Liner

Liner is an AI search engine that delivers cited answers from web and academic sources.

AI Search. Ask questions, get answers with inline citations to source material.

Highlighter. The original product feature — highlight web pages and save quotes with source attribution.

Academic Focus. Weighted toward academic and reliable sources when relevant.

Browser Extension. Chrome, Firefox, and Edge extensions integrate with reading workflow.

Mobile Apps. iOS and Android for queries on the go.

Saved Sources. Organize highlights and sources into collections.

Multiple Models. Access to GPT, Claude, and other models depending on tier.

Team Features. Shared collections and highlights for research teams.

The product positions itself as a research-focused alternative to generic AI search tools, emphasizing citation quality and academic source weighting.

Liner's distinctive features set it apart from Perplexity and competitors.

Highlighter Legacy. The original product still works — highlight any web page, save quotes, return to them later. No other AI search tool offers this integration.

Academic Source Weighting. When relevant, Liner prefers peer-reviewed sources over blogs or forums.

Citation Quality. Inline source links with reliable click-through verification.

Research Workflow. Extension + highlights + search creates integrated research workflow.

Collections. Organize research by topic, project, or source type.

Korean Strength. Strong performance for Korean-language queries where competitors are weaker.

For researchers and students, Liner's feature set creates a cohesive workflow that generic AI search tools don't match. For casual users, these features matter less and Perplexity's overall polish wins.

Liner pricing is accessible with reasonable tier options.

Free. Limited queries per day, basic model access, highlighter features included. Adequate for casual use.

Pro ($15/month). Unlimited queries, premium model access, full highlighter features, team collaboration on shared collections.

Team (Contact sales). Team collaboration, shared highlights, admin controls, volume pricing.

Value comparison: Perplexity Pro at $20/month is slightly more expensive with deeper model lineup and broader capabilities. You.com Pro at $15 matches Liner on price. Free ChatGPT includes search for most users. Liner's value depends on whether the highlighter workflow and academic focus justify the subscription vs alternatives.

Against Perplexity: Perplexity has deeper model access, more polished UX, broader capabilities, and stronger brand. Liner has highlighter and academic focus. Most users choose Perplexity; researchers may prefer Liner.

Against You.com: Similar positioning, similar pricing. You.com has more features overall; Liner has highlighter distinction. Either works for similar use cases.

Against ChatGPT Search: Free ChatGPT search covers most general web query needs. Liner's advantage is highlighter and academic focus. For research workflows, Liner may justify cost.

Against [Google AI](/gemini) Overviews: Free and integrated. Good for casual queries. Liner is for deeper research work where citation quality matters.

Against Claude: Claude.ai with web search in Pro tier provides excellent research synthesis. Liner's differentiation is highlighter workflow.

Against Elicit: Elicit specializes in academic research with paper-specific features. Elicit is stronger for literature reviews; Liner is broader for general research.

Academic research workflows where citations from peer-reviewed sources matter.

Highlighter-integrated research where saving quotes is core workflow.

Korean-language queries where Liner's native-language strength shows.

Students doing literature reviews benefiting from source weighting.

Research teams using shared collections.

Users preferring simpler UX than Perplexity's expanding feature set.

General AI search where Perplexity's polish wins.

Widest model selection where Perplexity and You.com offer more options.

Cheapest option where free ChatGPT search is adequate.

Brand recognition in professional contexts where Perplexity is better known.

Heavy technical work where ChatGPT or Claude are better suited.

Real-time news where top-tier tools handle freshness better.

Academic researchers who value citation quality and source weighting.

Students doing literature reviews or source gathering.

Korean-language users where Liner's strength shines.

Highlighter workflow enthusiasts who use the tool in research reading.

Research teams using shared collections.

Users dissatisfied with Perplexity looking for alternative.

Most general users should use Perplexity, ChatGPT Search, or Google.

Cheapest-option seekers should use free ChatGPT search.

Widest-feature users should use Perplexity Pro.

Heavy code users should use ChatGPT or Claude.

Casual research users don't need Liner's depth.

Liner is a competent AI search tool with a distinctive niche in academic research and highlighter workflows. For users whose work fits that niche, Liner is a reasonable choice alongside or instead of Perplexity. For most general users, Perplexity is the stronger default in 2026.

The 2026 AI search market has consolidated toward a few dominant players. Perplexity leads on polish and brand. ChatGPT covers search free for subscribers. Google AI Overviews handles casual queries. Liner occupies a defensible niche but must justify its existence against these well-funded alternatives.

For practical use in 2026: try the free tier to evaluate fit. Subscribe to Pro ($15/month) if the highlighter workflow and academic focus match your research style. Stick with Perplexity if you want the broader tool. Use free ChatGPT or Google AI Overviews for casual queries. Liner is a reasonable choice for specific users, but not the default for most.

The bigger question is whether Liner can maintain its niche as AI search consolidates. The highlighter advantage is real but replicable. Academic source weighting could be added by competitors. Liner's differentiation requires continued investment to stay meaningful. Current users should evaluate periodically, but for now, Liner remains a legitimate Perplexity alternative for research-focused workflows.

<!-- p2-p1: liner vs google --> ### Liner vs Google: how the AI search tools differ in 2026

Liner and Google's AI Overviews both surface AI-generated answers above traditional search results, but they're built for different jobs. Liner is purpose-built as a research and citation tool — every claim in a Liner answer carries an inline source link, and the product makes it easy to save passages, highlight, and pull citations into a research project. Google AI Overviews are a search-augmentation feature that summarizes the top results into one block; they're optimized for fast answers, not citation-able research.

Practical differences in 2026: Liner consistently links to higher-quality academic sources (Google Scholar-tier results plus reputable industry publications), while Google Overviews tend toward Wikipedia and the top SEO results. Liner's "Save" feature builds a personal research library that persists across queries; Google has no equivalent. Conversely, Google's index is broader — for very recent news or hyperlocal queries, Liner often comes up empty where Google has substantive coverage.

The right pick depends on the job. For research papers, due-diligence projects, and any work where citations matter, Liner is the stronger choice. For everyday "answer this fast" questions, Google AI Overviews are better — they're free, integrated into search, and built for speed. Most users who want both find that Liner sits beside Google rather than replacing it.