Liner vs Paperguide

Liner

• People who want every line of an AI answer tied to a source
• Students drafting a literature review or looking for citations
• Users who want search, research and writing on one subscription
• Small teams: the Team plan covers 2 to 20 members

Paperguide

• Teams running systematic reviews that need documented screening decisions
• Researchers who want search, references and writing in one workspace
• Students and academics, who get 30% off with a university email
• Pulling the same data points out of many papers into one table

Liner

• The free plan shows ads in answers and allows 1 file upload a day; the plan table lists 0 agent credits for it, though the FAQ mentions limited credits.
• Agents and external models spend credits: Pro includes 1,000 and Max 2,500, and one Literature Review request uses 40.
• The site's FAQ says Liner Scholar and Liner Write are supported only on desktop.
• Liner does not offer refunds; a subscription can be canceled before it renews.

Paperguide

• The Free plan has no systematic reviews or shared workspaces and is limited to 20 AI searches and 2,000 AI credits a month.
• AI features draw on a monthly credit pool: 12,500 on Plus, 50,000 on Pro and 150,000 on Evidence.
• Dual-reviewer screening for systematic reviews needs the Evidence plan, at $89 per seat / month billed annually.
• Image and table extraction is marked as coming soon on the pricing page.

Liner

Cited answers

Answers carry a citation on each line that opens the source. Follow-up questions continue the thread, and an answer can be turned into a mind map.

Deep Research

Gathers information on a topic and returns it as an organized report while showing its line of reasoning. Each request uses 40 agent credits.

Liner Scholar agents

Agents for academic work include Literature Review, Citation Recommender, Research Tracer, Hypothesis Generator and Peer Review. Each request costs between 30 and 80 credits.

File uploads

Upload papers and PDFs to get summaries and ask questions about them: 1 file a day on Free, 20 a day on Pro and unlimited on Max.

Liner Write

A writing workspace that drafts from a topic, shapes ideas into emails, newsletters and reports, and lets you search and edit in the same window.

Search API and MCP

Developers can call Liner's search and answer agents through an API, and MCP servers expose its web search and scholar search to other AI agents.

Paperguide

AI Search

Ask a research question in plain language and get a synthesized answer drawn from more than 200 million papers, with each claim linked to its source.

Systematic reviews

Screens papers against a predefined protocol with cited evidence for each criterion, then produces verified extraction tables, a report and a PRISMA diagram. Dual-reviewer screening is on the Evidence plan.

Reference manager

Imports from Zotero or Mendeley, or by DOI, URL, PDF, BibTeX or RIS, fetches metadata and open-access PDFs, and formats citations in more than 1,000 styles.

Extract Data

You define the columns and the AI fills them across the selected papers, with every value linked to the statement it came from. Tables export to CSV or Excel.

Research Agent

Investigates a topic across the paper database and your library, answers questions about one or several PDFs, and can generate a literature review of up to 50 papers.

AI Writer

Drafts and edits documents with citations from your library and the paper database, and exports them as Word, PDF or LaTeX files.

Liner

• Free$0

  Unlimited Advanced Search with ads in the answers, 1 file upload a day of up to 25 MB and 10 Research Assistant uses a day.

• Pro$14.99

  per month, billed annually; $17.99 billed monthly

  1,000 agent credits, 20 file uploads a day of up to 100 MB, ChatGPT, Gemini and Claude models, and no ads. Covers Liner, Liner Scholar and Liner Write.

• Max$29.99

  per month, billed annually; $35.99 billed monthly

  Everything in Pro with 2,500 agent credits and unlimited file uploads of up to 200 MB each.

• Team$26.99

  per seat / month

  For 2 to 20 members: everything in Max plus central billing, a workspace with admin controls and team data excluded from AI training.

• EnterpriseCustom

  Everything in Team plus a dedicated manager, onboarding sessions, audit logs and higher discount rates.

Paperguide

• Free$0

  2,000 AI credits and 20 AI searches a month, 500 MB of reference storage, and extraction tables of up to 10 papers and 5 columns.

• Plus$12

  per seat / month, billed annually ($144); $19 billed monthly

  12,500 AI credits a month, systematic reviews of up to 1,000 papers, unlimited AI searches and reference storage, and shared workspaces.

• Pro$29

  per seat / month, billed annually ($348); $49 billed monthly

  50,000 AI credits a month, systematic reviews of up to 5,000 papers and 500 Search API requests a month.

• Evidence$89

  per seat / month, billed annually ($1,068); $149 billed monthly

  150,000 AI credits a month, PRISMA-grade dual-reviewer screening, a dedicated support channel and 1,500 Search API requests a month.

• EnterpriseCustom

  Custom AI credits, systematic reviews of up to 20,000 papers, dual-reviewer screening and a dedicated support channel.

Liner

• Annual discount

  Lower monthly rate with annual billing

  The pricing page labels annual billing as saving 20%. Pro is $14.99 a month billed annually against $17.99 monthly, and Max is $29.99 against $35.99, about 17% less.

Paperguide

• Annual discount

  Save up to 41% with yearly billing

  Billed yearly, Plus is $12 a seat per month against $19 billed monthly, Pro is $29 against $49 and Evidence is $89 against $149. The pricing page labels the saving as 41%.

• Education

  30% academic discount with a university email

  Verifying a university email takes 30% off: Plus becomes $8, Pro $20 and Evidence $62 per seat / month billed yearly, or $13, $34 and $104 billed monthly.