Liner AI

Overview Liner AI is the browser first research assistant that started life in 2016 as a web highlighter — think Kindle style highlights, but for any web page you visit — and has spent the last few years rebuilding itself into something meaningfully more ambitious: a full featured AI research assistant that lives inside your browser, reads the pages you read, cites what it finds, and increasingly competes with Perplexity in the search with citations lane. The one line positioning: Liner AI is the research assistant for people who do their reading on the web and want an AI that stays alongside them there. Its distinctive value is proximity to the browser workflow. Where Perplexity is a destination — a URL you visit to ask a question — Liner is an overlay that shows up on top of whatever page you already have open. Highlight a passage, ask a question about it, get an AI answer that draws on both the current page and the wider web. It is a different posture than any of the standalone chatbots. Liner's user base is unusual for an AI tool — heavily international (huge in South Korea and Japan, growing in Southeast Asia and Latin America), heavily student and researcher skewed, and heavily mobile friendly in a category that has been aggressively desktop first. That international and mobile heritage shows in the product. The mobile app is genuinely good. The multi language support is real, not translated marketing. And the search UI feels…