Pomegra
South Korean AI firm Liner closes $36.1M Series C led by LB Investment to push its evidence-first research agent from 14M consumer users to enterprise clients.
- Liner closed $36.1M in Series C funding on Aug. 25, 2026, led by LB Investment, bringing total capital raised to $64.3M.
- The Seoul-based AI research agent serves 14 million users across 220 countries and ranks No. 30 in global AI web traffic.
- Liner scored 95.3 on OpenAI's SimpleQA benchmark, compared to GPT-4.5's 60, with factual accuracy cited as its primary competitive claim.
Lead
Seoul-based Liner announced a $36.1 million Series C on August 25, 2026, led by LB Investment. Returning investors InterVest, Atinum Investment, and CJ Investment followed on. New backers - Korea Development Bank, KB Securities, Daishin Securities, STIC Ventures, and Helios Private Equity - joined the round. The close brings total capital raised to $64.3 million. Valuation was not disclosed. CEO Luke Kim built Liner from a web-highlighter into an AI research agent with 14 million users; the Series C is the mechanism for converting that base into enterprise revenue.
What Does Liner Actually Do?
Liner structures its research agent around source retrieval first, answer generation second. The system finds and cites evidence before producing a response, rather than attaching citations after the fact. That architecture is the company's primary sales argument against general-purpose AI search tools.
Liner scored 95.3 on OpenAI's SimpleQA benchmark, which measures factual accuracy on short-form queries. GPT-4.5 scored 60 on the same test. To support that accuracy layer, Liner assembled its own index of 460 million scholarly documents, separate from standard web crawls. Three papers produced using Liner's research agent were accepted at Agents4Science 2025 at Stanford University, one of them by a high school student earning a Spotlight distinction. The product suite now covers three domains: Liner Scholar for academic research, Liner Write for business document generation, and Liner Finance for investment analysis.
Why Does the Enterprise Pivot Come Now?
Consumer AI monetization has structural limits. Fourteen million registered users and a No. 30 global rank in AI web traffic are defensible numbers, but free-tier consumer traffic does not cover the cost of competing against Perplexity, Google, and OpenAI's search products over the long run. Enterprise contracts are where the margin lives.
Accuracy is Liner's argument to buyers in regulated industries. In legal, finance, and life sciences, a hallucinated citation creates real liability - compliance teams can act on that distinction in a procurement conversation in ways they cannot on general capability claims. Liner's retrieval-first design reduces fabrication risk, which is a tractable pitch to risk-averse enterprise buyers.
The presence of Korea Development Bank alongside multiple Korean securities firms signals more than pure venture conviction. Government-linked capital in South Korean tech rounds typically reflects alignment with national priorities for AI export, adding a strategic dimension to what would otherwise read as a straightforward Series C.
What Did Prior Rounds Imply?
Before this Series C, Liner had raised approximately $28.2 million across earlier stages. The $36.1 million round more than doubles cumulative capital in a single close. That acceleration in check size, with no disclosed post-money valuation, suggests investors are pricing the enterprise transition at a significant premium over where the company stood at its last round. The actual conversion rate from consumer users to paying enterprise seats has not been disclosed, which is the number that will determine whether this round's implied optimism was warranted.
The company's San Francisco office functions as its U.S. enterprise sales headquarters. A disclosed partnership with HUMAIN, an AI venture backed by Saudi Arabia's Public Investment Fund, indicates parallel expansion into the Middle East market.
Outlook
Liner enters the enterprise market with a credible accuracy story, $36.1 million to fund a global sales build, and a large enough consumer base to make the brand recognizable. The plan allocates capital primarily to R&D, with secondary funding for talent acquisition and marketing across multiple regions simultaneously. That is an ambitious spend profile for a company still establishing its enterprise motion. The next disclosure that matters is not a product announcement but a revenue figure - specifically, whether enterprise contract volume is growing at a rate that matches the capital commitment made here.
