Liner Review: AI Search and Research Assistant with Citation Standards

Verdict (TL;DR): Liner takes a different approach to AI search: it prioritises cited, verifiable answers over speed and confidence. The browser extension highlighting tool is genuinely useful for researchers. The Pro plan at USD $14.99/month (approximately AUD $28 inc. GST) is reasonably priced. The limitations are real: it is built for research, not general chat; the company is based in Seoul with limited data transparency for Australian users; and like all AI tools, it can still get things wrong.

Score: 14/25 — ⭐⭐⭐ Good

Last reviewed: 26 June 2026 by Adam.

What Liner is

Liner is an AI-powered search and research assistant developed by Liner Inc., a company founded in 2012 and headquartered in Seoul, South Korea. The product has evolved considerably from its origins as a web highlighting tool. Today it combines an AI search engine that surfaces cited answers, a research agent system for deeper investigation, and a browser extension for annotating web pages and documents.

The core positioning is "credible AI search" — answers backed by sources you can inspect and verify, rather than confident-sounding responses with no traceable origin. Liner claims its Advanced Search feature outperforms competitors on OpenAI's SimpleQA benchmark, which tests factual accuracy.

The product has three connected surfaces: - Liner — the main AI search and research interface at liner.com - Liner Scholar — a specialised mode for academic research, with features like hypothesis generation, literature review automation, and citation recommendation - Liner Write — a writing assistant integrated with the research workflow

The browser extension allows users to highlight and annotate content on any web page, save those highlights to a personal library, and bring them into AI-assisted research workflows. This is a meaningful differentiator for students, analysts, and professionals who do a lot of web-based research.

Liner is available on web, iOS, Android, Mac, Windows, Chrome, and Edge.

What it costs in Australia

Liner prices in USD. There is no AUD billing option.

Prices sourced directly from liner.com/pricing as of 26 June 2026. Exchange rate: 1 USD ≈ 1.40 AUD. GST will likely apply for Australian customers — confirm with Liner's billing team whether they issue Australian tax invoices. — Wayback 18 August 2026

The free plan is functional: unlimited Advanced Search, access to image generation and deep research, and one file upload per day (up to 25MB). The main limitations are ads in search results and a cap of 100 agent credits per month.

The Pro plan at USD $14.99/month (billed annually) adds 1,000 agent credits, 20 file uploads per day (up to 100MB), access to major AI models including GPT-4o and Claude, and an ad-free experience. For a researcher or professional using Liner regularly, this is the plan worth considering.

The Max plan at USD $29.99/month adds unlimited file uploads (up to 200MB) and 2,500 agent credits. The Team plan at USD $26.99/seat/month adds admin controls, a dedicated workspace, and excludes team data from AI training — an important detail for organisations handling sensitive research.

How it works in practice

A typical Liner session for a small business owner researching, say, changes to the Australian Superannuation Guarantee for 2026:

1. Open liner.com or the browser extension.
2. Type your query — "Australian superannuation guarantee rate 2026 changes."
3. Liner runs its Advanced Search, returns an answer structured with line-by-line citations. Each factual claim is linked to a source you can open and verify.
4. Use the highlighting tool to annotate key points from the source documents.
5. If you want deeper analysis, activate Deep Research — Liner runs a more extensive sweep and returns a structured report.
6. Export highlights and summaries to your own workspace or continue into Liner Write for a draft document.

The citation-first approach is what distinguishes Liner from a generic AI chatbot. Rather than getting one synthesised answer and hoping it is accurate, you get structured claims with sources attached. For research tasks where accuracy matters — business decisions, academic work, professional analysis — this is a meaningful improvement over uncited AI answers.

The Scholar mode goes further: it connects to academic databases and can help generate research questions, find relevant literature, evaluate hypotheses, and suggest citations for academic writing. This is squarely aimed at university students and researchers.

What it does well

The citation standard is the differentiator. Line-by-line citations for AI-generated answers reduce the hallucination risk meaningfully. You can see exactly which claim came from which source and verify it yourself. This is the right approach for a research tool and Liner deserves credit for prioritising it.

The browser extension highlighting tool is genuinely useful. Being able to highlight and save sections of any web page — articles, reports, government sites — and have those highlights feed into AI analysis is a practical workflow improvement. For anyone doing ongoing research across multiple sources, this eliminates a lot of manual copy-paste.

Liner Scholar's academic features are well-designed. Hypothesis generation, literature review automation, and citation recommendation are genuinely useful for researchers. The Survey Simulator and Peer Review features are distinctive. If your audience includes Australian university students and academics, Liner Scholar is worth highlighting.

The free tier is genuinely functional. Unlimited Advanced Search and daily Deep Research access at no cost means Liner is usable without payment. The free plan is not a crippled demo — it delivers real value for occasional users.

Cross-platform availability is strong. Web, desktop apps, and browser extensions on Chrome and Edge mean Liner fits into most Australian professionals' existing workflows without friction.

