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LINER
AI-powered research platform that combines advanced web search, deep research reports, academic paper discovery, PDF analysis, and AI research agents

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<ul><li><strong>Pricing Model:</strong> Freemium subscription with self-serve tiers and &quot;Team&quot; pricing</li><li><strong>Packaging Model:</strong> Freemium, Good / Better / Best with &quot;Team&quot; tier</li><li><strong>Credit Model:</strong> Recurring monthly &quot;Agent credits&quot; by tier</li></ul>
March 2, 2026
Last update:
<h3>Product Overview</h3><p>LINER is an AI-powered research assistant that provides line-by-line source attribution and citation-backed answers. Founded in 2015 in Seoul, South Korea, the company has raised $43.7 million across 10 funding rounds and serves 12 million users globally across 220 countries. LINER integrates multiple AI models (GPT-5, Gemini, and Claude) within a single platform subscription and positions itself as the 4th most-used generative AI product globally according to a16z analysis.<br /> <br /> The platform focuses on academic and professional research with features like Scholar Mode for rigorous source verification, automated citation formatting in APA/MLA/Chicago formats, and document analysis capabilities. LINER achieved a 95.3% accuracy score on OpenAI&#039;s SimpleQA benchmark, outperforming competitors like Perplexity Pro (94.3%) and GPT-4.5 Preview (89.6%).</p>
<h3>Pricing Snapshot</h3><div class="tableResponsive"><table cellpadding="6" cellspacing="0"><tr><th>Tier</th><th>Price</th><th>Key Features</th><th>Rate Limits</th></tr><tr><td>Free</td><td>$0</td><td>3 Advanced Searches per day; 3 Deep Research per month; 1 file upload per day (25MB); 100 Agent Credits</td><td>3 Advanced Searches per day; 3 Deep Research per month; 1 file upload per day (25MB)</td></tr><tr><td>Pro</td><td>$14.99/month (annual) / $17.99/month (monthly)</td><td>Unlimited Advanced Searches; 25 Deep Research per month; 20 file uploads per day (100MB); 1,000 Agent Credits</td><td>Unlimited Advanced Searches; 25 Deep Research per month; 20 file uploads per day (100MB)</td></tr><tr><td>Max</td><td>$29.99/month (annual only)</td><td>Unlimited Advanced Searches; 200 Deep Research per month; Unlimited file uploads (200MB); 2,500 Agent Credits</td><td>Unlimited Advanced Searches; 200 Deep Research per month; Unlimited file uploads (200MB)</td></tr><tr><td>Team</td><td>$26.99/seat (monthly)</td><td>Unlimited Advanced Searches; 200 Deep Research per month; Unlimited file uploads (200MB); 2,500 Agent Credits per seat</td><td>Unlimited Advanced Searches; 200 Deep Research per month per seat; Unlimited file uploads (200MB)</td></tr></table></div>
<h3>Key Features & Capabilities</h3><p>LINER combines multi-model AI access with specialized research tools designed for academic and professional workflows, including automated citation management, document processing, and content integration capabilities.</p><ul><li>AI Research Tools: Multi-model access (GPT-5, Gemini, Claude) with line-by-line source attribution, Scholar Mode for rigorous verification, and one-click citation export in APA, MLA, and Chicago formats.</li><li>Document Processing: PDF and text analysis with tier-based size limits ranging from 25MB on Free tier to 200MB on Max/Team tiers, plus file upload support for multiple formats with daily limits varying by subscription level.</li><li>Deep Research &amp; Advanced Queries: In-depth analysis queries with 1-2 minute response times, delivering comprehensive research outputs with usage limits from 3 per month on Free tier to 200 per month on paid tiers.</li><li>Content Integration: YouTube summarization with timestamp navigation, multi-language capabilities across the platform, and advanced search functionality with daily limits on Free tier and unlimited access on paid subscriptions.</li></ul>
