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Liner

AI-powered search, research, writing, and productivity assistant.

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Overview

What is Liner?

Liner is built around search and research workflows. Its pricing page shows a free tier with Simple Search, Advanced Search queries, Research Report generation, and file-based questions, plus paid plans that expand access to Advanced Search, Deep Research, file uploads, and research history. The product also emphasizes line-by-line citation, a research assistant, Scholar Mode, and an ad-free experience on higher tiers. The overall positioning centers on finding answers, reviewing sources, and organizing research across web and file content. Liner is an AI research and productivity platform that provides source-backed web search, academic research, document analysis, AI chat, deep research, and writing tools. Its product suite includes Liner, Liner Scholar, and Liner Write, designed for general research, academic work, and professional writing.
Capabilities

Liner features

Simple Search
Advanced Search
Research Report generation
Ask questions with a file upload
Unlimited research history
Scholar Mode
Line-by-line citation
Deep Research
Research Assistant
File uploads
Deep dive

More about Liner

Pricing Info

Liner currently offers three main plans:

  • Free: $0 — unlimited Advanced Search, access to Image Generation and Deep Research, and 1 file upload/day up to 25 MB.
  • Pro: $17.99/month or $14.99/month billed annually — 20 file uploads/day up to 100 MB, major AI models, ad-free search, and additional research capabilities.
  • Max: $35.99/month or $29.99/month billed annually — unlimited daily file uploads up to 200 MB, major AI models, and advanced research capabilities.

The Pro and Max plans apply across Liner, Liner Scholar, and Liner Write.

How to Get Started

  1. Visit Liner
  2. Create a free account.
  3. Enter a question in AI Search or start a research task.
  4. Review the cited sources and AI-generated answer.
  5. Upload PDFs or documents when deeper analysis is needed.
  6. Use Liner Scholar for academic research or Liner Write for professional writing.
  7. Upgrade if you need higher upload limits, additional AI models, or advanced research features.
The verdict

Pros & cons

Pros

Combines search, research, writing, and document analysis.

Provides source-backed answers and citations.

Strong academic research features.

Supports multiple major AI models.

Free plan available.

Includes dedicated Scholar and Write workflows.

Cons

Advanced features and higher usage limits require a paid plan.

AI-generated answers still need verification.

The large number of research and writing features can take time to learn.

File-upload and usage limits vary by plan.

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