Liner
Liner is an AI search and research assistant that answers questions with line-by-line citations, has a Scholar Mode limited to academic sources, and includes a writing tool; a beginner might try it to find sources for an essay.
- Free plan
- Verified free plan
- Paid from
- Pro $17.99 / month
- Known for
- Hypothesis Generator, Survey Simulator, Citation Recommender
- Facts last checked
- 2026-10-10
What makes Liner different
Cited AI search plus academic research agents and a writing editor.
01
Hypothesis Generator
Turns a rough idea into three literature-based hypotheses, flagging ones that meet four criteria.
Use it for: Finding a thesis research direction.
How to start
- Enter your question, idea or draft hypothesis
- Review the 3 hypotheses and their "Promising" badges
- Refine and add your own input
On Pro, Max, Team, Enterpriseliner.comchecked 2026-10-1102
Survey Simulator
Runs your draft survey on AI respondents matching a chosen persona to show likely patterns and risks.
Use it for: Pre-testing a questionnaire before a real pilot study.
How to start
- Upload a draft of your survey
- Specify target respondents by demographics, location, occupation and education
- Review the simulated responses
On Pro, Max, Team, Enterpriseliner.comchecked 2026-10-1103
Citation Recommender
Suggests peer-reviewed references for each sentence of your draft and builds the bibliography.
Use it for: Adding sources to a finished draft that lacks citations.
How to start
- Enter your draft without citations
- Choose from reference options for each sentence
- Pick a citation style and copy the bibliography
On Pro, Max, Team, Enterpriseliner.comchecked 2026-10-1104
Research Tracer
Maps the papers that cite a chosen core paper, with related subtopics and terms.
Use it for: Seeing how one key study shaped its field.
How to start
- Choose a core paper to explore
- See the network of papers citing it
- Explore linked papers and themes
On Pro, Max, Team, Enterpriseliner.comchecked 2026-10-1105
Liner Write
Editor that drafts a document from a topic, then lets you highlight text to edit or cite.
Use it for: Drafting a report or newsletter with real citations.
How to start
- Enter a topic or choose an example in the right panel
- Open the draft in the editor and check it
- Highlight a passage to cite sources
On Pro, Max, Team, Enterpriseliner.comchecked 2026-10-11
Limits
How much you can really use it, in the official pages' own words. Limits change often; check the date on each answer.
- Usage limitsHow much each plan lets you use it, in the official pages' own words.
- Not yet confirmed
- Context windowHow much text it can take in at once (a long document, a long chat).
- Not yet confirmed
Cost
- Free planA free plan that is not time-limited. Trials are listed separately.
- Supportedliner.comchecked 2026-10-10
Free plan
Plans
Free
Free plan
- $0.00 / month
Pro
Paid, individual
- $17.99 / month
- $14.99 / month, billed annually
Max
Paid, individual
- $35.99 / month
- $29.99 / month, billed annually
Team
Team
Amount not confirmed. See official pricingMinimum seats: 2
As shown on the official pricing page; may differ by region.
All features8 questions, each with its source and the date we checked it
AI models
- AI modelsThe AI models the official pages name for this product. Line-ups change often, so check the date.
- ChatGPT, Gemini, Claudeliner.comchecked 2026-10-10
Input and output
- File uploadYou can give it files such as PDFs or documents.
- Supportedliner.comchecked 2026-10-10
Plans: Free, Pro, Max, Team
Checking facts
- Traceable citationsAnswers link to the specific sources they rely on.
- Supportedliner.comchecked 2026-10-10
Plans: Free, Pro, Max, Team
- Search scopeWhat it searches: the open web, academic papers, or both.
- Web sources including academic papers and websites; Scholar Mode limits answers to academic journals and peer-reviewed articlessupport.liner.comchecked 2026-10-10
Workflow
- Export formatsFile formats you can download results in.
- PDF, DOCXliner.comchecked 2026-10-10
- PlatformsWhere the product is offered: web, desktop app, mobile app, or editor extension.
- Web, Mobile app, Desktop appsupport.liner.com +1checked 2026-10-10
Requirements
- AccountWhether you need to sign up before using it.
- Not yet confirmed
- Where it is availableCountries or regions where the provider says it can be used.
- Not yet confirmed