<h3>Pricing Model Analysis</h3><p>LINER employs a freemium seat-based pricing model with usage-based consumption limits as differentiators.</p><div class="tableResponsive"><table cellpadding="6" cellspacing="0"><tr><th>Metric Type</th><th>What Measured</th><th>Why It Matters</th></tr><tr><td>Value Metric</td><td>Research accuracy and source attribution</td><td>Aligns with academic/professional research needs</td></tr><tr><td>Usage Metric</td><td>Advanced searches, deep research queries, file uploads</td><td>Controls consumption of premium AI capabilities</td></tr><tr><td>Billable Metric</td><td>Monthly/annual subscriptions with seat-based team pricing</td><td>Predictable revenue with scaling for organizations</td></tr></table></div>
<h3>Pricing Evolution Timeline</h3><div class="tableResponsive"><table cellpadding="6" cellspacing="0"><tr><th>Date</th><th>Milestone</th><th>Source</th></tr><tr><td>November 2022</td><td>Completely free model with no paid tiers</td><td><a href='https://www.futurepedia.io/tool/linerai' target='_blank'>Futurepedia listing <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16" fill="none"> <path d="M14 6.5C14 6.63261 13.9473 6.75979 13.8536 6.85355C13.7598 6.94732 13.6326 7 13.5 7C13.3674 7 13.2402 6.94732 13.1464 6.85355C13.0527 6.75979 13 6.63261 13 6.5V3.7075L8.85437 7.85375C8.76055 7.94757 8.63331 8.00028 8.50062 8.00028C8.36794 8.00028 8.2407 7.94757 8.14688 7.85375C8.05305 7.75993 8.00035 7.63268 8.00035 7.5C8.00035 7.36732 8.05305 7.24007 8.14688 7.14625L12.2925 3H9.5C9.36739 3 9.24021 2.94732 9.14645 2.85355C9.05268 2.75979 9 2.63261 9 2.5C9 2.36739 9.05268 2.24021 9.14645 2.14645C9.24021 2.05268 9.36739 2 9.5 2H13.5C13.6326 2 13.7598 2.05268 13.8536 2.14645C13.9473 2.24021 14 2.36739 14 2.5V6.5ZM11.5 8C11.3674 8 11.2402 8.05268 11.1464 8.14645C11.0527 8.24021 11 8.36739 11 8.5V13H3V5H7.5C7.63261 5 7.75979 4.94732 7.85355 4.85355C7.94732 4.75979 8 4.63261 8 4.5C8 4.36739 7.94732 4.24021 7.85355 4.14645C7.75979 4.05268 7.63261 4 7.5 4H3C2.73478 4 2.48043 4.10536 2.29289 4.29289C2.10536 4.48043 2 4.73478 2 5V13C2 13.2652 2.10536 13.5196 2.29289 13.7071C2.48043 13.8946 2.73478 14 3 14H11C11.2652 14 11.5196 13.8946 11.7071 13.7071C11.8946 13.5196 12 13.2652 12 13V8.5C12 8.36739 11.9473 8.24021 11.8536 8.14645C11.7598 8.05268 11.6326 8 11.5 8Z" fill="#95988B"/> </svg></a></td></tr><tr><td>January 2023</td><td>Paid subscription tiers introduced alongside ChatGPT Assistant launch</td><td><a href='https://www.producthunt.com/products/liner' target='_blank'>Product Hunt page <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16" fill="none"> <path d="M14 6.5C14 6.63261 13.9473 6.75979 13.8536 6.85355C13.7598 6.94732 13.6326 7 13.5 7C13.3674 7 13.2402 6.94732 13.1464 6.85355C13.0527 6.75979 13 6.63261 13 6.5V3.7075L8.85437 7.85375C8.76055 7.94757 8.63331 8.00028 8.50062 8.00028C8.36794 8.00028 8.2407 7.94757 8.14688 7.85375C8.05305 7.75993 8.00035 7.63268 8.00035 7.5C8.00035 7.36732 8.05305 7.24007 8.14688 7.14625L12.2925 3H9.5C9.36739 3 9.24021 2.94732 9.14645 2.85355C9.05268 2.75979 9 2.63261 9 2.5C9 2.36739 9.05268 2.24021 9.14645 2.14645C9.24021 2.05268 9.36739 2 9.5 2H13.5C13.6326 2 13.7598 2.05268 13.8536 2.14645C13.9473 2.24021 14 2.36739 14 2.5V6.5ZM11.5 8C11.3674 8 11.2402 8.05268 11.1464 8.14645C11.0527 8.24021 11 8.36739 11 8.5V13H3V5H7.5C7.63261 5 7.75979 4.94732 7.85355 4.85355C7.94732 4.75979 8 4.63261 8 4.5C8 4.36739 7.94732 4.24021 7.85355 4.14645C7.75979 4.05268 7.63261 4 7.5 4H3C2.73478 4 2.48043 4.10536 2.29289 4.29289C2.10536 4.48043 2 4.73478 2 5V13C2 13.2652 2.10536 13.5196 2.29289 13.7071C2.48043 13.8946 2.73478 14 3 14H11C11.2652 14 11.5196 13.8946 11.7071 13.7071C11.8946 13.5196 12 13.2652 12 13V8.5C12 8.36739 11.9473 8.24021 11.8536 8.14645C11.7598 8.05268 11.6326 8 11.5 8Z" fill="#95988B"/> </svg></a></td></tr><tr><td>March 2025</td><td>Deep Research tool launch