Liner

Liner is an AI search and research assistant tool that provides cited answers, academic paper analysis, and writing features.

Liner is an AI-powered search and research assistant built for professionals, academics, and writers. It provides accurate, cited answers, processes complex topics with mind maps, and helps find and compare academic papers. Users can upload documents and PDFs to receive summaries, and draft reports, emails, or newsletters in one workflow. The platform integrates major AI models including ChatGPT, Gemini, and Claude. It features specialized tools like Liner Scholar for literature reviews and Liner Write for drafting documents.

Liner at a glance

Best for: Student, Researcher, Writer
Runs on: Web, App, Browser extension, API/MCP
Pricing: Free $0; Pro $14.99/month (billed annually); Max $29.99/month (billed annually); Team $26.99/user/month; Enterprise custom pricing available.
Released: February 2015
Category: AI search engine
Website: liner.com

Key features

Advanced web search with cited answers
Academic paper discovery and comparison
Literature reviews generation
Document and PDF uploads for analysis
Mind maps for complex topics
AI-assisted writing and drafting
Access to major AI models

Use it for

Fact-checking client reports and content
Conducting academic research and literature reviews
Drafting business proposals and newsletters
Analyzing research papers and PDFs

Companions

Tools that articles about Liner recommend using with it, each with its job.

Gemini Notebook — NotebookLM for evidence across a curated source set.
Zotero — Zotero holds the checked bibliography.
Consensus — Consensus for fast evidence reads.
Perplexity — Real-time, cited answers on recent work.
Claude — Drafts and synthesis from your sources.

Alternatives to Liner

Scite — It uses direct publisher agreements to verify scientific claims with exact source links.
Paperpal — Provides comprehensive research and writing assistance trained on scholarly work.
Paper2Agent — It enables direct interaction with research papers and automatic result reproduction.
Elicit — It searches 138 million papers and automates systematic literature reviews.
ResearchRabbit — Access over 310 million academic papers and map research fields visually.
Yila AI — It connects directly to trusted scholarly databases for verified literature searches.
Paperchecker — Runs locally to prevent data theft and protect privacy.
Scira — Provides minimalistic AI search with citations.
Humata — It provides cited answers directly from your uploaded documents.
Jenni — Links every AI suggestion directly to the original PDF source for verification.
Paper Digest — Generates literature reviews with citations and no LLM dependency.
Semantic Scholar — Search over 238 million papers across all fields of science.

All Liner alternatives