages on any web page, PDF, or document, creating a personal knowledge library of curated content that can be searched, organized, and referenced later. The AI assistant can analyze highlighted content, generate summaries of saved articles, and help users connect ideas across their collected research materials. The platform provides a browser extension for Chrome, Safari, and other browsers that integrates highlighting and AI assistance directly into the browsing experience, as well as mobile apps for iOS and Android. Liner supports integration with academic databases and can help students and researchers find relevant scholarly papers alongside web sources. The platform offers features for organizing research into collections, collaborating with teams, and exporting annotated content. Liner provides a free tier with limited AI queries and highlighting features. Liner Pro, available through a subscription, offers unlimited AI searches, enhanced summarization, priority response times, and advanced organizational features for power users and research professionals.

AI Research Tools

Liner AI combines AI search with content curation and annotation tools, creating an integrated research assistant. Users can search for information, highlight key passages across web pages and documents, organize findings into collections, and use AI to summarize and connect ideas across their gathered research materials.

AI Search Engines

Liner AI provides an AI-powered search engine that delivers synthesized answers with inline citations from web and academic sources. Users can ask research questions in natural language and receive comprehensive responses with source links, offering an alternative to traditional search engines that is optimized for information gathering and research workflows.

AI Study Tools

Liner AI serves as a study tool by enabling students to highlight and annotate academic content, organize study materials into collections, and use AI to generate summaries and answer questions about their saved content. The platform helps students build organized knowledge libraries from their coursework and research reading.

AI Summarizers

Liner AI provides AI-powered summarization of web pages, articles, and saved content, helping users quickly extract key points and main ideas from lengthy sources. The platform can generate concise overviews of individual articles or synthesize information across multiple highlighted passages and saved research materials.

Tool Details Freemium

Pricing Freemium (Free / Pro ~$9.99/mo)
Platform SaaS
Headquarters Seoul, South Korea
Founded 2015
Free Plan Yes
4.3 3 reviews

AI Reviews

🤖
Claude Opus 4.6 Anthropic
4.1 /5

Liner AI positions itself as a comprehensive research companion that helps users find, highlight, and summarize information across the web. Its standout feature is the ability to surface trusted, credible sources while filtering out low-quality content " a significant advantage for students and researchers alike. The browser extension integrates seamlessly, allowing users to highlight web pages, PDFs, and articles with AI-powered annotations and summaries.

The search functionality delivers curated results with AI-generated answers backed by citations, though it doesn't quite match the depth of dedicated AI search engines like Perplexity. Where Liner truly excels is as a study tool " organizing highlights, generating summaries, and creating a personalized knowledge base that's easy to revisit.

The freemium model is generous enough for casual users, while the Pro plan at roughly $9.99/month unlocks unlimited AI features. Some limitations include occasional summarization inconsistencies with complex academic papers and a mobile experience that could be more polished. Overall, Liner is a solid all-in-one research assistant that bridges the gap between search, reading, and knowledge retention effectively.

Category Ratings

AI Research Tools
4.2
AI Search Engines
3.9
AI Study Tools
4.3
AI Summarizers
4.1
Feb 15, 2026
AI-Generated Review Generated via Anthropic API. This is an automated evaluation, not a consumer review. Learn more
🤖
Gemini 3 Pro Preview Google
4.6 /5

Liner AI effectively transforms the traditional web browsing experience into an active research workflow by combining robust highlighting tools with an intelligent AI workspace. Originally a highlighting utility, it has evolved into a powerful research assistant that allows users to mark up websites and PDFs, then use those highlights to generate insights. Its AI search capabilities stand out by providing answers backed by reliable citations, making it a trustworthy alternative to standard generative chat tools for academic or professional use.

The platform excels as a study aid, offering instant summaries for long articles and YouTube videos, which significantly speeds up information consumption. While the browser extension is feature-rich, the interface can occasionally feel crowded for users seeking a minimalist experience. The freemium model is accessible, though power users will need the Pro plan to unlock advanced models like GPT-4. Overall, Liner is a versatile tool that bridges the gap between content collection and information synthesis.

Category Ratings

AI Research Tools
4.6
AI Search Engines
4.4
AI Study Tools
4.7
AI Summarizers
4.5
Feb 15, 2026
AI-Generated Review Generated via Google API. This is an automated evaluation, not a consumer review. Learn more
🤖
Claude 4.5 Opus Anthropic
4.2 /5
Liner AI positions itself as an intelligent research companion that streamlines information gathering across the web. The tool excels at highlighting and organizing content from various sources, making it particularly valuable for students and researchers who need to synthesize large amounts of information quickly. Its browser extension integrates seamlessly, allowing users to highlight text and generate AI-powered summaries on the fly. The search functionality pulls from trusted sources and provides cited answers, reducing the typical rabbit-hole effect of traditional research. The freemium model is generous enough for casual users, while the Pro tier at approximately $9.99/month unlocks unlimited features that power users will appreciate. Where Liner falls slightly short is in advanced filtering options and export capabilities compared to dedicated research tools like Elicit or Consensus. The mobile experience could also use refinement. Overall, Liner strikes a solid balance between accessibility and functionality, making it an excellent entry point for AI-assisted research without a steep learning curve.

Category Ratings

AI Research Tools
4.2
AI Search Engines
4.0
AI Study Tools
4.3
AI Summarizers
4.1
Feb 12, 2026
AI-Generated Review Generated via Anthropic API. This is an automated evaluation, not a consumer review. Learn more
Liner AI Screenshot

Added: Feb 12, 2026

getliner.com

Categories

AI Research Tools AI Search Engines AI Study Tools AI Summarizers