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Reviewed · Updated 2026-06-16

LinerAI

Generates AI-powered writing, summarization, and content suggestions for professionals.

Reviewed by the Conversion Gems editorial team ·
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Pricing
Freemium
Best for
Marketers
Category
Education & Productivity
The bottom line

Strong research assistant for students and analysts; Pro unlocks daily research volume.

7.5
Our score
7.5 / 10
Conversion Gems editorial verdict
Free; Pro from ~$15/mo
Features8/10
8 - citations, Scholar, Deep Research, PDF Q&A.
Value7/10
7 - fair Pro vs Perplexity; free is limited.
Ease of use9/10
9 - browser extension + simple research UI.
Ecosystem6/10
6 - Scholar/Write bundle on paid tiers.
Support6/10
6 - standard SaaS support.
What it really is

Liner (listed as LinerAI) - a research AI with cited search, web highlighting, Deep Research and Liner Scholar/Write suite.

Our take

Academic-focused answer engine with line-by-line citations, PDF upload and browser highlighter. Free with limits (3 Deep Research/mo). Pro ~$15-18/mo; Max ~$30/mo for heavy research. Team ~$27/seat/mo. Not a generic marketing writing tool despite DB tags.

Best for
Students writing papers with verifiable citations
Researchers summarizing PDFs and web sources
Teams sharing highlight libraries and research workspace
Not good for
Marketing copy generation primary use
Offline-only research workflows
Users needing unlimited free Deep Research
Friction report
Time to value
Instant via browser extension or web app.
Scale breakpoint
Free tier runs out of Deep Research quickly; pricing has changed often.
Walled garden
Medium: highlights and history tied to Liner account.

A look inside

LinerAI product screenshot

Frequently Asked Questions

Alternatives

Step up

Perplexity Pro/Max for broader model ecosystem.

Lighter alternative

Elicit or Consensus for paper-focused free search.

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Tags

#AI#Summarization

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