with 95.3% SimpleQA benchmark score</td><td><a href='https://biz.chosun.com/en/en-it/2025/03/06/MPSEO6XDYVABNMT6WBPA5BC53E' target='_blank'>Chosun Business <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16" fill="none"> <path d="M14 6.5C14 6.63261 13.9473 6.75979 13.8536 6.85355C13.7598 6.94732 13.6326 7 13.5 7C13.3674 7 13.2402 6.94732 13.1464 6.85355C13.0527 6.75979 13 6.63261 13 6.5V3.7075L8.85437 7.85375C8.76055 7.94757 8.63331 8.00028 8.50062 8.00028C8.36794 8.00028 8.2407 7.94757 8.14688 7.85375C8.05305 7.75993 8.00035 7.63268 8.00035 7.5C8.00035 7.36732 8.05305 7.24007 8.14688 7.14625L12.2925 3H9.5C9.36739 3 9.24021 2.94732 9.14645 2.85355C9.05268 2.75979 9 2.63261 9 2.5C9 2.36739 9.05268 2.24021 9.14645 2.14645C9.24021 2.05268 9.36739 2 9.5 2H13.5C13.6326 2 13.7598 2.05268 13.8536 2.14645C13.9473 2.24021 14 2.36739 14 2.5V6.5ZM11.5 8C11.3674 8 11.2402 8.05268 11.1464 8.14645C11.0527 8.24021 11 8.36739 11 8.5V13H3V5H7.5C7.63261 5 7.75979 4.94732 7.85355 4.85355C7.94732 4.75979 8 4.63261 8 4.5C8 4.36739 7.94732 4.24021 7.85355 4.14645C7.75979 4.05268 7.63261 4 7.5 4H3C2.73478 4 2.48043 4.10536 2.29289 4.29289C2.10536 4.48043 2 4.73478 2 5V13C2 13.2652 2.10536 13.5196 2.29289 13.7071C2.48043 13.8946 2.73478 14 3 14H11C11.2652 14 11.5196 13.8946 11.7071 13.7071C11.8946 13.5196 12 13.2652 12 13V8.5C12 8.36739 11.9473 8.24021 11.8536 8.14645C11.7598 8.05268 11.6326 8 11.5 8Z" fill="#95988B"/> </svg></a></td></tr><tr><td>December 2025</td><td>Paper Quick Review feature launch</td><td><a href='https://liner.com/news/liner-paper-quick-review' target='_blank'>LINER News <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16" fill="none"> <path d="M14 6.5C14 6.63261 13.9473 6.75979 13.8536 6.85355C13.7598 6.94732 13.6326 7 13.5 7C13.3674 7 13.2402 6.94732 13.1464 6.85355C13.0527 6.75979 13 6.63261 13 6.5V3.7075L8.85437 7.85375C8.76055 7.94757 8.63331 8.00028 8.50062 8.00028C8.36794 8.00028 8.2407 7.94757 8.14688 7.85375C8.05305 7.75993 8.00035 7.63268 8.00035 7.5C8.00035 7.36732 8.05305 7.24007 8.14688 7.14625L12.2925 3H9.5C9.36739 3 9.24021 2.94732 9.14645 2.85355C9.05268 2.75979 9 2.63261 9 2.5C9 2.36739 9.05268 2.24021 9.14645 2.14645C9.24021 2.05268 9.36739 2 9.5 2H13.5C13.6326 2 13.7598 2.05268 13.8536 2.14645C13.9473 2.24021 14 2.36739 14 2.5V6.5ZM11.5 8C11.3674 8 11.2402 8.05268 11.1464 8.14645C11.0527 8.24021 11 8.36739 11 8.5V13H3V5H7.5C7.63261 5 7.75979 4.94732 7.85355 4.85355C7.94732 4.75979 8 4.63261 8 4.5C8 4.36739 7.94732 4.24021 7.85355 4.14645C7.75979 4.05268 7.63261 4 7.5 4H3C2.73478 4 2.48043 4.10536 2.29289 4.29289C2.10536 4.48043 2 4.73478 2 5V13C2 13.2652 2.10536 13.5196 2.29289 13.7071C2.48043 13.8946 2.73478 14 3 14H11C11.2652 14 11.5196 13.8946 11.7071 13.7071C11.8946 13.5196 12 13.2652 12 13V8.5C12 8.36739 11.9473 8.24021 11.8536 8.14645C11.7598 8.05268 11.6326 8 11.5 8Z" fill="#95988B"/> </svg></a></td></tr><tr><td>January 2026</td><td>LINER Scholar standalone product launch</td><td><a href='https://liner.com/news/liner-launches-liner-scholar' target='_blank'>LINER News <svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" viewBox="0 0 16 16" fill="none"> <path d="M14 6.5C14 6.63261 13.9473 6.75979 13.8536 6.85355C13.7598 6.94732 13.6326 7 13.5 7C13.3674 7 13.2402 6.94732 13.1464 6.85355C13.0527 6.75979 13 6.63261 13 6.5V3.7075L8.85437 7.85375C8.76055 7.94757 8.63331 8.00028 8.50062 8.00028C8.36794 8.00028 8.2407 7.94757 8.14688 7.85375C8.05305 7.75993 8.00035 7.63268 8.00035 7.5C8.00035 7.36732 8.05305 7.24007 8.14688 7.14625L12.2925 3H9.5C9.36739 3 9.24021 2.94732 9.14645 2.85355C9.05268 2.75979 9 2.63261 9 2.5C9 2.36739 9.05268 2.24021 9.14645 2.14645C9.24021 2.05268 9.36739 2 9.5 2H13.5C13.6326 2 13.7598 2.05268 13.8536 2.14645C13.9473 2.24021 14 2.36739 14 2.5V6.5ZM11.5 8C11.3674 8 11.2402 8.05268 11.1464 8.14645C11.0527 8.24021 11 8.36739 11 8.5V13H3V5H7.5C7.63261 5 7.75979 4.94732 7.85355 4.85355C7.94732 4.75979 8 4.63261 8 4.5C8 4.36739 7.94732 4.24021 7.85355 4.14645C7.75979 4.05268 7.63261 4 7.5 4H3C2.73478 4 2.48043 4.10536 2.29289 4.29289C2.10536 4.48043 2 4.73478 2 5V13C2 13.2652 2.10536 13.5196 2.29289 13.7071C2.48043 13.8946 2.73478 14 3 14H11C11.2652 14 11.5196 13.8946 11.7071 13.7071C11.8946 13.5196 12 13.2652 12 13V8.5C12 8.36739 11.9473 8.24021 11.8536 8.14645C11.7598 8.05268 11.6326 8 11.5 8Z" fill="#95988B"/> </svg></a></td></tr></table></div>