What it doesn't do well

AI still gets things wrong. This needs saying clearly even for a tool that prioritises citations. Liner's AI can misread sources, summarise them inaccurately, or select sources that are not authoritative. The cited-answer format reduces the risk but does not eliminate it. For legal, financial, or medical research, you need professional advice — Liner is a starting point, not the end point.

The agent credit system is confusing. Different research tasks consume different amounts of credits — Deep Research costs 40 credits, Literature Review costs 40, Survey Simulator costs 80. On the free plan, 100 credits disappears quickly. On Pro, 1,000 credits sounds substantial until you run a few complex research sessions. Understanding what you are spending before you run out requires careful reading of the credit deduction guide.

Data handling transparency is limited for Australian users. Liner is a South Korean company. While the privacy policy indicates that it maintains different versions for different regions, the specifics of where Australian user data is stored, processed, and retained are not prominently disclosed on the Australian-facing experience (confirm directly with Liner before using in a professional or organisational context involving personal data). The Team plan notes that team data is "excluded from AI training," which implies standard individual accounts' data may be used for training purposes — this should be confirmed.

USD-only pricing with no AUD option. At the Pro tier, the cost is manageable (approximately AUD $21/month), but monthly exchange rate fluctuations mean the effective AUD cost varies. No Australian tax invoice confirmed.

No Australian support presence. Liner is a Korean company with no Australian team. Support operates through a help centre and community; there is no APAC-timezone human support for standard accounts.

The interface has layers to learn. Between Liner, Liner Scholar, and Liner Write — each with different modes, credit costs, and features — the full product takes time to understand. Casual users may find they are only using a fraction of what is available.

Australian fit

Liner is accessible from Australia with no geographic restrictions. The free tier is immediately usable without any billing setup.

For Australian researchers, the most practically useful features are the Advanced Search with citations (covering general knowledge), the browser extension for annotating ASIC reports, ATO guidance, and news articles, and the Deep Research mode for structured topic summaries.

Liner Scholar's academic research features are relevant to Australian university students. The hypothesis and literature review tools could save significant time in the early stages of a research project.

The main Australian-fit concerns are data handling transparency (Korean company, unclear Australian data residency), USD-only pricing, and the absence of specifically Australian-sourced academic databases in the Scholar mode (confirm with Liner which databases Scholar searches).

There is no en-AU spell-check or Australian English preference setting. Query results are global by default; include "Australia" in your queries for locally relevant results.

Australian Fit score: 2/5 — accessible and functional from Australia, reasonable pricing at Pro tier, but Korean data jurisdiction, limited AU transparency, USD billing, and no APAC support.

Alternatives

• Perplexity — the clearest head-to-head competitor for AI-powered cited search. US-based company, generally stronger at real-time news coverage, and with a more established premium tier. Both tools prioritise cited answers; Perplexity has a larger user base and more Australian-language coverage in reviews.
• Globe Explorer — see our separate review. Free visual knowledge discovery, but no citation standard and no file upload. Better for orientation than for research.
• Exa — a more technically-oriented search API and research tool with high source quality. Better suited to developers and power users than to general research tasks.

Bottom line

Liner takes the right philosophical approach to AI search: show your sources, let users verify, and don't pretend the AI is infallible. That commitment to cited answers puts it ahead of uncited AI chatbots for research tasks where accuracy matters.

The Pro plan at USD $14.99/month is one of the more reasonably priced research AI tools in this category. The browser extension is a practical differentiator. Liner Scholar is worth exploring for Australian students and academics.

The limitations are honest and worth stating again: the AI still makes mistakes even when citing sources, data handling transparency needs improvement for Australian professional use, and the credit system requires attention. Use Liner as a rigorous starting point, not as a substitute for expert advice.

Score

Frequently asked questions

How much does Liner cost in Australian dollars?

Liner's Pro plan costs USD $14.99 per month when billed annually, which is approximately AUD $21–21 per month depending on the exchange rate (using 1 USD ≈ 1.40 AUD, plus GST). The free tier is fully functional for basic research tasks at no cost. Liner prices in USD only — there is no AUD billing option.

Is Liner reliable for research?

Liner's citation-first approach makes it more reliable than uncited AI chatbots for research. Every AI-generated claim is linked to a source you can verify. However, AI can still misread or misrepresent sources — Liner is best used as a starting point for research, with important claims verified against primary sources. It does not replace professional advice for legal, financial, or medical questions.

Where is Liner based and where is data stored?

Liner is developed by Liner Inc., headquartered in Seoul, South Korea. The specific location of data storage for Australian users is not prominently disclosed on the Australian-facing experience. Users concerned about data residency should contact Liner directly before using the tool for professional or organisational purposes involving personal data.

Sources

• Liner pricing page: liner.com/pricing — accessed 26 June 2026 — Wayback 18 August 2026
• Liner main site: liner.com — accessed 26 June 2026 — Wayback 3 July 2026
• Liner privacy policy: liner.com/privacy — accessed 26 June 2026 — Wayback 20 August 2026
• Liner about page: liner.com/about — accessed 26 June 2026 — Wayback 28 May 2026
• CBInsights company profile: cbinsights.com/company/liner — secondary source, for company background only — Wayback 3 September 2026

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