<h3>Customer Sentiment Highlights</h3><ul><li>“The free trial is also reasonable because of the high number of questions it allows per day.”<b> <span class="pricingHiphenSymb"> - </span>Verified User, Slashdot review</b></li><li>“If I went to Google, I&#039;d usually have to look at at least two sources and spend around five minutes trying to figure it out. Liner was more of a quick, one-minute check.”<b> <span class="pricingHiphenSymb"> - </span>Brooke O., USC School of Medicine Greenville, LINER case study</b></li></ul>
Metronome’s Take
<p>LINER&#039;s pricing model is a freemium subscription built around two parallel consumption mechanics: hard monthly/daily caps on core research features (Advanced Search, Deep Research, file uploads) and a separate credit currency governing AI agent usage. This dual-meter structure reflects the product&#039;s two-layer value proposition — everyday AI-assisted search and research, and more compute-intensive agentic workflows. The Free tier is functional enough to attract users but strategically limited at the Deep Research and agent level, where the product&#039;s most differentiated value lives. The Pro plan, priced competitively at ~$15/month annually, is designed as the primary conversion target — removing friction for serious researchers with unlimited search and meaningful agent credit access — while Max scales up for users running agents at volume.</p>
<p><strong>Recommendation:</strong> LINER&#039;s pricing model is well-constructed for converting high-intent researchers who start on the free tier, quickly hit the Deep Research cap or agent credit ceiling, and find a clear, affordable upgrade path in Pro. The dual-metering system means users feel the constraint of their plan in multiple ways, creating persistent upgrade pressure without being punitive on basic usage. The companies and user segments best positioned for this model are academic institutions, research-heavy professional services firms, consulting teams, and individual knowledge workers — particularly those whose work depends on synthesizing large volumes of sources quickly and accurately.</p>
<h4>Key Insights</h4><ul><li> <strong>Dual-currency consumption architecture:</strong> LINER simultaneously gates access via hard feature caps (Deep Research counts, file upload limits) and a soft credit currency (agent credits). Most research or AI tools pick one monetization lever. <p><strong>Benefit:</strong> Free and entry-level tiers remain genuinely useful for everyday research tasks, while the credit system gives power users a flexible, spendable budget for the more complex agentic work they care most about.</p></li><li> <strong>Team Seat Efficiency (Per-Seat Resource Allocation):</strong> The team tier delivers Max-tier capabilities at per-seat pricing, with individual feature allocations rather than shared pools across the organization. <p><strong>Benefit:</strong> Research teams gain cost predictability with individual usage allocations, reducing friction in collaborative environments.</p></li><li> <strong>Annual-Only Max Tier (Commitment-Based Access):</strong> The highest individual tier requires annual commitment, while the Pro tier offers monthly flexibility for lower-commitment adoption. <p><strong>Benefit:</strong> Committed users secure the best individual pricing; casual users can evaluate Pro without annual lock-in.</p></li></ul>

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